62 files changed, 2992 insertions, 602 deletions

diff --git a/tests/HistoryTest.php b/tests/HistoryTest.php
index 6dc0e5b7..e810104e 100644
--- a/tests/HistoryTest.php
+++ b/tests/HistoryTest.php
@@ -89,14 +89,6 @@ class HistoryTest extends \Shaarli\TestCase
         $this->assertEquals(History::CREATED, $actual['event']);
         $this->assertTrue(new DateTime('-2 seconds') < $actual['datetime']);
         $this->assertEquals(1, $actual['id']);
-
-        $history = new History(self::$historyFilePath);
-        $bookmark = (new Bookmark())->setId('str');
-        $history->addLink($bookmark);
-        $actual = $history->getHistory()[0];
-        $this->assertEquals(History::CREATED, $actual['event']);
-        $this->assertTrue(new DateTime('-2 seconds') < $actual['datetime']);
-        $this->assertEquals('str', $actual['id']);
     }
 
 //    /**
diff --git a/tests/UtilsTest.php b/tests/UtilsTest.php
index 6e787d7f..59dca75f 100644
--- a/tests/UtilsTest.php
+++ b/tests/UtilsTest.php
@@ -63,41 +63,25 @@ class UtilsTest extends \Shaarli\TestCase
     }
 
     /**
-     * Log a message to a file - IPv4 client address
+     * Format a log a message - IPv4 client address
      */
-    public function testLogmIp4()
+    public function testFormatLogIp4()
     {
-        $logMessage = 'IPv4 client connected';
-        logm(self::$testLogFile, '127.0.0.1', $logMessage);
-        list($date, $ip, $message) = $this->getLastLogEntry();
+        $message = 'IPv4 client connected';
+        $log = format_log($message, '127.0.0.1');
 
-        $this->assertInstanceOf(
-            'DateTime',
-            DateTime::createFromFormat(self::$dateFormat, $date)
-        );
-        $this->assertTrue(
-            filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) !== false
-        );
-        $this->assertEquals($logMessage, $message);
+        static::assertSame('- 127.0.0.1 - IPv4 client connected', $log);
     }
 
     /**
-     * Log a message to a file - IPv6 client address
+     * Format a log a message - IPv6 client address
      */
-    public function testLogmIp6()
+    public function testFormatLogIp6()
     {
-        $logMessage = 'IPv6 client connected';
-        logm(self::$testLogFile, '2001:db8::ff00:42:8329', $logMessage);
-        list($date, $ip, $message) = $this->getLastLogEntry();
+        $message = 'IPv6 client connected';
+        $log = format_log($message, '2001:db8::ff00:42:8329');
 
-        $this->assertInstanceOf(
-            'DateTime',
-            DateTime::createFromFormat(self::$dateFormat, $date)
-        );
-        $this->assertTrue(
-            filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) !== false
-        );
-        $this->assertEquals($logMessage, $message);
+        static::assertSame('- 2001:db8::ff00:42:8329 - IPv6 client connected', $log);
     }
 
     /**
diff --git a/tests/api/controllers/info/InfoTest.php b/tests/api/controllers/info/InfoTest.php
index 1598e1e8..10b29ab2 100644
--- a/tests/api/controllers/info/InfoTest.php
+++ b/tests/api/controllers/info/InfoTest.php
@@ -1,6 +1,7 @@
 <?php
 namespace Shaarli\Api\Controllers;
 
+use malkusch\lock\mutex\NoMutex;
 use Shaarli\Bookmark\BookmarkFileService;
 use Shaarli\Config\ConfigManager;
 use Shaarli\History;
@@ -49,6 +50,7 @@ class InfoTest extends TestCase
      */
     protected function setUp(): void
     {
+        $mutex = new NoMutex();
         $this->conf = new ConfigManager('tests/utils/config/configJson');
         $this->conf->set('resource.datastore', self::$testDatastore);
         $this->refDB = new \ReferenceLinkDB();
@@ -58,7 +60,7 @@ class InfoTest extends TestCase
 
         $this->container = new Container();
         $this->container['conf'] = $this->conf;
-        $this->container['db'] = new BookmarkFileService($this->conf, $history, true);
+        $this->container['db'] = new BookmarkFileService($this->conf, $history, $mutex, true);
         $this->container['history'] = null;
 
         $this->controller = new Info($this->container);
diff --git a/tests/api/controllers/links/DeleteLinkTest.php b/tests/api/controllers/links/DeleteLinkTest.php
index cf9464f0..805c9be3 100644
--- a/tests/api/controllers/links/DeleteLinkTest.php
+++ b/tests/api/controllers/links/DeleteLinkTest.php
@@ -3,6 +3,7 @@
 
 namespace Shaarli\Api\Controllers;
 
+use malkusch\lock\mutex\NoMutex;
 use Shaarli\Bookmark\BookmarkFileService;
 use Shaarli\Config\ConfigManager;
 use Shaarli\History;
@@ -53,11 +54,15 @@ class DeleteLinkTest extends \Shaarli\TestCase
      */
     protected $controller;
 
+    /** @var NoMutex */
+    protected $mutex;
+
     /**
      * Before each test, instantiate a new Api with its config, plugins and bookmarks.
      */
     protected function setUp(): void
     {
+        $this->mutex = new NoMutex();
         $this->conf = new ConfigManager('tests/utils/config/configJson');
         $this->conf->set('resource.datastore', self::$testDatastore);
         $this->refDB = new \ReferenceLinkDB();
@@ -65,7 +70,7 @@ class DeleteLinkTest extends \Shaarli\TestCase
         $refHistory = new \ReferenceHistory();
         $refHistory->write(self::$testHistory);
         $this->history = new History(self::$testHistory);
-        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, true);
+        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
 
         $this->container = new Container();
         $this->container['conf'] = $this->conf;
@@ -100,7 +105,7 @@ class DeleteLinkTest extends \Shaarli\TestCase
         $this->assertEquals(204, $response->getStatusCode());
         $this->assertEmpty((string) $response->getBody());
 
-        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, true);
+        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
         $this->assertFalse($this->bookmarkService->exists($id));
 
         $historyEntry = $this->history->getHistory()[0];
diff --git a/tests/api/controllers/links/GetLinkIdTest.php b/tests/api/controllers/links/GetLinkIdTest.php
index 99dc606f..1ec56ef3 100644
--- a/tests/api/controllers/links/GetLinkIdTest.php
+++ b/tests/api/controllers/links/GetLinkIdTest.php
@@ -2,6 +2,7 @@
 
 namespace Shaarli\Api\Controllers;
 
+use malkusch\lock\mutex\NoMutex;
 use Shaarli\Bookmark\Bookmark;
 use Shaarli\Bookmark\BookmarkFileService;
 use Shaarli\Config\ConfigManager;
@@ -57,6 +58,7 @@ class GetLinkIdTest extends \Shaarli\TestCase
      */
     protected function setUp(): void
     {
+        $mutex = new NoMutex();
         $this->conf = new ConfigManager('tests/utils/config/configJson');
         $this->conf->set('resource.datastore', self::$testDatastore);
         $this->refDB = new \ReferenceLinkDB();
@@ -65,7 +67,7 @@ class GetLinkIdTest extends \Shaarli\TestCase
 
         $this->container = new Container();
         $this->container['conf'] = $this->conf;
-        $this->container['db'] = new BookmarkFileService($this->conf, $history, true);
+        $this->container['db'] = new BookmarkFileService($this->conf, $history, $mutex, true);
         $this->container['history'] = null;
 
         $this->controller = new Links($this->container);
diff --git a/tests/api/controllers/links/GetLinksTest.php b/tests/api/controllers/links/GetLinksTest.php
index ca1bfc63..b1c46ee2 100644
--- a/tests/api/controllers/links/GetLinksTest.php
+++ b/tests/api/controllers/links/GetLinksTest.php
@@ -1,6 +1,7 @@
 <?php
 namespace Shaarli\Api\Controllers;
 
+use malkusch\lock\mutex\NoMutex;
 use Shaarli\Bookmark\Bookmark;
 use Shaarli\Bookmark\BookmarkFileService;
 use Shaarli\Bookmark\LinkDB;
@@ -57,6 +58,7 @@ class GetLinksTest extends \Shaarli\TestCase
      */
     protected function setUp(): void
     {
+        $mutex = new NoMutex();
         $this->conf = new ConfigManager('tests/utils/config/configJson');
         $this->conf->set('resource.datastore', self::$testDatastore);
         $this->refDB = new \ReferenceLinkDB();
@@ -65,7 +67,7 @@ class GetLinksTest extends \Shaarli\TestCase
 
         $this->container = new Container();
         $this->container['conf'] = $this->conf;
-        $this->container['db'] = new BookmarkFileService($this->conf, $history, true);
+        $this->container['db'] = new BookmarkFileService($this->conf, $history, $mutex, true);
         $this->container['history'] = null;
 
         $this->controller = new Links($this->container);
@@ -396,7 +398,7 @@ class GetLinksTest extends \Shaarli\TestCase
         $response = $this->controller->getLinks($request, new Response());
         $this->assertEquals(200, $response->getStatusCode());
         $data = json_decode((string) $response->getBody(), true);
-        $this->assertEquals(4, count($data));
+        $this->assertEquals(5, count($data));
         $this->assertEquals(6, $data[0]['id']);
 
         // wildcard: placeholder at the middle
diff --git a/tests/api/controllers/links/PostLinkTest.php b/tests/api/controllers/links/PostLinkTest.php
index fe3de66f..e12f803b 100644
--- a/tests/api/controllers/links/PostLinkTest.php
+++ b/tests/api/controllers/links/PostLinkTest.php
@@ -2,6 +2,7 @@
 
 namespace Shaarli\Api\Controllers;
 
+use malkusch\lock\mutex\NoMutex;
 use Shaarli\Bookmark\Bookmark;
 use Shaarli\Bookmark\BookmarkFileService;
 use Shaarli\Config\ConfigManager;
@@ -72,6 +73,7 @@ class PostLinkTest extends TestCase
      */
     protected function setUp(): void
     {
+        $mutex = new NoMutex();
         $this->conf = new ConfigManager('tests/utils/config/configJson');
         $this->conf->set('resource.datastore', self::$testDatastore);
         $this->refDB = new \ReferenceLinkDB();
@@ -79,7 +81,7 @@ class PostLinkTest extends TestCase
         $refHistory = new \ReferenceHistory();
         $refHistory->write(self::$testHistory);
         $this->history = new History(self::$testHistory);
-        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, true);
+        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, $mutex, true);
 
         $this->container = new Container();
         $this->container['conf'] = $this->conf;
@@ -90,8 +92,8 @@ class PostLinkTest extends TestCase
 
         $mock = $this->createMock(Router::class);
         $mock->expects($this->any())
-             ->method('relativePathFor')
-             ->willReturn('api/v1/bookmarks/1');
+             ->method('pathFor')
+             ->willReturn('/api/v1/bookmarks/1');
 
         // affect @property-read... seems to work
         $this->controller->getCi()->router = $mock;
@@ -126,7 +128,7 @@ class PostLinkTest extends TestCase
 
         $response = $this->controller->postLink($request, new Response());
         $this->assertEquals(201, $response->getStatusCode());
-        $this->assertEquals('api/v1/bookmarks/1', $response->getHeader('Location')[0]);
+        $this->assertEquals('/api/v1/bookmarks/1', $response->getHeader('Location')[0]);
         $data = json_decode((string) $response->getBody(), true);
         $this->assertEquals(self::NB_FIELDS_LINK, count($data));
         $this->assertEquals(43, $data['id']);
@@ -160,6 +162,8 @@ class PostLinkTest extends TestCase
             'description' => 'shaare description',
             'tags' => ['one', 'two'],
             'private' => true,
+            'created' => '2015-05-05T12:30:00+03:00',
+            'updated' => '2016-06-05T14:32:10+03:00',
         ];
         $env = Environment::mock([
             'REQUEST_METHOD' => 'POST',
@@ -171,7 +175,7 @@ class PostLinkTest extends TestCase
         $response = $this->controller->postLink($request, new Response());
 
         $this->assertEquals(201, $response->getStatusCode());
-        $this->assertEquals('api/v1/bookmarks/1', $response->getHeader('Location')[0]);
+        $this->assertEquals('/api/v1/bookmarks/1', $response->getHeader('Location')[0]);
         $data = json_decode((string) $response->getBody(), true);
         $this->assertEquals(self::NB_FIELDS_LINK, count($data));
         $this->assertEquals(43, $data['id']);
@@ -181,10 +185,8 @@ class PostLinkTest extends TestCase
         $this->assertEquals($link['description'], $data['description']);
         $this->assertEquals($link['tags'], $data['tags']);
         $this->assertEquals(true, $data['private']);
-        $this->assertTrue(
-            new \DateTime('2 seconds ago') < \DateTime::createFromFormat(\DateTime::ATOM, $data['created'])
-        );
-        $this->assertEquals('', $data['updated']);
+        $this->assertSame($link['created'], $data['created']);
+        $this->assertSame($link['updated'], $data['updated']);
     }
 
     /**
diff --git a/tests/api/controllers/links/PutLinkTest.php b/tests/api/controllers/links/PutLinkTest.php
index a2e87c59..240ee323 100644
--- a/tests/api/controllers/links/PutLinkTest.php
+++ b/tests/api/controllers/links/PutLinkTest.php
@@ -3,6 +3,7 @@
 
 namespace Shaarli\Api\Controllers;
 
+use malkusch\lock\mutex\NoMutex;
 use Shaarli\Bookmark\Bookmark;
 use Shaarli\Bookmark\BookmarkFileService;
 use Shaarli\Config\ConfigManager;
@@ -64,6 +65,7 @@ class PutLinkTest extends \Shaarli\TestCase
      */
     protected function setUp(): void
     {
+        $mutex = new NoMutex();
         $this->conf = new ConfigManager('tests/utils/config/configJson');
         $this->conf->set('resource.datastore', self::$testDatastore);
         $this->refDB = new \ReferenceLinkDB();
@@ -71,7 +73,7 @@ class PutLinkTest extends \Shaarli\TestCase
         $refHistory = new \ReferenceHistory();
         $refHistory->write(self::$testHistory);
         $this->history = new History(self::$testHistory);
-        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, true);
+        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, $mutex, true);
 
         $this->container = new Container();
         $this->container['conf'] = $this->conf;
diff --git a/tests/api/controllers/tags/DeleteTagTest.php b/tests/api/controllers/tags/DeleteTagTest.php
index 1326eb47..37f07229 100644
--- a/tests/api/controllers/tags/DeleteTagTest.php
+++ b/tests/api/controllers/tags/DeleteTagTest.php
@@ -3,6 +3,7 @@
 
 namespace Shaarli\Api\Controllers;
 
+use malkusch\lock\mutex\NoMutex;
 use Shaarli\Bookmark\BookmarkFileService;
 use Shaarli\Bookmark\LinkDB;
 use Shaarli\Config\ConfigManager;
@@ -54,11 +55,15 @@ class DeleteTagTest extends \Shaarli\TestCase
      */
     protected $controller;
 
+    /** @var NoMutex */
+    protected $mutex;
+
     /**
      * Before each test, instantiate a new Api with its config, plugins and bookmarks.
      */
     protected function setUp(): void
     {
+        $this->mutex = new NoMutex();
         $this->conf = new ConfigManager('tests/utils/config/configJson');
         $this->conf->set('resource.datastore', self::$testDatastore);
         $this->refDB = new \ReferenceLinkDB();
@@ -66,7 +71,7 @@ class DeleteTagTest extends \Shaarli\TestCase
         $refHistory = new \ReferenceHistory();
         $refHistory->write(self::$testHistory);
         $this->history = new History(self::$testHistory);
-        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, true);
+        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
 
         $this->container = new Container();
         $this->container['conf'] = $this->conf;
@@ -102,7 +107,7 @@ class DeleteTagTest extends \Shaarli\TestCase
         $this->assertEquals(204, $response->getStatusCode());
         $this->assertEmpty((string) $response->getBody());
 
-        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, true);
+        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
         $tags = $this->bookmarkService->bookmarksCountPerTag();
         $this->assertFalse(isset($tags[$tagName]));
 
@@ -136,7 +141,7 @@ class DeleteTagTest extends \Shaarli\TestCase
         $this->assertEquals(204, $response->getStatusCode());
         $this->assertEmpty((string) $response->getBody());
 
-        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, true);
+        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
         $tags = $this->bookmarkService->bookmarksCountPerTag();
         $this->assertFalse(isset($tags[$tagName]));
         $this->assertTrue($tags[strtolower($tagName)] > 0);
diff --git a/tests/api/controllers/tags/GetTagNameTest.php b/tests/api/controllers/tags/GetTagNameTest.php
index 9c05954b..878de5a4 100644
--- a/tests/api/controllers/tags/GetTagNameTest.php
+++ b/tests/api/controllers/tags/GetTagNameTest.php
@@ -2,6 +2,7 @@
 
 namespace Shaarli\Api\Controllers;
 
+use malkusch\lock\mutex\NoMutex;
 use Shaarli\Bookmark\BookmarkFileService;
 use Shaarli\Bookmark\LinkDB;
 use Shaarli\Config\ConfigManager;
@@ -55,6 +56,7 @@ class GetTagNameTest extends \Shaarli\TestCase
      */
     protected function setUp(): void
     {
+        $mutex = new NoMutex();
         $this->conf = new ConfigManager('tests/utils/config/configJson');
         $this->conf->set('resource.datastore', self::$testDatastore);
         $this->refDB = new \ReferenceLinkDB();
@@ -63,7 +65,7 @@ class GetTagNameTest extends \Shaarli\TestCase
 
         $this->container = new Container();
         $this->container['conf'] = $this->conf;
-        $this->container['db'] = new BookmarkFileService($this->conf, $history, true);
+        $this->container['db'] = new BookmarkFileService($this->conf, $history, $mutex, true);
         $this->container['history'] = null;
 
         $this->controller = new Tags($this->container);
diff --git a/tests/api/controllers/tags/GetTagsTest.php b/tests/api/controllers/tags/GetTagsTest.php
index 3459fdfa..b565a8c4 100644
--- a/tests/api/controllers/tags/GetTagsTest.php
+++ b/tests/api/controllers/tags/GetTagsTest.php
@@ -1,6 +1,7 @@
 <?php
 namespace Shaarli\Api\Controllers;
 
+use malkusch\lock\mutex\NoMutex;
 use Shaarli\Bookmark\BookmarkFileService;
 use Shaarli\Bookmark\LinkDB;
 use Shaarli\Config\ConfigManager;
@@ -59,13 +60,14 @@ class GetTagsTest extends \Shaarli\TestCase
      */
     protected function setUp(): void
     {
+        $mutex = new NoMutex();
         $this->conf = new ConfigManager('tests/utils/config/configJson');
         $this->conf->set('resource.datastore', self::$testDatastore);
         $this->refDB = new \ReferenceLinkDB();
         $this->refDB->write(self::$testDatastore);
         $history = new History('sandbox/history.php');
 
-        $this->bookmarkService = new BookmarkFileService($this->conf, $history, true);
+        $this->bookmarkService = new BookmarkFileService($this->conf, $history, $mutex, true);
 
         $this->container = new Container();
         $this->container['conf'] = $this->conf;
diff --git a/tests/api/controllers/tags/PutTagTest.php b/tests/api/controllers/tags/PutTagTest.php
index 74edde78..c73f6d3b 100644
--- a/tests/api/controllers/tags/PutTagTest.php
+++ b/tests/api/controllers/tags/PutTagTest.php
@@ -2,6 +2,7 @@
 
 namespace Shaarli\Api\Controllers;
 
+use malkusch\lock\mutex\NoMutex;
 use Shaarli\Api\Exceptions\ApiBadParametersException;
 use Shaarli\Bookmark\BookmarkFileService;
 use Shaarli\Bookmark\LinkDB;
@@ -64,6 +65,7 @@ class PutTagTest extends \Shaarli\TestCase
      */
     protected function setUp(): void
     {
+        $mutex = new NoMutex();
         $this->conf = new ConfigManager('tests/utils/config/configJson');
         $this->conf->set('resource.datastore', self::$testDatastore);
         $this->refDB = new \ReferenceLinkDB();
@@ -71,7 +73,7 @@ class PutTagTest extends \Shaarli\TestCase
         $refHistory = new \ReferenceHistory();
         $refHistory->write(self::$testHistory);
         $this->history = new History(self::$testHistory);
-        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, true);
+        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, $mutex, true);
 
         $this->container = new Container();
         $this->container['conf'] = $this->conf;
diff --git a/tests/bookmark/BookmarkArrayTest.php b/tests/bookmark/BookmarkArrayTest.php
index ebed9bfc..1953078c 100644
--- a/tests/bookmark/BookmarkArrayTest.php
+++ b/tests/bookmark/BookmarkArrayTest.php
@@ -91,19 +91,6 @@ class BookmarkArrayTest extends TestCase
     }
 
     /**
-     * Test adding a bad entry: invalid ID type
-     */
-    public function testArrayAccessAddBadEntryIdType()
-    {
-        $this->expectException(\Shaarli\Bookmark\Exception\InvalidBookmarkException::class);
-
-        $array = new BookmarkArray();
-        $bookmark = (new Bookmark())->setId('nope');
-        $bookmark->validate();
-        $array[] = $bookmark;
-    }
-
-    /**
      * Test adding a bad entry: ID/offset not consistent
      */
     public function testArrayAccessAddBadEntryIdOffset()
diff --git a/tests/bookmark/BookmarkFileServiceTest.php b/tests/bookmark/BookmarkFileServiceTest.php
index c399822b..f619aff3 100644
--- a/tests/bookmark/BookmarkFileServiceTest.php
+++ b/tests/bookmark/BookmarkFileServiceTest.php
@@ -6,6 +6,7 @@
 namespace Shaarli\Bookmark;
 
 use DateTime;
+use malkusch\lock\mutex\NoMutex;
 use ReferenceLinkDB;
 use ReflectionClass;
 use Shaarli;
@@ -52,6 +53,9 @@ class BookmarkFileServiceTest extends TestCase
      */
     protected $privateLinkDB = null;
 
+    /** @var NoMutex */
+    protected $mutex;
+
     /**
      * Instantiates public and private LinkDBs with test data
      *
@@ -68,6 +72,8 @@ class BookmarkFileServiceTest extends TestCase
      */
     protected function setUp(): void
     {
+        $this->mutex = new NoMutex();
+
         if (file_exists(self::$testDatastore)) {
             unlink(self::$testDatastore);
         }
@@ -87,8 +93,8 @@ class BookmarkFileServiceTest extends TestCase
         $this->refDB = new \ReferenceLinkDB();
         $this->refDB->write(self::$testDatastore);
         $this->history = new History('sandbox/history.php');
-        $this->publicLinkDB = new BookmarkFileService($this->conf, $this->history, false);
-        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, true);
+        $this->publicLinkDB = new BookmarkFileService($this->conf, $this->history, $this->mutex, false);
+        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
     }
 
     /**
@@ -105,7 +111,7 @@ class BookmarkFileServiceTest extends TestCase
         $db = self::getMethod('migrate');
         $db->invokeArgs($this->privateLinkDB, []);
 
-        $db = new \FakeBookmarkService($this->conf, $this->history, true);
+        $db = new \FakeBookmarkService($this->conf, $this->history, $this->mutex, true);
         $this->assertInstanceOf(BookmarkArray::class, $db->getBookmarks());
         $this->assertEquals($this->refDB->countLinks(), $db->count());
     }
@@ -174,7 +180,7 @@ class BookmarkFileServiceTest extends TestCase
         $this->assertEquals($updated, $bookmark->getUpdated());
 
         // reload from file
-        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, true);
+        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
 
         $bookmark = $this->privateLinkDB->get(43);
         $this->assertEquals(43, $bookmark->getId());
@@ -212,7 +218,7 @@ class BookmarkFileServiceTest extends TestCase
         $this->assertNull($bookmark->getUpdated());
 
         // reload from file
-        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, true);
+        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
 
         $bookmark = $this->privateLinkDB->get(43);
         $this->assertEquals(43, $bookmark->getId());
@@ -242,7 +248,7 @@ class BookmarkFileServiceTest extends TestCase
         $this->assertEquals(43, $bookmark->getId());
 
         // reload from file
-        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, true);
+        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
 
         $this->privateLinkDB->get(43);
     }
@@ -259,17 +265,6 @@ class BookmarkFileServiceTest extends TestCase
     }
 
     /**
-     * Test add() method with an entry which is not a bookmark instance
-     */
-    public function testAddNotABookmark()
-    {
-        $this->expectException(\Exception::class);
-        $this->expectExceptionMessage('Provided data is invalid');
-
-        $this->privateLinkDB->add(['title' => 'hi!']);
-    }
-
-    /**
      * Test add() method with a Bookmark already containing an ID
      */
     public function testAddWithId()
@@ -314,7 +309,7 @@ class BookmarkFileServiceTest extends TestCase
         $this->assertTrue(new \DateTime('5 seconds ago') < $bookmark->getUpdated());
 
         // reload from file
-        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, true);
+        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
 
         $bookmark = $this->privateLinkDB->get(42);
         $this->assertEquals(42, $bookmark->getId());
@@ -355,7 +350,7 @@ class BookmarkFileServiceTest extends TestCase
         $this->assertTrue(new \DateTime('5 seconds ago') < $bookmark->getUpdated());
 
         // reload from file
-        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, true);
+        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
 
         $bookmark = $this->privateLinkDB->get(42);
         $this->assertEquals(42, $bookmark->getId());
@@ -388,7 +383,7 @@ class BookmarkFileServiceTest extends TestCase
         $this->assertEquals($title, $bookmark->getTitle());
 
         // reload from file
-        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, true);
+        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
 
         $bookmark = $this->privateLinkDB->get(42);
         $this->assertEquals(42, $bookmark->getId());
@@ -407,17 +402,6 @@ class BookmarkFileServiceTest extends TestCase
     }
 
     /**
-     * Test set() method with an entry which is not a bookmark instance
-     */
-    public function testSetNotABookmark()
-    {
-        $this->expectException(\Exception::class);
-        $this->expectExceptionMessage('Provided data is invalid');
-
-        $this->privateLinkDB->set(['title' => 'hi!']);
-    }
-
-    /**
      * Test set() method with a Bookmark without an ID defined.
      */
     public function testSetWithoutId()
@@ -452,7 +436,7 @@ class BookmarkFileServiceTest extends TestCase
         $this->assertEquals(43, $bookmark->getId());
 
         // reload from file
-        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, true);
+        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
 
         $bookmark = $this->privateLinkDB->get(43);
         $this->assertEquals(43, $bookmark->getId());
@@ -472,7 +456,7 @@ class BookmarkFileServiceTest extends TestCase
         $this->assertEquals($title, $bookmark->getTitle());
 
         // reload from file
-        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, true);
+        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
 
         $bookmark = $this->privateLinkDB->get(42);
         $this->assertEquals(42, $bookmark->getId());
@@ -491,17 +475,6 @@ class BookmarkFileServiceTest extends TestCase
     }
 
     /**
-     * Test addOrSet() method with an entry which is not a bookmark instance
-     */
-    public function testAddOrSetNotABookmark()
-    {
-        $this->expectException(\Exception::class);
-        $this->expectExceptionMessage('Provided data is invalid');
-
-        $this->privateLinkDB->addOrSet(['title' => 'hi!']);
-    }
-
-    /**
      * Test addOrSet() method for a bookmark without any field set and without writing the data store
      */
     public function testAddOrSetMinimalNoWrite()
@@ -515,7 +488,7 @@ class BookmarkFileServiceTest extends TestCase
         $this->assertEquals($title, $bookmark->getTitle());
 
         // reload from file
-        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, true);
+        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
 
         $bookmark = $this->privateLinkDB->get(42);
         $this->assertEquals(42, $bookmark->getId());
@@ -541,7 +514,7 @@ class BookmarkFileServiceTest extends TestCase
         $this->assertInstanceOf(BookmarkNotFoundException::class, $exception);
 
         // reload from file
-        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, true);
+        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
 
         $this->privateLinkDB->get(42);
     }
@@ -559,17 +532,6 @@ class BookmarkFileServiceTest extends TestCase
     }
 
     /**
-     * Test remove() method with an entry which is not a bookmark instance
-     */
-    public function testRemoveNotABookmark()
-    {
-        $this->expectException(\Exception::class);
-        $this->expectExceptionMessage('Provided data is invalid');
-
-        $this->privateLinkDB->remove(['title' => 'hi!']);
-    }
-
-    /**
      * Test remove() method with a Bookmark with an unknown ID
      */
     public function testRemoveWithUnknownId()
@@ -645,7 +607,7 @@ class BookmarkFileServiceTest extends TestCase
 
         $conf = new ConfigManager('tests/utils/config/configJson');
         $conf->set('resource.datastore', 'null/store.db');
-        new BookmarkFileService($conf, $this->history, true);
+        new BookmarkFileService($conf, $this->history, $this->mutex, true);
     }
 
     /**
@@ -655,7 +617,7 @@ class BookmarkFileServiceTest extends TestCase
     {
         unlink(self::$testDatastore);
         $this->assertFileNotExists(self::$testDatastore);
-        new BookmarkFileService($this->conf, $this->history, true);
+        new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
         $this->assertFileExists(self::$testDatastore);
 
         // ensure the correct data has been written
@@ -669,7 +631,7 @@ class BookmarkFileServiceTest extends TestCase
     {
         unlink(self::$testDatastore);
         $this->assertFileNotExists(self::$testDatastore);
-        $db = new \FakeBookmarkService($this->conf, $this->history, false);
+        $db = new \FakeBookmarkService($this->conf, $this->history, $this->mutex, false);
         $this->assertFileNotExists(self::$testDatastore);
         $this->assertInstanceOf(BookmarkArray::class, $db->getBookmarks());
         $this->assertCount(0, $db->getBookmarks());
@@ -702,13 +664,13 @@ class BookmarkFileServiceTest extends TestCase
      */
     public function testSave()
     {
-        $testDB = new BookmarkFileService($this->conf, $this->history, true);
+        $testDB = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
         $dbSize = $testDB->count();
 
         $bookmark = new Bookmark();
         $testDB->add($bookmark);
 
-        $testDB = new BookmarkFileService($this->conf, $this->history, true);
+        $testDB = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
         $this->assertEquals($dbSize + 1, $testDB->count());
     }
 
@@ -718,28 +680,12 @@ class BookmarkFileServiceTest extends TestCase
     public function testCountHiddenPublic()
     {
         $this->conf->set('privacy.hide_public_links', true);
-        $linkDB = new BookmarkFileService($this->conf, $this->history, false);
+        $linkDB = new BookmarkFileService($this->conf, $this->history, $this->mutex, false);
 
         $this->assertEquals(0, $linkDB->count());
     }
 
     /**
-     * List the days for which bookmarks have been posted
-     */
-    public function testDays()
-    {
-        $this->assertEquals(
-            ['20100309', '20100310', '20121206', '20121207', '20130614', '20150310'],
-            $this->publicLinkDB->days()
-        );
-
-        $this->assertEquals(
-            ['20100309', '20100310', '20121206', '20121207', '20130614', '20141125', '20150310'],
-            $this->privateLinkDB->days()
-        );
-    }
-
-    /**
      * The URL corresponds to an existing entry in the DB
      */
     public function testGetKnownLinkFromURL()
@@ -786,6 +732,10 @@ class BookmarkFileServiceTest extends TestCase
                 // They need to be grouped with the first case found - order by date DESC: `sTuff`.
                 'sTuff' => 2,
                 'ut' => 1,
+                'assurance' => 1,
+                'coding-style' => 1,
+                'quality' => 1,
+                'standards' => 1,
             ],
             $this->publicLinkDB->bookmarksCountPerTag()
         );
@@ -814,6 +764,10 @@ class BookmarkFileServiceTest extends TestCase
                 'tag3' => 1,
                 'tag4' => 1,
                 'ut' => 1,
+                'assurance' => 1,
+                'coding-style' => 1,
+                'quality' => 1,
+                'standards' => 1,
             ],
             $this->privateLinkDB->bookmarksCountPerTag()
         );
@@ -928,6 +882,37 @@ class BookmarkFileServiceTest extends TestCase
     }
 
     /**
+     * Test filterHash() on a private bookmark while logged out.
+     */
+    public function testFilterHashPrivateWhileLoggedOut()
+    {
+        $this->expectException(BookmarkNotFoundException::class);
+        $this->expectExceptionMessage('The link you are trying to reach does not exist or has been deleted');
+
+        $hash = smallHash('20141125_084734' . 6);
+
+        $this->publicLinkDB->findByHash($hash);
+    }
+
+    /**
+     * Test filterHash() with private key.
+     */
+    public function testFilterHashWithPrivateKey()
+    {
+        $hash = smallHash('20141125_084734' . 6);
+        $privateKey = 'this is usually auto generated';
+
+        $bookmark = $this->privateLinkDB->findByHash($hash);
+        $bookmark->addAdditionalContentEntry('private_key', $privateKey);
+        $this->privateLinkDB->save();
+
+        $this->privateLinkDB = new BookmarkFileService($this->conf, $this->history, $this->mutex, false);
+        $bookmark = $this->privateLinkDB->findByHash($hash, $privateKey);
+
+        static::assertSame(6, $bookmark->getId());
+    }
+
+    /**
      * Test linksCountPerTag all tags without filter.
      * Equal occurrences should be sorted alphabetically.
      */
@@ -956,6 +941,10 @@ class BookmarkFileServiceTest extends TestCase
             'tag4' => 1,
             'ut' => 1,
             'w3c' => 1,
+            'assurance' => 1,
+            'coding-style' => 1,
+            'quality' => 1,
+            'standards' => 1,
         ];
         $tags = $this->privateLinkDB->bookmarksCountPerTag();
 
@@ -1054,6 +1043,10 @@ class BookmarkFileServiceTest extends TestCase
             'stallman' => 1,
             'ut' => 1,
             'w3c' => 1,
+            'assurance' => 1,
+            'coding-style' => 1,
+            'quality' => 1,
+            'standards' => 1,
         ];
         $bookmark = new Bookmark();
         $bookmark->setTags(['newTagToCount', BookmarkMarkdownFormatter::NO_MD_TAG]);
@@ -1065,33 +1058,105 @@ class BookmarkFileServiceTest extends TestCase
     }
 
     /**
-     * Test filterDay while logged in
+     * Test find by dates in the middle of the datastore (sorted by dates) with a single bookmark as a result.
      */
-    public function testFilterDayLoggedIn(): void
+    public function testFilterByDateMidTimePeriodSingleBookmark(): void
     {
-        $bookmarks = $this->privateLinkDB->filterDay('20121206');
-        $expectedIds = [4, 9, 1, 0];
+        $bookmarks = $this->privateLinkDB->findByDate(
+            DateTime::createFromFormat('Ymd_His', '20121206_150000'),
+            DateTime::createFromFormat('Ymd_His', '20121206_160000'),
+            $before,
+            $after
+        );
 
-        static::assertCount(4, $bookmarks);
-        foreach ($bookmarks as $bookmark) {
-            $i = ($i ?? -1) + 1;
-            static::assertSame($expectedIds[$i], $bookmark->getId());
-        }
+        static::assertCount(1, $bookmarks);
+
+        static::assertSame(9, $bookmarks[0]->getId());
+        static::assertEquals(DateTime::createFromFormat('Ymd_His', '20121206_142300'), $before);
+        static::assertEquals(DateTime::createFromFormat('Ymd_His', '20121206_172539'), $after);
     }
 
     /**
-     * Test filterDay while logged out
+     * Test find by dates in the middle of the datastore (sorted by dates) with a multiple bookmarks as a result.
      */
-    public function testFilterDayLoggedOut(): void
+    public function testFilterByDateMidTimePeriodMultipleBookmarks(): void
     {
-        $bookmarks = $this->publicLinkDB->filterDay('20121206');
-        $expectedIds = [4, 9, 1];
+        $bookmarks = $this->privateLinkDB->findByDate(
+            DateTime::createFromFormat('Ymd_His', '20121206_150000'),
+            DateTime::createFromFormat('Ymd_His', '20121206_180000'),
+            $before,
+            $after
+        );
 
-        static::assertCount(3, $bookmarks);
-        foreach ($bookmarks as $bookmark) {
-            $i = ($i ?? -1) + 1;
-            static::assertSame($expectedIds[$i], $bookmark->getId());
-        }
+        static::assertCount(2, $bookmarks);
+
+        static::assertSame(1, $bookmarks[0]->getId());
+        static::assertSame(9, $bookmarks[1]->getId());
+        static::assertEquals(DateTime::createFromFormat('Ymd_His', '20121206_142300'), $before);
+        static::assertEquals(DateTime::createFromFormat('Ymd_His', '20121206_182539'), $after);
+    }
+
+    /**
+     * Test find by dates at the end of the datastore (sorted by dates).
+     */
+    public function testFilterByDateLastTimePeriod(): void
+    {
+        $after = new DateTime();
+        $bookmarks = $this->privateLinkDB->findByDate(
+            DateTime::createFromFormat('Ymd_His', '20150310_114640'),
+            DateTime::createFromFormat('Ymd_His', '20450101_010101'),
+            $before,
+            $after
+        );
+
+        static::assertCount(1, $bookmarks);
+
+        static::assertSame(41, $bookmarks[0]->getId());
+        static::assertEquals(DateTime::createFromFormat('Ymd_His', '20150310_114633'), $before);
+        static::assertNull($after);
+    }
+
+    /**
+     * Test find by dates at the beginning of the datastore (sorted by dates).
+     */
+    public function testFilterByDateFirstTimePeriod(): void
+    {
+        $before = new DateTime();
+        $bookmarks = $this->privateLinkDB->findByDate(
+            DateTime::createFromFormat('Ymd_His', '20000101_101010'),
+            DateTime::createFromFormat('Ymd_His', '20100309_110000'),
+            $before,
+            $after
+        );
+
+        static::assertCount(1, $bookmarks);
+
+        static::assertSame(11, $bookmarks[0]->getId());
+        static::assertNull($before);
+        static::assertEquals(DateTime::createFromFormat('Ymd_His', '20100310_101010'), $after);
+    }
+
+    /**
+     * Test getLatest with a sticky bookmark: it should be ignored and return the latest by creation date instead.
+     */
+    public function testGetLatestWithSticky(): void
+    {
+        $bookmark = $this->publicLinkDB->getLatest();
+
+        static::assertSame(41, $bookmark->getId());
+    }
+
+    /**
+     * Test getLatest with a sticky bookmark: it should be ignored and return the latest by creation date instead.
+     */
+    public function testGetLatestEmptyDatastore(): void
+    {
+        unlink($this->conf->get('resource.datastore'));
+        $this->publicLinkDB = new BookmarkFileService($this->conf, $this->history, $this->mutex, false);
+
+        $bookmark = $this->publicLinkDB->getLatest();
+
+        static::assertNull($bookmark);
     }
 
     /**
diff --git a/tests/bookmark/BookmarkFilterTest.php b/tests/bookmark/BookmarkFilterTest.php
index 48c7f824..835674f2 100644
--- a/tests/bookmark/BookmarkFilterTest.php
+++ b/tests/bookmark/BookmarkFilterTest.php
@@ -2,7 +2,7 @@
 
 namespace Shaarli\Bookmark;
 
-use Exception;
+use malkusch\lock\mutex\NoMutex;
 use ReferenceLinkDB;
 use Shaarli\Config\ConfigManager;
 use Shaarli\History;
@@ -37,13 +37,14 @@ class BookmarkFilterTest extends TestCase
      */
     public static function setUpBeforeClass(): void
     {
+        $mutex = new NoMutex();
         $conf = new ConfigManager('tests/utils/config/configJson');
         $conf->set('resource.datastore', self::$testDatastore);
         self::$refDB = new \ReferenceLinkDB();
         self::$refDB->write(self::$testDatastore);
         $history = new History('sandbox/history.php');
-        self::$bookmarkService = new \FakeBookmarkService($conf, $history, true);
-        self::$linkFilter = new BookmarkFilter(self::$bookmarkService->getBookmarks());
+        self::$bookmarkService = new \FakeBookmarkService($conf, $history, $mutex, true);
+        self::$linkFilter = new BookmarkFilter(self::$bookmarkService->getBookmarks(), $conf);
     }
 
     /**
@@ -523,4 +524,43 @@ class BookmarkFilterTest extends TestCase
             ))
         );
     }
+
+    /**
+     * Test search result highlights in every field of bookmark reference #9.
+     */
+    public function testFullTextSearchHighlight(): void
+    {
+        $bookmarks = self::$linkFilter->filter(
+            BookmarkFilter::$FILTER_TEXT,
+            '"psr-2" coding guide http fig "psr-2/" "This guide" basic standard. coding-style quality assurance'
+        );
+
+        static::assertCount(1, $bookmarks);
+        static::assertArrayHasKey(9, $bookmarks);
+
+        $bookmark = $bookmarks[9];
+        $expectedHighlights = [
+            'title' => [
+                ['start' => 0, 'end' => 5], // "psr-2"
+                ['start' => 7, 'end' => 13], // coding
+                ['start' => 20, 'end' => 25], // guide
+            ],
+            'description' => [
+                ['start' => 0, 'end' => 10], // "This guide"
+                ['start' => 45, 'end' => 50], // basic
+                ['start' => 58, 'end' => 67], // standard.
+            ],
+            'url' => [
+                ['start' => 0, 'end' => 4], // http
+                ['start' => 15, 'end' => 18], // fig
+                ['start' => 27, 'end' => 33], // "psr-2/"
+            ],
+            'tags' => [
+                ['start' => 0, 'end' => 12], // coding-style
+                ['start' => 23, 'end' => 30], // quality
+                ['start' => 31, 'end' => 40], // assurance
+            ],
+        ];
+        static::assertSame($expectedHighlights, $bookmark->getAdditionalContentEntry('search_highlight'));
+    }
 }
diff --git a/tests/bookmark/BookmarkInitializerTest.php b/tests/bookmark/BookmarkInitializerTest.php
index 25704004..0c8420ce 100644
--- a/tests/bookmark/BookmarkInitializerTest.php
+++ b/tests/bookmark/BookmarkInitializerTest.php
@@ -2,6 +2,7 @@
 
 namespace Shaarli\Bookmark;
 
+use malkusch\lock\mutex\NoMutex;
 use Shaarli\Config\ConfigManager;
 use Shaarli\History;
 use Shaarli\TestCase;
@@ -34,11 +35,15 @@ class BookmarkInitializerTest extends TestCase
     /** @var BookmarkInitializer instance */
     protected $initializer;
 
+    /** @var NoMutex */
+    protected $mutex;
+
     /**
      * Initialize an empty BookmarkFileService
      */
     public function setUp(): void
     {
+        $this->mutex = new NoMutex();
         if (file_exists(self::$testDatastore)) {
             unlink(self::$testDatastore);
         }
@@ -47,7 +52,7 @@ class BookmarkInitializerTest extends TestCase
         $this->conf = new ConfigManager(self::$testConf);
         $this->conf->set('resource.datastore', self::$testDatastore);
         $this->history = new History('sandbox/history.php');
-        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, true);
+        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
 
         $this->initializer = new BookmarkInitializer($this->bookmarkService);
     }
@@ -59,7 +64,7 @@ class BookmarkInitializerTest extends TestCase
     {
         $refDB = new \ReferenceLinkDB();
         $refDB->write(self::$testDatastore);
-        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, true);
+        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
         $this->initializer = new BookmarkInitializer($this->bookmarkService);
 
         $this->initializer->initialize();
@@ -90,7 +95,7 @@ class BookmarkInitializerTest extends TestCase
         $this->bookmarkService->save();
 
         // Reload from file
-        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, true);
+        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
         $this->assertEquals($refDB->countLinks() + 3, $this->bookmarkService->count());
 
         $bookmark = $this->bookmarkService->get(43);
@@ -121,7 +126,7 @@ class BookmarkInitializerTest extends TestCase
     public function testInitializeNonExistentDataStore(): void
     {
         $this->conf->set('resource.datastore', static::$testDatastore . '_empty');
-        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, true);
+        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, $this->mutex, true);
 
         $this->initializer->initialize();
 
diff --git a/tests/bookmark/BookmarkTest.php b/tests/bookmark/BookmarkTest.php
index afec2440..cb91b26b 100644
--- a/tests/bookmark/BookmarkTest.php
+++ b/tests/bookmark/BookmarkTest.php
@@ -79,6 +79,23 @@ class BookmarkTest extends TestCase
     }
 
     /**
+     * Test fromArray() with a link with a custom tags separator
+     */
+    public function testFromArrayCustomTagsSeparator()
+    {
+        $data = [
+            'id' => 1,
+            'tags' => ['tag1', 'tag2', 'chair'],
+        ];
+
+        $bookmark = (new Bookmark())->fromArray($data, '@');
+        $this->assertEquals($data['id'], $bookmark->getId());
+        $this->assertEquals($data['tags'], $bookmark->getTags());
+        $this->assertEquals('tag1@tag2@chair', $bookmark->getTagsString('@'));
+    }
+
+
+    /**
      * Test validate() with a valid minimal bookmark
      */
     public function testValidateValidFullBookmark()
@@ -154,25 +171,6 @@ class BookmarkTest extends TestCase
     }
 
     /**
-     * Test validate() with a a bookmark with a non integer ID.
-     */
-    public function testValidateNotValidStringId()
-    {
-        $bookmark = new Bookmark();
-        $bookmark->setId('str');
-        $bookmark->setShortUrl('abc');
-        $bookmark->setCreated(\DateTime::createFromFormat('Ymd_His', '20190514_200102'));
-        $exception = null;
-        try {
-            $bookmark->validate();
-        } catch (InvalidBookmarkException $e) {
-            $exception = $e;
-        }
-        $this->assertNotNull($exception);
-        $this->assertContainsPolyfill('- ID: str'. PHP_EOL, $exception->getMessage());
-    }
-
-    /**
      * Test validate() with a a bookmark without short url.
      */
     public function testValidateNotValidNoShortUrl()
@@ -211,25 +209,6 @@ class BookmarkTest extends TestCase
     }
 
     /**
-     * Test validate() with a a bookmark with a bad created datetime.
-     */
-    public function testValidateNotValidBadCreated()
-    {
-        $bookmark = new Bookmark();
-        $bookmark->setId(1);
-        $bookmark->setShortUrl('abc');
-        $bookmark->setCreated('hi!');
-        $exception = null;
-        try {
-            $bookmark->validate();
-        } catch (InvalidBookmarkException $e) {
-            $exception = $e;
-        }
-        $this->assertNotNull($exception);
-        $this->assertContainsPolyfill('- Created: Not a DateTime object'. PHP_EOL, $exception->getMessage());
-    }
-
-    /**
      * Test setId() and make sure that default fields are generated.
      */
     public function testSetIdEmptyGeneratedFields()
@@ -290,7 +269,7 @@ class BookmarkTest extends TestCase
     {
         $bookmark = new Bookmark();
 
-        $str = 'tag1    tag2 tag3.tag3-2, tag4   ,  -tag5   ';
+        $str = 'tag1    tag2 tag3.tag3-2 tag4     -tag5   ';
         $bookmark->setTagsString($str);
         $this->assertEquals(
             [
@@ -314,9 +293,9 @@ class BookmarkTest extends TestCase
         $array = [
             'tag1    ',
             '     tag2',
-            'tag3.tag3-2,',
-            ',  tag4',
-            ',  ',
+            'tag3.tag3-2',
+            '  tag4',
+            '  ',
             '-tag5   ',
         ];
         $bookmark->setTags($array);
@@ -385,4 +364,48 @@ class BookmarkTest extends TestCase
         $bookmark->deleteTag('nope');
         $this->assertEquals(['tag1', 'tag2', 'chair'], $bookmark->getTags());
     }
+
+    /**
+     * Test shouldUpdateThumbnail() with bookmarks needing an update.
+     */
+    public function testShouldUpdateThumbnail(): void
+    {
+        $bookmark = (new Bookmark())->setUrl('http://domain.tld/with-image');
+
+        static::assertTrue($bookmark->shouldUpdateThumbnail());
+
+        $bookmark = (new Bookmark())
+            ->setUrl('http://domain.tld/with-image')
+            ->setThumbnail('unknown file')
+        ;
+
+        static::assertTrue($bookmark->shouldUpdateThumbnail());
+    }
+
+    /**
+     * Test shouldUpdateThumbnail() with bookmarks that should not update.
+     */
+    public function testShouldNotUpdateThumbnail(): void
+    {
+        $bookmark = (new Bookmark());
+
+        static::assertFalse($bookmark->shouldUpdateThumbnail());
+
+        $bookmark = (new Bookmark())
+            ->setUrl('ftp://domain.tld/other-protocol', ['ftp'])
+        ;
+
+        static::assertFalse($bookmark->shouldUpdateThumbnail());
+
+        $bookmark = (new Bookmark())
+            ->setUrl('http://domain.tld/with-image')
+            ->setThumbnail(__FILE__)
+        ;
+
+        static::assertFalse($bookmark->shouldUpdateThumbnail());
+
+        $bookmark = (new Bookmark())->setUrl('/shaare/abcdef');
+
+        static::assertFalse($bookmark->shouldUpdateThumbnail());
+    }
 }
diff --git a/tests/bookmark/LinkUtilsTest.php b/tests/bookmark/LinkUtilsTest.php
index ef00b92f..ddab4e3c 100644
--- a/tests/bookmark/LinkUtilsTest.php
+++ b/tests/bookmark/LinkUtilsTest.php
@@ -94,8 +94,108 @@ class LinkUtilsTest extends TestCase
     public function testHtmlExtractExistentNameTag()
     {
         $description = 'Bob and Alice share cookies.';
+
+        // Simple one line
         $html = '<html><meta>stuff2</meta><meta name="description" content="' . $description . '"/></html>';
         $this->assertEquals($description, html_extract_tag('description', $html));
+
+        // Simple OpenGraph
+        $html = '<meta property="og:description" content="' . $description . '">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        // Simple reversed OpenGraph
+        $html = '<meta content="' . $description . '" property="og:description">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        // ItemProp OpenGraph
+        $html = '<meta itemprop="og:description" content="' . $description . '">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        // OpenGraph without quotes
+        $html = '<meta property=og:description content="' . $description . '">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        // OpenGraph reversed without quotes
+        $html = '<meta content="' . $description . '" property=og:description>';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        // OpenGraph with noise
+        $html = '<meta tag1="content1" property="og:description" tag2="content2" content="' .
+            $description . '" tag3="content3">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        // OpenGraph reversed with noise
+        $html = '<meta tag1="content1" content="' . $description . '" ' .
+            'tag3="content3" tag2="content2" property="og:description">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        // OpenGraph multiple properties start
+        $html = '<meta property="unrelated og:description" content="' . $description . '">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        // OpenGraph multiple properties end
+        $html = '<meta property="og:description unrelated" content="' . $description . '">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        // OpenGraph multiple properties both end
+        $html = '<meta property="og:unrelated1 og:description og:unrelated2" content="' . $description . '">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        // OpenGraph multiple properties both end with noise
+        $html = '<meta tag1="content1" property="og:unrelated1 og:description og:unrelated2" '.
+            'tag2="content2" content="' . $description . '" tag3="content3">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        // OpenGraph reversed multiple properties start
+        $html = '<meta content="' . $description . '" property="unrelated og:description">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        // OpenGraph reversed multiple properties end
+        $html = '<meta content="' . $description . '" property="og:description unrelated">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        // OpenGraph reversed multiple properties both end
+        $html = '<meta content="' . $description . '" property="og:unrelated1 og:description og:unrelated2">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        // OpenGraph reversed multiple properties both end with noise
+        $html = '<meta tag1="content1" content="' . $description . '" tag2="content2" '.
+            'property="og:unrelated1 og:description og:unrelated2" tag3="content3">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        // Suggestion from #1375
+        $html = '<meta property="og:description" name="description" content="' . $description . '">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+    }
+
+    /**
+     * Test html_extract_tag() with double quoted content containing single quote, and the opposite.
+     */
+    public function testHtmlExtractExistentNameTagWithMixedQuotes(): void
+    {
+        $description = 'Bob and Alice share M&M\'s.';
+
+        $html = '<meta property="og:description" content="' . $description . '">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        $html = '<meta tag1="content1" property="og:unrelated1 og:description og:unrelated2" '.
+            'tag2="content2" content="' . $description . '" tag3="content3">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        $html = '<meta property="og:description" name="description" content="' . $description . '">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        $description = 'Bob and Alice share "cookies".';
+
+        $html = '<meta property="og:description" content=\'' . $description . '\'>';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        $html = '<meta tag1="content1" property="og:unrelated1 og:description og:unrelated2" '.
+            'tag2="content2" content=\'' . $description . '\' tag3="content3">';
+        $this->assertEquals($description, html_extract_tag('description', $html));
+
+        $html = '<meta property="og:description" name="description" content=\'' . $description . '\'>';
+        $this->assertEquals($description, html_extract_tag('description', $html));
     }
 
     /**
@@ -105,6 +205,25 @@ class LinkUtilsTest extends TestCase
     {
         $html = '<html><meta>stuff2</meta><meta name="image" content="img"/></html>';
         $this->assertFalse(html_extract_tag('description', $html));
+
+        // Partial meta tag
+        $html = '<meta content="Brief description">';
+        $this->assertFalse(html_extract_tag('description', $html));
+
+        $html = '<meta property="og:description">';
+        $this->assertFalse(html_extract_tag('description', $html));
+
+        $html = '<meta tag1="content1" property="og:description">';
+        $this->assertFalse(html_extract_tag('description', $html));
+
+        $html = '<meta property="og:description" tag1="content1">';
+        $this->assertFalse(html_extract_tag('description', $html));
+
+        $html = '<meta tag1="content1" content="Brief description">';
+        $this->assertFalse(html_extract_tag('description', $html));
+
+        $html = '<meta content="Brief description" tag1="content1">';
+        $this->assertFalse(html_extract_tag('description', $html));
     }
 
     /**
@@ -127,60 +246,93 @@ class LinkUtilsTest extends TestCase
     }
 
     /**
+     * Test the header callback with valid value
+     */
+    public function testCurlHeaderCallbackOk(): void
+    {
+        $callback = get_curl_header_callback($charset, 'ut_curl_getinfo_ok');
+        $data = [
+            'HTTP/1.1 200 OK',
+            'Server: GitHub.com',
+            'Date: Sat, 28 Oct 2017 12:01:33 GMT',
+            'Content-Type: text/html; charset=utf-8',
+            'Status: 200 OK',
+        ];
+
+        foreach ($data as $chunk) {
+            static::assertIsInt($callback(null, $chunk));
+        }
+
+        static::assertSame('utf-8', $charset);
+    }
+
+    /**
      * Test the download callback with valid value
      */
-    public function testCurlDownloadCallbackOk()
+    public function testCurlDownloadCallbackOk(): void
     {
+        $charset = 'utf-8';
         $callback = get_curl_download_callback(
             $charset,
             $title,
             $desc,
             $keywords,
             false,
-            'ut_curl_getinfo_ok'
+            ' '
         );
+
         $data = [
-            'HTTP/1.1 200 OK',
-            'Server: GitHub.com',
-            'Date: Sat, 28 Oct 2017 12:01:33 GMT',
-            'Content-Type: text/html; charset=utf-8',
-            'Status: 200 OK',
-            'end' => 'th=device-width">'
+            'th=device-width">'
                 . '<title>Refactoring · GitHub</title>'
                 . '<link rel="search" type="application/opensea',
             '<title>ignored</title>'
                 . '<meta name="description" content="desc" />'
                 . '<meta name="keywords" content="key1,key2" />',
         ];
-        foreach ($data as $key => $line) {
-            $ignore = null;
-            $expected = $key !== 'end' ? strlen($line) : false;
-            $this->assertEquals($expected, $callback($ignore, $line));
-            if ($expected === false) {
-                break;
-            }
+
+        foreach ($data as $chunk) {
+            static::assertSame(strlen($chunk), $callback(null, $chunk));
         }
-        $this->assertEquals('utf-8', $charset);
-        $this->assertEquals('Refactoring · GitHub', $title);
-        $this->assertEmpty($desc);
-        $this->assertEmpty($keywords);
+
+        static::assertSame('utf-8', $charset);
+        static::assertSame('Refactoring · GitHub', $title);
+        static::assertEmpty($desc);
+        static::assertEmpty($keywords);
+    }
+
+    /**
+     * Test the header callback with valid value
+     */
+    public function testCurlHeaderCallbackNoCharset(): void
+    {
+        $callback = get_curl_header_callback($charset, 'ut_curl_getinfo_no_charset');
+        $data = [
+            'HTTP/1.1 200 OK',
+        ];
+
+        foreach ($data as $chunk) {
+            static::assertSame(strlen($chunk), $callback(null, $chunk));
+        }
+
+        static::assertFalse($charset);
     }
 
     /**
      * Test the download callback with valid values and no charset
      */
-    public function testCurlDownloadCallbackOkNoCharset()
+    public function testCurlDownloadCallbackOkNoCharset(): void
     {
+        $charset = null;
         $callback = get_curl_download_callback(
             $charset,
             $title,
             $desc,
             $keywords,
             false,
-            'ut_curl_getinfo_no_charset'
+            ' '
         );
+
         $data = [
-            'HTTP/1.1 200 OK',
             'end' => 'th=device-width">'
                 . '<title>Refactoring · GitHub</title>'
                 . '<link rel="search" type="application/opensea',
@@ -188,10 +340,11 @@ class LinkUtilsTest extends TestCase
             . '<meta name="description" content="desc" />'
             . '<meta name="keywords" content="key1,key2" />',
         ];
-        foreach ($data as $key => $line) {
-            $ignore = null;
-            $this->assertEquals(strlen($line), $callback($ignore, $line));
+
+        foreach ($data as $chunk) {
+            static::assertSame(strlen($chunk), $callback(null, $chunk));
         }
+
         $this->assertEmpty($charset);
         $this->assertEquals('Refactoring · GitHub', $title);
         $this->assertEmpty($desc);
@@ -201,18 +354,19 @@ class LinkUtilsTest extends TestCase
     /**
      * Test the download callback with valid values and no charset
      */
-    public function testCurlDownloadCallbackOkHtmlCharset()
+    public function testCurlDownloadCallbackOkHtmlCharset(): void
     {
+        $charset = null;
         $callback = get_curl_download_callback(
             $charset,
             $title,
             $desc,
             $keywords,
             false,
-            'ut_curl_getinfo_no_charset'
+            ' '
         );
+
         $data = [
-            'HTTP/1.1 200 OK',
             '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />',
             'end' => 'th=device-width">'
                 . '<title>Refactoring · GitHub</title>'
@@ -221,14 +375,10 @@ class LinkUtilsTest extends TestCase
             . '<meta name="description" content="desc" />'
             . '<meta name="keywords" content="key1,key2" />',
         ];
-        foreach ($data as $key => $line) {
-            $ignore = null;
-            $expected = $key !== 'end' ? strlen($line) : false;
-            $this->assertEquals($expected, $callback($ignore, $line));
-            if ($expected === false) {
-                break;
-            }
+        foreach ($data as $chunk) {
+            static::assertSame(strlen($chunk), $callback(null, $chunk));
         }
+
         $this->assertEquals('utf-8', $charset);
         $this->assertEquals('Refactoring · GitHub', $title);
         $this->assertEmpty($desc);
@@ -238,25 +388,27 @@ class LinkUtilsTest extends TestCase
     /**
      * Test the download callback with valid values and no title
      */
-    public function testCurlDownloadCallbackOkNoTitle()
+    public function testCurlDownloadCallbackOkNoTitle(): void
     {
+        $charset = 'utf-8';
         $callback = get_curl_download_callback(
             $charset,
             $title,
             $desc,
             $keywords,
             false,
-            'ut_curl_getinfo_ok'
+            ' '
         );
+
         $data = [
-            'HTTP/1.1 200 OK',
             'end' => 'th=device-width">Refactoring · GitHub<link rel="search" type="application/opensea',
             'ignored',
         ];
-        foreach ($data as $key => $line) {
-            $ignore = null;
-            $this->assertEquals(strlen($line), $callback($ignore, $line));
+
+        foreach ($data as $chunk) {
+            static::assertSame(strlen($chunk), $callback(null, $chunk));
         }
+
         $this->assertEquals('utf-8', $charset);
         $this->assertEmpty($title);
         $this->assertEmpty($desc);
@@ -264,81 +416,56 @@ class LinkUtilsTest extends TestCase
     }
 
     /**
-     * Test the download callback with an invalid content type.
+     * Test the header callback with an invalid content type.
      */
-    public function testCurlDownloadCallbackInvalidContentType()
+    public function testCurlHeaderCallbackInvalidContentType(): void
     {
-        $callback = get_curl_download_callback(
-            $charset,
-            $title,
-            $desc,
-            $keywords,
-            false,
-            'ut_curl_getinfo_ct_ko'
-        );
-        $ignore = null;
-        $this->assertFalse($callback($ignore, ''));
-        $this->assertEmpty($charset);
-        $this->assertEmpty($title);
+        $callback = get_curl_header_callback($charset, 'ut_curl_getinfo_ct_ko');
+        $data = [
+            'HTTP/1.1 200 OK',
+        ];
+
+        static::assertFalse($callback(null, $data[0]));
+        static::assertNull($charset);
     }
 
     /**
-     * Test the download callback with an invalid response code.
+     * Test the header callback with an invalid response code.
      */
-    public function testCurlDownloadCallbackInvalidResponseCode()
+    public function testCurlHeaderCallbackInvalidResponseCode(): void
     {
-        $callback = $callback = get_curl_download_callback(
-            $charset,
-            $title,
-            $desc,
-            $keywords,
-            false,
-            'ut_curl_getinfo_rc_ko'
-        );
-        $ignore = null;
-        $this->assertFalse($callback($ignore, ''));
-        $this->assertEmpty($charset);
-        $this->assertEmpty($title);
+        $callback = get_curl_header_callback($charset, 'ut_curl_getinfo_rc_ko');
+
+        static::assertFalse($callback(null, ''));
+        static::assertNull($charset);
     }
 
     /**
-     * Test the download callback with an invalid content type and response code.
+     * Test the header callback with an invalid content type and response code.
      */
-    public function testCurlDownloadCallbackInvalidContentTypeAndResponseCode()
+    public function testCurlHeaderCallbackInvalidContentTypeAndResponseCode(): void
     {
-        $callback = $callback = get_curl_download_callback(
-            $charset,
-            $title,
-            $desc,
-            $keywords,
-            false,
-            'ut_curl_getinfo_rs_ct_ko'
-        );
-        $ignore = null;
-        $this->assertFalse($callback($ignore, ''));
-        $this->assertEmpty($charset);
-        $this->assertEmpty($title);
+        $callback = get_curl_header_callback($charset, 'ut_curl_getinfo_rs_ct_ko');
+
+        static::assertFalse($callback(null, ''));
+        static::assertNull($charset);
     }
 
     /**
      * Test the download callback with valid value, and retrieve_description option enabled.
      */
-    public function testCurlDownloadCallbackOkWithDesc()
+    public function testCurlDownloadCallbackOkWithDesc(): void
     {
+        $charset = 'utf-8';
         $callback = get_curl_download_callback(
             $charset,
             $title,
             $desc,
             $keywords,
             true,
-            'ut_curl_getinfo_ok'
+            ' '
         );
         $data = [
-            'HTTP/1.1 200 OK',
-            'Server: GitHub.com',
-            'Date: Sat, 28 Oct 2017 12:01:33 GMT',
-            'Content-Type: text/html; charset=utf-8',
-            'Status: 200 OK',
             'th=device-width">'
                 . '<title>Refactoring · GitHub</title>'
                 . '<link rel="search" type="application/opensea',
@@ -346,14 +473,11 @@ class LinkUtilsTest extends TestCase
             . '<meta name="description" content="link desc" />'
             . '<meta name="keywords" content="key1,key2" />',
         ];
-        foreach ($data as $key => $line) {
-            $ignore = null;
-            $expected = $key !== 'end' ? strlen($line) : false;
-            $this->assertEquals($expected, $callback($ignore, $line));
-            if ($expected === false) {
-                break;
-            }
+
+        foreach ($data as $chunk) {
+            static::assertSame(strlen($chunk), $callback(null, $chunk));
         }
+
         $this->assertEquals('utf-8', $charset);
         $this->assertEquals('Refactoring · GitHub', $title);
         $this->assertEquals('link desc', $desc);
@@ -364,8 +488,9 @@ class LinkUtilsTest extends TestCase
      * Test the download callback with valid value, and retrieve_description option enabled,
      * but no desc or keyword defined in the page.
      */
-    public function testCurlDownloadCallbackOkWithDescNotFound()
+    public function testCurlDownloadCallbackOkWithDescNotFound(): void
     {
+        $charset = 'utf-8';
         $callback = get_curl_download_callback(
             $charset,
             $title,
@@ -375,24 +500,16 @@ class LinkUtilsTest extends TestCase
             'ut_curl_getinfo_ok'
         );
         $data = [
-            'HTTP/1.1 200 OK',
-            'Server: GitHub.com',
-            'Date: Sat, 28 Oct 2017 12:01:33 GMT',
-            'Content-Type: text/html; charset=utf-8',
-            'Status: 200 OK',
             'th=device-width">'
                 . '<title>Refactoring · GitHub</title>'
                 . '<link rel="search" type="application/opensea',
             'end' => '<title>ignored</title>',
         ];
-        foreach ($data as $key => $line) {
-            $ignore = null;
-            $expected = $key !== 'end' ? strlen($line) : false;
-            $this->assertEquals($expected, $callback($ignore, $line));
-            if ($expected === false) {
-                break;
-            }
+
+        foreach ($data as $chunk) {
+            static::assertSame(strlen($chunk), $callback(null, $chunk));
         }
+
         $this->assertEquals('utf-8', $charset);
         $this->assertEquals('Refactoring · GitHub', $title);
         $this->assertEmpty($desc);
@@ -493,6 +610,115 @@ class LinkUtilsTest extends TestCase
     }
 
     /**
+     * Test tags_str2array with whitespace separator.
+     */
+    public function testTagsStr2ArrayWithSpaceSeparator(): void
+    {
+        $separator = ' ';
+
+        static::assertSame(['tag1', 'tag2', 'tag3'], tags_str2array('tag1 tag2 tag3', $separator));
+        static::assertSame(['tag1', 'tag2', 'tag3'], tags_str2array('tag1  tag2     tag3', $separator));
+        static::assertSame(['tag1', 'tag2', 'tag3'], tags_str2array('   tag1  tag2     tag3   ', $separator));
+        static::assertSame(['tag1@', 'tag2,', '.tag3'], tags_str2array('   tag1@  tag2,     .tag3   ', $separator));
+        static::assertSame([], tags_str2array('', $separator));
+        static::assertSame([], tags_str2array('   ', $separator));
+        static::assertSame([], tags_str2array(null, $separator));
+    }
+
+    /**
+     * Test tags_str2array with @ separator.
+     */
+    public function testTagsStr2ArrayWithCharSeparator(): void
+    {
+        $separator = '@';
+
+        static::assertSame(['tag1', 'tag2', 'tag3'], tags_str2array('tag1@tag2@tag3', $separator));
+        static::assertSame(['tag1', 'tag2', 'tag3'], tags_str2array('tag1@@@@tag2@@@@tag3', $separator));
+        static::assertSame(['tag1', 'tag2', 'tag3'], tags_str2array('@@@tag1@@@tag2@@@@tag3@@', $separator));
+        static::assertSame(
+            ['tag1#', 'tag2, and other', '.tag3'],
+            tags_str2array('@@@   tag1#     @@@ tag2, and other @@@@.tag3@@', $separator)
+        );
+        static::assertSame([], tags_str2array('', $separator));
+        static::assertSame([], tags_str2array('   ', $separator));
+        static::assertSame([], tags_str2array(null, $separator));
+    }
+
+    /**
+     * Test tags_array2str with ' ' separator.
+     */
+    public function testTagsArray2StrWithSpaceSeparator(): void
+    {
+        $separator = ' ';
+
+        static::assertSame('tag1 tag2 tag3', tags_array2str(['tag1', 'tag2', 'tag3'], $separator));
+        static::assertSame('tag1, tag2@ tag3', tags_array2str(['tag1,', 'tag2@', 'tag3'], $separator));
+        static::assertSame('tag1 tag2 tag3', tags_array2str(['   tag1   ', 'tag2', 'tag3   '], $separator));
+        static::assertSame('tag1 tag2 tag3', tags_array2str(['   tag1   ', ' ', 'tag2', '   ', 'tag3   '], $separator));
+        static::assertSame('tag1', tags_array2str(['   tag1   '], $separator));
+        static::assertSame('', tags_array2str(['  '], $separator));
+        static::assertSame('', tags_array2str([], $separator));
+        static::assertSame('', tags_array2str(null, $separator));
+    }
+
+    /**
+     * Test tags_array2str with @ separator.
+     */
+    public function testTagsArray2StrWithCharSeparator(): void
+    {
+        $separator = '@';
+
+        static::assertSame('tag1@tag2@tag3', tags_array2str(['tag1', 'tag2', 'tag3'], $separator));
+        static::assertSame('tag1,@tag2@tag3', tags_array2str(['tag1,', 'tag2@', 'tag3'], $separator));
+        static::assertSame(
+            'tag1@tag2, and other@tag3',
+            tags_array2str(['@@@@ tag1@@@', ' @tag2, and other @', 'tag3@@@@'], $separator)
+        );
+        static::assertSame('tag1@tag2@tag3', tags_array2str(['@@@tag1@@@', '@', 'tag2', '@@@', 'tag3@@@'], $separator));
+        static::assertSame('tag1', tags_array2str(['@@@@tag1@@@@'], $separator));
+        static::assertSame('', tags_array2str(['@@@'], $separator));
+        static::assertSame('', tags_array2str([], $separator));
+        static::assertSame('', tags_array2str(null, $separator));
+    }
+
+    /**
+     * Test tags_array2str with @ separator.
+     */
+    public function testTagsFilterWithSpaceSeparator(): void
+    {
+        $separator = ' ';
+
+        static::assertSame(['tag1', 'tag2', 'tag3'], tags_filter(['tag1', 'tag2', 'tag3'], $separator));
+        static::assertSame(['tag1,', 'tag2@', 'tag3'], tags_filter(['tag1,', 'tag2@', 'tag3'], $separator));
+        static::assertSame(['tag1', 'tag2', 'tag3'], tags_filter(['   tag1   ', 'tag2', 'tag3   '], $separator));
+        static::assertSame(['tag1', 'tag2', 'tag3'], tags_filter(['   tag1   ', ' ', 'tag2', '   ', 'tag3   '], $separator));
+        static::assertSame(['tag1'], tags_filter(['   tag1   '], $separator));
+        static::assertSame([], tags_filter(['  '], $separator));
+        static::assertSame([], tags_filter([], $separator));
+        static::assertSame([], tags_filter(null, $separator));
+    }
+
+    /**
+     * Test tags_array2str with @ separator.
+     */
+    public function testTagsArrayFilterWithSpaceSeparator(): void
+    {
+        $separator = '@';
+
+        static::assertSame(['tag1', 'tag2', 'tag3'], tags_filter(['tag1', 'tag2', 'tag3'], $separator));
+        static::assertSame(['tag1,', 'tag2#', 'tag3'], tags_filter(['tag1,', 'tag2#', 'tag3'], $separator));
+        static::assertSame(
+            ['tag1', 'tag2, and other', 'tag3'],
+            tags_filter(['@@@@ tag1@@@', ' @tag2, and other @', 'tag3@@@@'], $separator)
+        );
+        static::assertSame(['tag1', 'tag2', 'tag3'], tags_filter(['@@@tag1@@@', '@', 'tag2', '@@@', 'tag3@@@'], $separator));
+        static::assertSame(['tag1'], tags_filter(['@@@@tag1@@@@'], $separator));
+        static::assertSame([], tags_filter(['@@@'], $separator));
+        static::assertSame([], tags_filter([], $separator));
+        static::assertSame([], tags_filter(null, $separator));
+    }
+
+    /**
      * Util function to build an hashtag link.
      *
      * @param string $hashtag Hashtag name.
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 2d675c9a..3508a7b1 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -30,3 +30,7 @@ require_once 'tests/utils/ReferenceLinkDB.php';
 require_once 'tests/utils/ReferenceSessionIdHashes.php';
 
 \ReferenceSessionIdHashes::genAllHashes();
+
+if (!defined('SHAARLI_MUTEX_FILE')) {
+    define('SHAARLI_MUTEX_FILE', __FILE__);
+}
diff --git a/tests/container/ContainerBuilderTest.php b/tests/container/ContainerBuilderTest.php
index 5d52daef..3d43c344 100644
--- a/tests/container/ContainerBuilderTest.php
+++ b/tests/container/ContainerBuilderTest.php
@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace Shaarli\Container;
 
+use Psr\Log\LoggerInterface;
 use Shaarli\Bookmark\BookmarkServiceInterface;
 use Shaarli\Config\ConfigManager;
 use Shaarli\Feed\FeedBuilder;
@@ -12,6 +13,7 @@ use Shaarli\Front\Controller\Visitor\ErrorController;
 use Shaarli\Front\Controller\Visitor\ErrorNotFoundController;
 use Shaarli\History;
 use Shaarli\Http\HttpAccess;
+use Shaarli\Http\MetadataRetriever;
 use Shaarli\Netscape\NetscapeBookmarkUtils;
 use Shaarli\Plugin\PluginManager;
 use Shaarli\Render\PageBuilder;
@@ -54,7 +56,8 @@ class ContainerBuilderTest extends TestCase
             $this->conf,
             $this->sessionManager,
             $this->cookieManager,
-            $this->loginManager
+            $this->loginManager,
+            $this->createMock(LoggerInterface::class)
         );
     }
 
@@ -72,6 +75,8 @@ class ContainerBuilderTest extends TestCase
         static::assertInstanceOf(History::class, $container->history);
         static::assertInstanceOf(HttpAccess::class, $container->httpAccess);
         static::assertInstanceOf(LoginManager::class, $container->loginManager);
+        static::assertInstanceOf(LoggerInterface::class, $container->logger);
+        static::assertInstanceOf(MetadataRetriever::class, $container->metadataRetriever);
         static::assertInstanceOf(NetscapeBookmarkUtils::class, $container->netscapeBookmarkUtils);
         static::assertInstanceOf(PageBuilder::class, $container->pageBuilder);
         static::assertInstanceOf(PageCacheManager::class, $container->pageCacheManager);
diff --git a/tests/feed/FeedBuilderTest.php b/tests/feed/FeedBuilderTest.php
index c29e8ef3..6b9204eb 100644
--- a/tests/feed/FeedBuilderTest.php
+++ b/tests/feed/FeedBuilderTest.php
@@ -3,6 +3,7 @@
 namespace Shaarli\Feed;
 
 use DateTime;
+use malkusch\lock\mutex\NoMutex;
 use ReferenceLinkDB;
 use Shaarli\Bookmark\Bookmark;
 use Shaarli\Bookmark\BookmarkFileService;
@@ -47,6 +48,7 @@ class FeedBuilderTest extends TestCase
      */
     public static function setUpBeforeClass(): void
     {
+        $mutex = new NoMutex();
         $conf = new ConfigManager('tests/utils/config/configJson');
         $conf->set('resource.datastore', self::$testDatastore);
         $refLinkDB = new \ReferenceLinkDB();
@@ -54,7 +56,7 @@ class FeedBuilderTest extends TestCase
         $history = new History('sandbox/history.php');
         $factory = new FormatterFactory($conf, true);
         self::$formatter = $factory->getFormatter();
-        self::$bookmarkService = new BookmarkFileService($conf, $history, true);
+        self::$bookmarkService = new BookmarkFileService($conf, $history, $mutex, true);
 
         self::$serverInfo = array(
             'HTTPS' => 'Off',
diff --git a/tests/formatter/BookmarkDefaultFormatterTest.php b/tests/formatter/BookmarkDefaultFormatterTest.php
index 9534436e..4fcc5dd1 100644
--- a/tests/formatter/BookmarkDefaultFormatterTest.php
+++ b/tests/formatter/BookmarkDefaultFormatterTest.php
@@ -174,4 +174,139 @@ class BookmarkDefaultFormatterTest extends TestCase
         $this->assertSame($tags, $link['taglist']);
         $this->assertSame(implode(' ', $tags), $link['tags']);
     }
+
+    /**
+     * Test formatTitleHtml with search result highlight.
+     */
+    public function testFormatTitleHtmlWithSearchHighlight(): void
+    {
+        $this->formatter = new BookmarkDefaultFormatter($this->conf, false);
+
+        $bookmark = new Bookmark();
+        $bookmark->setTitle('PSR-2: Coding Style Guide');
+        $bookmark->addAdditionalContentEntry(
+            'search_highlight',
+            ['title' => [
+                ['start' => 0, 'end' => 5], // "psr-2"
+                ['start' => 7, 'end' => 13], // coding
+                ['start' => 20, 'end' => 25], // guide
+            ]]
+        );
+
+        $link = $this->formatter->format($bookmark);
+
+        $this->assertSame(
+            '<span class="search-highlight">PSR-2</span>: ' .
+            '<span class="search-highlight">Coding</span> Style ' .
+            '<span class="search-highlight">Guide</span>',
+            $link['title_html']
+        );
+    }
+
+    /**
+     * Test formatDescription with search result highlight.
+     */
+    public function testFormatDescriptionWithSearchHighlight(): void
+    {
+        $this->formatter = new BookmarkDefaultFormatter($this->conf, false);
+
+        $bookmark = new Bookmark();
+        $bookmark->setDescription('This guide extends and expands on PSR-1, the basic coding standard.');
+        $bookmark->addAdditionalContentEntry(
+            'search_highlight',
+            ['description' => [
+                ['start' => 0, 'end' => 10], // "This guide"
+                ['start' => 45, 'end' => 50], // basic
+                ['start' => 58, 'end' => 67], // standard.
+            ]]
+        );
+
+        $link = $this->formatter->format($bookmark);
+
+        $this->assertSame(
+            '<span class="search-highlight">This guide</span> extends and expands on PSR-1, the ' .
+            '<span class="search-highlight">basic</span> coding ' .
+            '<span class="search-highlight">standard.</span>',
+            $link['description']
+        );
+    }
+
+    /**
+     * Test formatUrlHtml with search result highlight.
+     */
+    public function testFormatUrlHtmlWithSearchHighlight(): void
+    {
+        $this->formatter = new BookmarkDefaultFormatter($this->conf, false);
+
+        $bookmark = new Bookmark();
+        $bookmark->setUrl('http://www.php-fig.org/psr/psr-2/');
+        $bookmark->addAdditionalContentEntry(
+            'search_highlight',
+            ['url' => [
+                ['start' => 0, 'end' => 4], // http
+                ['start' => 15, 'end' => 18], // fig
+                ['start' => 27, 'end' => 33], // "psr-2/"
+            ]]
+        );
+
+        $link = $this->formatter->format($bookmark);
+
+        $this->assertSame(
+            '<span class="search-highlight">http</span>://www.php-' .
+            '<span class="search-highlight">fig</span>.org/psr/' .
+            '<span class="search-highlight">psr-2/</span>',
+            $link['url_html']
+        );
+    }
+
+    /**
+     * Test formatTagListHtml with search result highlight.
+     */
+    public function testFormatTagListHtmlWithSearchHighlight(): void
+    {
+        $this->formatter = new BookmarkDefaultFormatter($this->conf, false);
+
+        $bookmark = new Bookmark();
+        $bookmark->setTagsString('coding-style standards quality assurance');
+        $bookmark->addAdditionalContentEntry(
+            'search_highlight',
+            ['tags' => [
+                ['start' => 0, 'end' => 12], // coding-style
+                ['start' => 23, 'end' => 30], // quality
+                ['start' => 31, 'end' => 40], // assurance
+            ],]
+        );
+
+        $link = $this->formatter->format($bookmark);
+
+        $this->assertSame(
+            [
+                '<span class="search-highlight">coding-style</span>',
+                'standards',
+                '<span class="search-highlight">quality</span>',
+                '<span class="search-highlight">assurance</span>',
+            ],
+            $link['taglist_html']
+        );
+    }
+
+    /**
+     * Test default formatting with formatter_settings.autolink set to false:
+     *   URLs and hashtags should not be transformed
+     */
+    public function testFormatDescriptionWithoutLinkification(): void
+    {
+        $this->conf->set('formatter_settings.autolink', false);
+        $this->formatter = new BookmarkDefaultFormatter($this->conf, false);
+
+        $bookmark = new Bookmark();
+        $bookmark->setDescription('Hi!' . PHP_EOL . 'https://thisisaurl.tld  #hashtag');
+
+        $link = $this->formatter->format($bookmark);
+
+        static::assertSame(
+            'Hi!<br />' . PHP_EOL . 'https://thisisaurl.tld &nbsp;#hashtag',
+            $link['description']
+        );
+    }
 }
diff --git a/tests/formatter/BookmarkMarkdownExtraFormatterTest.php b/tests/formatter/BookmarkMarkdownExtraFormatterTest.php
new file mode 100644
index 00000000..d4941ef3
--- /dev/null
+++ b/tests/formatter/BookmarkMarkdownExtraFormatterTest.php
@@ -0,0 +1,162 @@
+<?php
+
+namespace Shaarli\Formatter;
+
+use DateTime;
+use PHPUnit\Framework\TestCase;
+use Shaarli\Bookmark\Bookmark;
+use Shaarli\Config\ConfigManager;
+
+/**
+ * Class BookmarkMarkdownExtraFormatterTest
+ * @package Shaarli\Formatter
+ */
+class BookmarkMarkdownExtraFormatterTest extends TestCase
+{
+    /** @var string Path of test config file */
+    protected static $testConf = 'sandbox/config';
+
+    /** @var BookmarkFormatter */
+    protected $formatter;
+
+    /** @var ConfigManager instance */
+    protected $conf;
+
+    /**
+     * Initialize formatter instance.
+     */
+    public function setUp(): void
+    {
+        copy('tests/utils/config/configJson.json.php', self::$testConf .'.json.php');
+        $this->conf = new ConfigManager(self::$testConf);
+        $this->formatter = new BookmarkMarkdownExtraFormatter($this->conf, true);
+    }
+
+    /**
+     * Test formatting a bookmark with all its attribute filled.
+     */
+    public function testFormatExtra(): void
+    {
+        $bookmark = new Bookmark();
+        $bookmark->setId($id = 11);
+        $bookmark->setShortUrl($short = 'abcdef');
+        $bookmark->setUrl('https://sub.domain.tld?query=here&for=real#hash');
+        $bookmark->setTitle($title = 'This is a <strong>bookmark</strong>');
+        $bookmark->setDescription('<h2>Content</h2><p>`Here is some content</p>');
+        $bookmark->setTags($tags = ['tag1', 'bookmark', 'other', '<script>alert("xss");</script>']);
+        $bookmark->setThumbnail('http://domain2.tdl2/?type=img&name=file.png');
+        $bookmark->setSticky(true);
+        $bookmark->setCreated($created = DateTime::createFromFormat('Ymd_His', '20190521_190412'));
+        $bookmark->setUpdated($updated = DateTime::createFromFormat('Ymd_His', '20190521_191213'));
+        $bookmark->setPrivate(true);
+
+        $link = $this->formatter->format($bookmark);
+        $this->assertEquals($id, $link['id']);
+        $this->assertEquals($short, $link['shorturl']);
+        $this->assertEquals('https://sub.domain.tld?query=here&amp;for=real#hash', $link['url']);
+        $this->assertEquals(
+            'https://sub.domain.tld?query=here&amp;for=real#hash',
+            $link['real_url']
+        );
+        $this->assertEquals('This is a &lt;strong&gt;bookmark&lt;/strong&gt;', $link['title']);
+        $this->assertEquals(
+            '<div class="markdown"><p>'.
+                '&lt;h2&gt;Content&lt;/h2&gt;&lt;p&gt;`Here is some content&lt;/p&gt;'.
+            '</p></div>',
+            $link['description']
+        );
+        $tags[3] = '&lt;script&gt;alert(&quot;xss&quot;);&lt;/script&gt;';
+        $this->assertEquals($tags, $link['taglist']);
+        $this->assertEquals(implode(' ', $tags), $link['tags']);
+        $this->assertEquals(
+            'http://domain2.tdl2/?type=img&amp;name=file.png',
+            $link['thumbnail']
+        );
+        $this->assertEquals($created, $link['created']);
+        $this->assertEquals($created->getTimestamp(), $link['timestamp']);
+        $this->assertEquals($updated, $link['updated']);
+        $this->assertEquals($updated->getTimestamp(), $link['updated_timestamp']);
+        $this->assertTrue($link['private']);
+        $this->assertTrue($link['sticky']);
+        $this->assertEquals('private', $link['class']);
+    }
+
+    /**
+     * Test formatting a bookmark with all its attribute filled.
+     */
+    public function testFormatExtraMinimal(): void
+    {
+        $bookmark = new Bookmark();
+
+        $link = $this->formatter->format($bookmark);
+        $this->assertEmpty($link['id']);
+        $this->assertEmpty($link['shorturl']);
+        $this->assertEmpty($link['url']);
+        $this->assertEmpty($link['real_url']);
+        $this->assertEmpty($link['title']);
+        $this->assertEmpty($link['description']);
+        $this->assertEmpty($link['taglist']);
+        $this->assertEmpty($link['tags']);
+        $this->assertEmpty($link['thumbnail']);
+        $this->assertEmpty($link['created']);
+        $this->assertEmpty($link['timestamp']);
+        $this->assertEmpty($link['updated']);
+        $this->assertEmpty($link['updated_timestamp']);
+        $this->assertFalse($link['private']);
+        $this->assertFalse($link['sticky']);
+        $this->assertEmpty($link['class']);
+    }
+
+    /**
+     * Make sure that the description is properly formatted by the default formatter.
+     */
+    public function testFormatExtrraDescription(): void
+    {
+        $description = 'This a <strong>description</strong>'. PHP_EOL;
+        $description .= 'text https://sub.domain.tld?query=here&for=real#hash more text'. PHP_EOL;
+        $description .= 'Also, there is an #hashtag added'. PHP_EOL;
+        $description .= '    A  N  D KEEP     SPACES    !   '. PHP_EOL;
+        $description .= '# Header {.class}'. PHP_EOL;
+
+        $bookmark = new Bookmark();
+        $bookmark->setDescription($description);
+        $link = $this->formatter->format($bookmark);
+
+        $description = '<div class="markdown"><p>';
+        $description .= 'This a &lt;strong&gt;description&lt;/strong&gt;<br />'. PHP_EOL;
+        $url = 'https://sub.domain.tld?query=here&amp;for=real#hash';
+        $description .= 'text <a href="'. $url .'">'. $url .'</a> more text<br />'. PHP_EOL;
+        $description .= 'Also, there is an <a href="./add-tag/hashtag">#hashtag</a> added<br />'. PHP_EOL;
+        $description .= 'A  N  D KEEP     SPACES    !   </p>' . PHP_EOL;
+        $description .= '<h1 class="class">Header</h1>';
+        $description .= '</div>';
+
+        $this->assertEquals($description, $link['description']);
+    }
+
+    /**
+     * Test formatting URL with an index_url set
+     * It should prepend relative links.
+     */
+    public function testFormatExtraNoteWithIndexUrl(): void
+    {
+        $bookmark = new Bookmark();
+        $bookmark->setUrl($short = '?abcdef');
+        $description = 'Text #hashtag more text';
+        $bookmark->setDescription($description);
+
+        $this->formatter->addContextData('index_url', $root = 'https://domain.tld/hithere/');
+
+        $description = '<div class="markdown"><p>';
+        $description .= 'Text <a href="'. $root .'./add-tag/hashtag">#hashtag</a> more text';
+        $description .= '</p></div>';
+
+        $link = $this->formatter->format($bookmark);
+        $this->assertEquals($root . $short, $link['url']);
+        $this->assertEquals($root . $short, $link['real_url']);
+        $this->assertEquals(
+            $description,
+            $link['description']
+        );
+    }
+}
diff --git a/tests/front/controller/admin/ConfigureControllerTest.php b/tests/front/controller/admin/ConfigureControllerTest.php
index aca6cff3..d82db0a7 100644
--- a/tests/front/controller/admin/ConfigureControllerTest.php
+++ b/tests/front/controller/admin/ConfigureControllerTest.php
@@ -51,7 +51,7 @@ class ConfigureControllerTest extends TestCase
         static::assertSame('general.title', $assignedVariables['title']);
         static::assertSame('resource.theme', $assignedVariables['theme']);
         static::assertEmpty($assignedVariables['theme_available']);
-        static::assertSame(['default', 'markdown'], $assignedVariables['formatter_available']);
+        static::assertSame(['default', 'markdown', 'markdownExtra'], $assignedVariables['formatter_available']);
         static::assertNotEmpty($assignedVariables['continents']);
         static::assertNotEmpty($assignedVariables['cities']);
         static::assertSame('general.retrieve_description', $assignedVariables['retrieve_description']);
diff --git a/tests/front/controller/admin/ManageShaareControllerTest/AddShaareTest.php b/tests/front/controller/admin/ManageShaareControllerTest/AddShaareTest.php
deleted file mode 100644
index 0f27ec2f..00000000
--- a/tests/front/controller/admin/ManageShaareControllerTest/AddShaareTest.php
+++ /dev/null
@@ -1,47 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Shaarli\Front\Controller\Admin\ManageShaareControllerTest;
-
-use Shaarli\Front\Controller\Admin\FrontAdminControllerMockHelper;
-use Shaarli\Front\Controller\Admin\ManageShaareController;
-use Shaarli\Http\HttpAccess;
-use Shaarli\TestCase;
-use Slim\Http\Request;
-use Slim\Http\Response;
-
-class AddShaareTest extends TestCase
-{
-    use FrontAdminControllerMockHelper;
-
-    /** @var ManageShaareController */
-    protected $controller;
-
-    public function setUp(): void
-    {
-        $this->createContainer();
-
-        $this->container->httpAccess = $this->createMock(HttpAccess::class);
-        $this->controller = new ManageShaareController($this->container);
-    }
-
-    /**
-     * Test displaying add link page
-     */
-    public function testAddShaare(): void
-    {
-        $assignedVariables = [];
-        $this->assignTemplateVars($assignedVariables);
-
-        $request = $this->createMock(Request::class);
-        $response = new Response();
-
-        $result = $this->controller->addShaare($request, $response);
-
-        static::assertSame(200, $result->getStatusCode());
-        static::assertSame('addlink', (string) $result->getBody());
-
-        static::assertSame('Shaare a new link - Shaarli', $assignedVariables['pagetitle']);
-    }
-}
diff --git a/tests/front/controller/admin/ManageTagControllerTest.php b/tests/front/controller/admin/ManageTagControllerTest.php
index 8a0ff7a9..af6f273f 100644
--- a/tests/front/controller/admin/ManageTagControllerTest.php
+++ b/tests/front/controller/admin/ManageTagControllerTest.php
@@ -6,6 +6,7 @@ namespace Shaarli\Front\Controller\Admin;
 
 use Shaarli\Bookmark\Bookmark;
 use Shaarli\Bookmark\BookmarkFilter;
+use Shaarli\Config\ConfigManager;
 use Shaarli\Front\Exception\WrongTokenException;
 use Shaarli\Security\SessionManager;
 use Shaarli\TestCase;
@@ -44,10 +45,33 @@ class ManageTagControllerTest extends TestCase
         static::assertSame('changetag', (string) $result->getBody());
 
         static::assertSame('fromtag', $assignedVariables['fromtag']);
+        static::assertSame('@', $assignedVariables['tags_separator']);
         static::assertSame('Manage tags - Shaarli', $assignedVariables['pagetitle']);
     }
 
     /**
+     * Test displaying manage tag page
+     */
+    public function testIndexWhitespaceSeparator(): void
+    {
+        $assignedVariables = [];
+        $this->assignTemplateVars($assignedVariables);
+
+        $this->container->conf = $this->createMock(ConfigManager::class);
+        $this->container->conf->method('get')->willReturnCallback(function (string $key) {
+            return $key === 'general.tags_separator' ? ' ' : $key;
+        });
+
+        $request = $this->createMock(Request::class);
+        $response = new Response();
+
+        $this->controller->index($request, $response);
+
+        static::assertSame('&nbsp;', $assignedVariables['tags_separator']);
+        static::assertSame('whitespace', $assignedVariables['tags_separator_desc']);
+    }
+
+    /**
      * Test posting a tag update - rename tag - valid info provided.
      */
     public function testSaveRenameTagValid(): void
@@ -269,4 +293,116 @@ class ManageTagControllerTest extends TestCase
         static::assertArrayNotHasKey(SessionManager::KEY_SUCCESS_MESSAGES, $session);
         static::assertSame(['Invalid tags provided.'], $session[SessionManager::KEY_WARNING_MESSAGES]);
     }
+
+    /**
+     * Test changeSeparator to '#': redirection + success message.
+     */
+    public function testChangeSeparatorValid(): void
+    {
+        $toSeparator = '#';
+
+        $session = [];
+        $this->assignSessionVars($session);
+
+        $request = $this->createMock(Request::class);
+        $request
+            ->expects(static::atLeastOnce())
+            ->method('getParam')
+            ->willReturnCallback(function (string $key) use ($toSeparator): ?string {
+                return $key === 'separator' ? $toSeparator : $key;
+            })
+        ;
+        $response = new Response();
+
+        $this->container->conf
+            ->expects(static::once())
+            ->method('set')
+            ->with('general.tags_separator', $toSeparator, true, true)
+        ;
+
+        $result = $this->controller->changeSeparator($request, $response);
+
+        static::assertSame(302, $result->getStatusCode());
+        static::assertSame(['/subfolder/admin/tags'], $result->getHeader('location'));
+
+        static::assertArrayNotHasKey(SessionManager::KEY_ERROR_MESSAGES, $session);
+        static::assertArrayNotHasKey(SessionManager::KEY_WARNING_MESSAGES, $session);
+        static::assertArrayHasKey(SessionManager::KEY_SUCCESS_MESSAGES, $session);
+        static::assertSame(
+            ['Your tags separator setting has been updated!'],
+            $session[SessionManager::KEY_SUCCESS_MESSAGES]
+        );
+    }
+
+    /**
+     * Test changeSeparator to '#@' (too long): redirection + error message.
+     */
+    public function testChangeSeparatorInvalidTooLong(): void
+    {
+        $toSeparator = '#@';
+
+        $session = [];
+        $this->assignSessionVars($session);
+
+        $request = $this->createMock(Request::class);
+        $request
+            ->expects(static::atLeastOnce())
+            ->method('getParam')
+            ->willReturnCallback(function (string $key) use ($toSeparator): ?string {
+                return $key === 'separator' ? $toSeparator : $key;
+            })
+        ;
+        $response = new Response();
+
+        $this->container->conf->expects(static::never())->method('set');
+
+        $result = $this->controller->changeSeparator($request, $response);
+
+        static::assertSame(302, $result->getStatusCode());
+        static::assertSame(['/subfolder/admin/tags'], $result->getHeader('location'));
+
+        static::assertArrayNotHasKey(SessionManager::KEY_SUCCESS_MESSAGES, $session);
+        static::assertArrayNotHasKey(SessionManager::KEY_WARNING_MESSAGES, $session);
+        static::assertArrayHasKey(SessionManager::KEY_ERROR_MESSAGES, $session);
+        static::assertSame(
+            ['Tags separator must be a single character.'],
+            $session[SessionManager::KEY_ERROR_MESSAGES]
+        );
+    }
+
+    /**
+     * Test changeSeparator to '#@' (too long): redirection + error message.
+     */
+    public function testChangeSeparatorInvalidReservedCharacter(): void
+    {
+        $toSeparator = '*';
+
+        $session = [];
+        $this->assignSessionVars($session);
+
+        $request = $this->createMock(Request::class);
+        $request
+            ->expects(static::atLeastOnce())
+            ->method('getParam')
+            ->willReturnCallback(function (string $key) use ($toSeparator): ?string {
+                return $key === 'separator' ? $toSeparator : $key;
+            })
+        ;
+        $response = new Response();
+
+        $this->container->conf->expects(static::never())->method('set');
+
+        $result = $this->controller->changeSeparator($request, $response);
+
+        static::assertSame(302, $result->getStatusCode());
+        static::assertSame(['/subfolder/admin/tags'], $result->getHeader('location'));
+
+        static::assertArrayNotHasKey(SessionManager::KEY_SUCCESS_MESSAGES, $session);
+        static::assertArrayNotHasKey(SessionManager::KEY_WARNING_MESSAGES, $session);
+        static::assertArrayHasKey(SessionManager::KEY_ERROR_MESSAGES, $session);
+        static::assertStringStartsWith(
+            'These characters are reserved and can\'t be used as tags separator',
+            $session[SessionManager::KEY_ERROR_MESSAGES][0]
+        );
+    }
 }
diff --git a/tests/front/controller/admin/ServerControllerTest.php b/tests/front/controller/admin/ServerControllerTest.php
new file mode 100644
index 00000000..355cce7d
--- /dev/null
+++ b/tests/front/controller/admin/ServerControllerTest.php
@@ -0,0 +1,184 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shaarli\Front\Controller\Admin;
+
+use Shaarli\Config\ConfigManager;
+use Shaarli\Security\SessionManager;
+use Shaarli\TestCase;
+use Slim\Http\Request;
+use Slim\Http\Response;
+
+/**
+ * Test Server administration controller.
+ */
+class ServerControllerTest extends TestCase
+{
+    use FrontAdminControllerMockHelper;
+
+    /** @var ServerController */
+    protected $controller;
+
+    public function setUp(): void
+    {
+        $this->createContainer();
+
+        $this->controller = new ServerController($this->container);
+
+        // initialize dummy cache
+        @mkdir('sandbox/');
+        foreach (['pagecache', 'tmp', 'cache'] as $folder) {
+            @mkdir('sandbox/' . $folder);
+            @touch('sandbox/' . $folder . '/.htaccess');
+            @touch('sandbox/' . $folder . '/1');
+            @touch('sandbox/' . $folder . '/2');
+        }
+    }
+
+    public function tearDown(): void
+    {
+        foreach (['pagecache', 'tmp', 'cache'] as $folder) {
+            @unlink('sandbox/' . $folder . '/.htaccess');
+            @unlink('sandbox/' . $folder . '/1');
+            @unlink('sandbox/' . $folder . '/2');
+            @rmdir('sandbox/' . $folder);
+        }
+    }
+
+    /**
+     * Test default display of server administration page.
+     */
+    public function testIndex(): void
+    {
+        $request = $this->createMock(Request::class);
+        $response = new Response();
+
+       // Save RainTPL assigned variables
+        $assignedVariables = [];
+        $this->assignTemplateVars($assignedVariables);
+
+        $result = $this->controller->index($request, $response);
+
+        static::assertSame(200, $result->getStatusCode());
+        static::assertSame('server', (string) $result->getBody());
+
+        static::assertSame(PHP_VERSION, $assignedVariables['php_version']);
+        static::assertArrayHasKey('php_has_reached_eol', $assignedVariables);
+        static::assertArrayHasKey('php_eol', $assignedVariables);
+        static::assertArrayHasKey('php_extensions', $assignedVariables);
+        static::assertArrayHasKey('permissions', $assignedVariables);
+        static::assertEmpty($assignedVariables['permissions']);
+
+        static::assertRegExp(
+            '#https://github\.com/shaarli/Shaarli/releases/tag/v\d+\.\d+\.\d+#',
+            $assignedVariables['release_url']
+        );
+        static::assertRegExp('#v\d+\.\d+\.\d+#', $assignedVariables['latest_version']);
+        static::assertRegExp('#(v\d+\.\d+\.\d+|dev)#', $assignedVariables['current_version']);
+        static::assertArrayHasKey('index_url', $assignedVariables);
+        static::assertArrayHasKey('client_ip', $assignedVariables);
+        static::assertArrayHasKey('trusted_proxies', $assignedVariables);
+
+        static::assertSame('Server administration - Shaarli', $assignedVariables['pagetitle']);
+    }
+
+    /**
+     * Test clearing the main cache
+     */
+    public function testClearMainCache(): void
+    {
+        $this->container->conf = $this->createMock(ConfigManager::class);
+        $this->container->conf->method('get')->willReturnCallback(function (string $key, $default) {
+            if ($key === 'resource.page_cache') {
+                return 'sandbox/pagecache';
+            } elseif ($key === 'resource.raintpl_tmp') {
+                return 'sandbox/tmp';
+            } elseif ($key === 'resource.thumbnails_cache') {
+                return 'sandbox/cache';
+            } else {
+                return $default;
+            }
+        });
+
+        $this->container->sessionManager
+            ->expects(static::once())
+            ->method('setSessionParameter')
+            ->with(SessionManager::KEY_SUCCESS_MESSAGES, ['Shaarli\'s cache folder has been cleared!'])
+        ;
+
+        $request = $this->createMock(Request::class);
+        $request->method('getQueryParam')->with('type')->willReturn('main');
+        $response = new Response();
+
+        $result = $this->controller->clearCache($request, $response);
+
+        static::assertSame(302, $result->getStatusCode());
+        static::assertSame('/subfolder/admin/server', (string) $result->getHeaderLine('Location'));
+
+        static::assertFileNotExists('sandbox/pagecache/1');
+        static::assertFileNotExists('sandbox/pagecache/2');
+        static::assertFileNotExists('sandbox/tmp/1');
+        static::assertFileNotExists('sandbox/tmp/2');
+
+        static::assertFileExists('sandbox/pagecache/.htaccess');
+        static::assertFileExists('sandbox/tmp/.htaccess');
+        static::assertFileExists('sandbox/cache');
+        static::assertFileExists('sandbox/cache/.htaccess');
+        static::assertFileExists('sandbox/cache/1');
+        static::assertFileExists('sandbox/cache/2');
+    }
+
+    /**
+     * Test clearing thumbnails cache
+     */
+    public function testClearThumbnailsCache(): void
+    {
+        $this->container->conf = $this->createMock(ConfigManager::class);
+        $this->container->conf->method('get')->willReturnCallback(function (string $key, $default) {
+            if ($key === 'resource.page_cache') {
+                return 'sandbox/pagecache';
+            } elseif ($key === 'resource.raintpl_tmp') {
+                return 'sandbox/tmp';
+            } elseif ($key === 'resource.thumbnails_cache') {
+                return 'sandbox/cache';
+            } else {
+                return $default;
+            }
+        });
+
+        $this->container->sessionManager
+            ->expects(static::once())
+            ->method('setSessionParameter')
+            ->willReturnCallback(function (string $key, array $value): SessionManager {
+                static::assertSame(SessionManager::KEY_WARNING_MESSAGES, $key);
+                static::assertCount(1, $value);
+                static::assertStringStartsWith('Thumbnails cache has been cleared.', $value[0]);
+
+                return $this->container->sessionManager;
+            });
+        ;
+
+        $request = $this->createMock(Request::class);
+        $request->method('getQueryParam')->with('type')->willReturn('thumbnails');
+        $response = new Response();
+
+        $result = $this->controller->clearCache($request, $response);
+
+        static::assertSame(302, $result->getStatusCode());
+        static::assertSame('/subfolder/admin/server', (string) $result->getHeaderLine('Location'));
+
+        static::assertFileNotExists('sandbox/cache/1');
+        static::assertFileNotExists('sandbox/cache/2');
+
+        static::assertFileExists('sandbox/cache/.htaccess');
+        static::assertFileExists('sandbox/pagecache');
+        static::assertFileExists('sandbox/pagecache/.htaccess');
+        static::assertFileExists('sandbox/pagecache/1');
+        static::assertFileExists('sandbox/pagecache/2');
+        static::assertFileExists('sandbox/tmp');
+        static::assertFileExists('sandbox/tmp/.htaccess');
+        static::assertFileExists('sandbox/tmp/1');
+        static::assertFileExists('sandbox/tmp/2');
+    }
+}
diff --git a/tests/front/controller/admin/ShaareAddControllerTest.php b/tests/front/controller/admin/ShaareAddControllerTest.php
new file mode 100644
index 00000000..a27ebe64
--- /dev/null
+++ b/tests/front/controller/admin/ShaareAddControllerTest.php
@@ -0,0 +1,97 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shaarli\Front\Controller\Admin;
+
+use Shaarli\Config\ConfigManager;
+use Shaarli\Formatter\BookmarkMarkdownFormatter;
+use Shaarli\Http\HttpAccess;
+use Shaarli\TestCase;
+use Slim\Http\Request;
+use Slim\Http\Response;
+
+class ShaareAddControllerTest extends TestCase
+{
+    use FrontAdminControllerMockHelper;
+
+    /** @var ShaareAddController */
+    protected $controller;
+
+    public function setUp(): void
+    {
+        $this->createContainer();
+
+        $this->container->httpAccess = $this->createMock(HttpAccess::class);
+        $this->controller = new ShaareAddController($this->container);
+    }
+
+    /**
+     * Test displaying add link page
+     */
+    public function testAddShaare(): void
+    {
+        $assignedVariables = [];
+        $this->assignTemplateVars($assignedVariables);
+
+        $request = $this->createMock(Request::class);
+        $response = new Response();
+
+        $expectedTags = [
+            'tag1' => 32,
+            'tag2' => 24,
+            'tag3' => 1,
+        ];
+        $this->container->bookmarkService
+            ->expects(static::once())
+            ->method('bookmarksCountPerTag')
+            ->willReturn($expectedTags)
+        ;
+        $expectedTags = array_merge($expectedTags, [BookmarkMarkdownFormatter::NO_MD_TAG => 1]);
+
+        $this->container->conf = $this->createMock(ConfigManager::class);
+        $this->container->conf->method('get')->willReturnCallback(function (string $key, $default) {
+            return $key === 'formatter' ? 'markdown' : $default;
+        });
+
+        $result = $this->controller->addShaare($request, $response);
+
+        static::assertSame(200, $result->getStatusCode());
+        static::assertSame('addlink', (string) $result->getBody());
+
+        static::assertSame('Shaare a new link - Shaarli', $assignedVariables['pagetitle']);
+        static::assertFalse($assignedVariables['default_private_links']);
+        static::assertTrue($assignedVariables['async_metadata']);
+        static::assertSame($expectedTags, $assignedVariables['tags']);
+    }
+
+    /**
+     * Test displaying add link page
+     */
+    public function testAddShaareWithoutMd(): void
+    {
+        $assignedVariables = [];
+        $this->assignTemplateVars($assignedVariables);
+
+        $request = $this->createMock(Request::class);
+        $response = new Response();
+
+        $expectedTags = [
+            'tag1' => 32,
+            'tag2' => 24,
+            'tag3' => 1,
+        ];
+        $this->container->bookmarkService
+            ->expects(static::once())
+            ->method('bookmarksCountPerTag')
+            ->willReturn($expectedTags)
+        ;
+
+        $result = $this->controller->addShaare($request, $response);
+
+        static::assertSame(200, $result->getStatusCode());
+        static::assertSame('addlink', (string) $result->getBody());
+
+        static::assertSame($expectedTags, $assignedVariables['tags']);
+    }
+}
diff --git a/tests/front/controller/admin/ManageShaareControllerTest/ChangeVisibilityBookmarkTest.php b/tests/front/controller/admin/ShaareManageControllerTest/ChangeVisibilityBookmarkTest.php
index 096d0774..28b1c023 100644
--- a/tests/front/controller/admin/ManageShaareControllerTest/ChangeVisibilityBookmarkTest.php
+++ b/tests/front/controller/admin/ShaareManageControllerTest/ChangeVisibilityBookmarkTest.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Shaarli\Front\Controller\Admin\ManageShaareControllerTest;
+namespace Shaarli\Front\Controller\Admin\ShaareManageControllerTest;
 
 use Shaarli\Bookmark\Bookmark;
 use Shaarli\Bookmark\Exception\BookmarkNotFoundException;
@@ -10,7 +10,7 @@ use Shaarli\Formatter\BookmarkFormatter;
 use Shaarli\Formatter\BookmarkRawFormatter;
 use Shaarli\Formatter\FormatterFactory;
 use Shaarli\Front\Controller\Admin\FrontAdminControllerMockHelper;
-use Shaarli\Front\Controller\Admin\ManageShaareController;
+use Shaarli\Front\Controller\Admin\ShaareManageController;
 use Shaarli\Http\HttpAccess;
 use Shaarli\Security\SessionManager;
 use Shaarli\TestCase;
@@ -21,7 +21,7 @@ class ChangeVisibilityBookmarkTest extends TestCase
 {
     use FrontAdminControllerMockHelper;
 
-    /** @var ManageShaareController */
+    /** @var ShaareManageController */
     protected $controller;
 
     public function setUp(): void
@@ -29,7 +29,7 @@ class ChangeVisibilityBookmarkTest extends TestCase
         $this->createContainer();
 
         $this->container->httpAccess = $this->createMock(HttpAccess::class);
-        $this->controller = new ManageShaareController($this->container);
+        $this->controller = new ShaareManageController($this->container);
     }
 
     /**
diff --git a/tests/front/controller/admin/ManageShaareControllerTest/DeleteBookmarkTest.php b/tests/front/controller/admin/ShaareManageControllerTest/DeleteBookmarkTest.php
index ba774e21..a276d988 100644
--- a/tests/front/controller/admin/ManageShaareControllerTest/DeleteBookmarkTest.php
+++ b/tests/front/controller/admin/ShaareManageControllerTest/DeleteBookmarkTest.php
@@ -2,14 +2,14 @@
 
 declare(strict_types=1);
 
-namespace Shaarli\Front\Controller\Admin\ManageShaareControllerTest;
+namespace Shaarli\Front\Controller\Admin\ShaareManageControllerTest;
 
 use Shaarli\Bookmark\Bookmark;
 use Shaarli\Bookmark\Exception\BookmarkNotFoundException;
 use Shaarli\Formatter\BookmarkFormatter;
 use Shaarli\Formatter\FormatterFactory;
 use Shaarli\Front\Controller\Admin\FrontAdminControllerMockHelper;
-use Shaarli\Front\Controller\Admin\ManageShaareController;
+use Shaarli\Front\Controller\Admin\ShaareManageController;
 use Shaarli\Http\HttpAccess;
 use Shaarli\Security\SessionManager;
 use Shaarli\TestCase;
@@ -20,7 +20,7 @@ class DeleteBookmarkTest extends TestCase
 {
     use FrontAdminControllerMockHelper;
 
-    /** @var ManageShaareController */
+    /** @var ShaareManageController */
     protected $controller;
 
     public function setUp(): void
@@ -28,7 +28,7 @@ class DeleteBookmarkTest extends TestCase
         $this->createContainer();
 
         $this->container->httpAccess = $this->createMock(HttpAccess::class);
-        $this->controller = new ManageShaareController($this->container);
+        $this->controller = new ShaareManageController($this->container);
     }
 
     /**
@@ -38,6 +38,8 @@ class DeleteBookmarkTest extends TestCase
     {
         $parameters = ['id' => '123'];
 
+        $this->container->environment['HTTP_REFERER'] = 'http://shaarli/subfolder/shaare/abcdef';
+
         $request = $this->createMock(Request::class);
         $request
             ->method('getParam')
@@ -90,6 +92,8 @@ class DeleteBookmarkTest extends TestCase
     {
         $parameters = ['id' => '123 456 789'];
 
+        $this->container->environment['HTTP_REFERER'] = 'http://shaarli/subfolder/?searchtags=abcdef';
+
         $request = $this->createMock(Request::class);
         $request
             ->method('getParam')
@@ -152,7 +156,7 @@ class DeleteBookmarkTest extends TestCase
         $result = $this->controller->deleteBookmark($request, $response);
 
         static::assertSame(302, $result->getStatusCode());
-        static::assertSame(['/subfolder/'], $result->getHeader('location'));
+        static::assertSame(['/subfolder/?searchtags=abcdef'], $result->getHeader('location'));
     }
 
     /**
@@ -356,6 +360,10 @@ class DeleteBookmarkTest extends TestCase
         ;
         $response = new Response();
 
+        $this->container->bookmarkService->method('get')->with('123')->willReturn(
+            (new Bookmark())->setId(123)->setUrl('http://domain.tld')->setTitle('Title 123')
+        );
+
         $this->container->formatterFactory = $this->createMock(FormatterFactory::class);
         $this->container->formatterFactory
             ->expects(static::once())
diff --git a/tests/front/controller/admin/ManageShaareControllerTest/PinBookmarkTest.php b/tests/front/controller/admin/ShaareManageControllerTest/PinBookmarkTest.php
index 50ce7df1..b89206ce 100644
--- a/tests/front/controller/admin/ManageShaareControllerTest/PinBookmarkTest.php
+++ b/tests/front/controller/admin/ShaareManageControllerTest/PinBookmarkTest.php
@@ -2,12 +2,12 @@
 
 declare(strict_types=1);
 
-namespace Shaarli\Front\Controller\Admin\ManageShaareControllerTest;
+namespace Shaarli\Front\Controller\Admin\ShaareManageControllerTest;
 
 use Shaarli\Bookmark\Bookmark;
 use Shaarli\Bookmark\Exception\BookmarkNotFoundException;
 use Shaarli\Front\Controller\Admin\FrontAdminControllerMockHelper;
-use Shaarli\Front\Controller\Admin\ManageShaareController;
+use Shaarli\Front\Controller\Admin\ShaareManageController;
 use Shaarli\Http\HttpAccess;
 use Shaarli\Security\SessionManager;
 use Shaarli\TestCase;
@@ -18,7 +18,7 @@ class PinBookmarkTest extends TestCase
 {
     use FrontAdminControllerMockHelper;
 
-    /** @var ManageShaareController */
+    /** @var ShaareManageController */
     protected $controller;
 
     public function setUp(): void
@@ -26,7 +26,7 @@ class PinBookmarkTest extends TestCase
         $this->createContainer();
 
         $this->container->httpAccess = $this->createMock(HttpAccess::class);
-        $this->controller = new ManageShaareController($this->container);
+        $this->controller = new ShaareManageController($this->container);
     }
 
     /**
diff --git a/tests/front/controller/admin/ShaareManageControllerTest/SharePrivateTest.php b/tests/front/controller/admin/ShaareManageControllerTest/SharePrivateTest.php
new file mode 100644
index 00000000..ae61dfb7
--- /dev/null
+++ b/tests/front/controller/admin/ShaareManageControllerTest/SharePrivateTest.php
@@ -0,0 +1,139 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shaarli\Front\Controller\Admin\ShaareManageControllerTest;
+
+use Shaarli\Bookmark\Bookmark;
+use Shaarli\Front\Controller\Admin\FrontAdminControllerMockHelper;
+use Shaarli\Front\Controller\Admin\ShaareManageController;
+use Shaarli\Http\HttpAccess;
+use Shaarli\TestCase;
+use Slim\Http\Request;
+use Slim\Http\Response;
+
+/**
+ * Test GET /admin/shaare/private/{hash}
+ */
+class SharePrivateTest extends TestCase
+{
+    use FrontAdminControllerMockHelper;
+
+    /** @var ShaareManageController */
+    protected $controller;
+
+    public function setUp(): void
+    {
+        $this->createContainer();
+
+        $this->container->httpAccess = $this->createMock(HttpAccess::class);
+        $this->controller = new ShaareManageController($this->container);
+    }
+
+    /**
+     * Test shaare private with a private bookmark which does not have a key yet.
+     */
+    public function testSharePrivateWithNewPrivateBookmark(): void
+    {
+        $hash = 'abcdcef';
+        $request = $this->createMock(Request::class);
+        $response = new Response();
+
+        $bookmark = (new Bookmark())
+            ->setId(123)
+            ->setUrl('http://domain.tld')
+            ->setTitle('Title 123')
+            ->setPrivate(true)
+        ;
+
+        $this->container->bookmarkService
+            ->expects(static::once())
+            ->method('findByHash')
+            ->with($hash)
+            ->willReturn($bookmark)
+        ;
+        $this->container->bookmarkService
+            ->expects(static::once())
+            ->method('set')
+            ->with($bookmark, true)
+            ->willReturnCallback(function (Bookmark $bookmark): Bookmark {
+                static::assertSame(32, strlen($bookmark->getAdditionalContentEntry('private_key')));
+
+                return $bookmark;
+            })
+        ;
+
+        $result = $this->controller->sharePrivate($request, $response, ['hash' => $hash]);
+
+        static::assertSame(302, $result->getStatusCode());
+        static::assertRegExp('#/subfolder/shaare/' . $hash . '\?key=\w{32}#', $result->getHeaderLine('Location'));
+    }
+
+    /**
+     * Test shaare private with a private bookmark which does already have a key.
+     */
+    public function testSharePrivateWithExistingPrivateBookmark(): void
+    {
+        $hash = 'abcdcef';
+        $existingKey = 'this is a private key';
+        $request = $this->createMock(Request::class);
+        $response = new Response();
+
+        $bookmark = (new Bookmark())
+            ->setId(123)
+            ->setUrl('http://domain.tld')
+            ->setTitle('Title 123')
+            ->setPrivate(true)
+            ->addAdditionalContentEntry('private_key', $existingKey)
+        ;
+
+        $this->container->bookmarkService
+            ->expects(static::once())
+            ->method('findByHash')
+            ->with($hash)
+            ->willReturn($bookmark)
+        ;
+        $this->container->bookmarkService
+            ->expects(static::never())
+            ->method('set')
+        ;
+
+        $result = $this->controller->sharePrivate($request, $response, ['hash' => $hash]);
+
+        static::assertSame(302, $result->getStatusCode());
+        static::assertSame('/subfolder/shaare/' . $hash . '?key=' . $existingKey, $result->getHeaderLine('Location'));
+    }
+
+    /**
+     * Test shaare private with a public bookmark.
+     */
+    public function testSharePrivateWithPublicBookmark(): void
+    {
+        $hash = 'abcdcef';
+        $request = $this->createMock(Request::class);
+        $response = new Response();
+
+        $bookmark = (new Bookmark())
+            ->setId(123)
+            ->setUrl('http://domain.tld')
+            ->setTitle('Title 123')
+            ->setPrivate(false)
+        ;
+
+        $this->container->bookmarkService
+            ->expects(static::once())
+            ->method('findByHash')
+            ->with($hash)
+            ->willReturn($bookmark)
+        ;
+        $this->container->bookmarkService
+            ->expects(static::never())
+            ->method('set')
+        ;
+
+        $result = $this->controller->sharePrivate($request, $response, ['hash' => $hash]);
+
+        static::assertSame(302, $result->getStatusCode());
+        static::assertSame('/subfolder/shaare/' . $hash, $result->getHeaderLine('Location'));
+    }
+}
diff --git a/tests/front/controller/admin/ShaarePublishControllerTest/DisplayCreateBatchFormTest.php b/tests/front/controller/admin/ShaarePublishControllerTest/DisplayCreateBatchFormTest.php
new file mode 100644
index 00000000..ce8e112b
--- /dev/null
+++ b/tests/front/controller/admin/ShaarePublishControllerTest/DisplayCreateBatchFormTest.php
@@ -0,0 +1,63 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shaarli\Front\Controller\Admin\ShaarePublishControllerTest;
+
+use Shaarli\Front\Controller\Admin\FrontAdminControllerMockHelper;
+use Shaarli\Front\Controller\Admin\ShaarePublishController;
+use Shaarli\Http\HttpAccess;
+use Shaarli\Http\MetadataRetriever;
+use Shaarli\TestCase;
+use Slim\Http\Request;
+use Slim\Http\Response;
+
+class DisplayCreateBatchFormTest extends TestCase
+{
+    use FrontAdminControllerMockHelper;
+
+    /** @var ShaarePublishController */
+    protected $controller;
+
+    public function setUp(): void
+    {
+        $this->createContainer();
+
+        $this->container->httpAccess = $this->createMock(HttpAccess::class);
+        $this->container->metadataRetriever = $this->createMock(MetadataRetriever::class);
+        $this->controller = new ShaarePublishController($this->container);
+    }
+
+    /**
+     * TODO
+     */
+    public function testDisplayCreateFormBatch(): void
+    {
+        $urls = [
+            'https://domain1.tld/url1',
+            'https://domain2.tld/url2',
+            ' ',
+            'https://domain3.tld/url3',
+        ];
+
+        $request = $this->createMock(Request::class);
+        $request->method('getParam')->willReturnCallback(function (string $key) use ($urls): ?string {
+            return $key === 'urls' ? implode(PHP_EOL, $urls) : null;
+        });
+        $response = new Response();
+
+        $assignedVariables = [];
+        $this->assignTemplateVars($assignedVariables);
+
+        $result = $this->controller->displayCreateBatchForms($request, $response);
+
+        static::assertSame(200, $result->getStatusCode());
+        static::assertSame('editlink.batch', (string) $result->getBody());
+
+        static::assertTrue($assignedVariables['batch_mode']);
+        static::assertCount(3, $assignedVariables['links']);
+        static::assertSame($urls[0], $assignedVariables['links'][0]['link']['url']);
+        static::assertSame($urls[1], $assignedVariables['links'][1]['link']['url']);
+        static::assertSame($urls[3], $assignedVariables['links'][2]['link']['url']);
+    }
+}
diff --git a/tests/front/controller/admin/ManageShaareControllerTest/DisplayCreateFormTest.php b/tests/front/controller/admin/ShaarePublishControllerTest/DisplayCreateFormTest.php
index 2eb95251..964773da 100644
--- a/tests/front/controller/admin/ManageShaareControllerTest/DisplayCreateFormTest.php
+++ b/tests/front/controller/admin/ShaarePublishControllerTest/DisplayCreateFormTest.php
@@ -2,13 +2,14 @@
 
 declare(strict_types=1);
 
-namespace Shaarli\Front\Controller\Admin\ManageShaareControllerTest;
+namespace Shaarli\Front\Controller\Admin\ShaarePublishControllerTest;
 
 use Shaarli\Bookmark\Bookmark;
 use Shaarli\Config\ConfigManager;
 use Shaarli\Front\Controller\Admin\FrontAdminControllerMockHelper;
-use Shaarli\Front\Controller\Admin\ManageShaareController;
+use Shaarli\Front\Controller\Admin\ShaarePublishController;
 use Shaarli\Http\HttpAccess;
+use Shaarli\Http\MetadataRetriever;
 use Shaarli\TestCase;
 use Slim\Http\Request;
 use Slim\Http\Response;
@@ -17,7 +18,7 @@ class DisplayCreateFormTest extends TestCase
 {
     use FrontAdminControllerMockHelper;
 
-    /** @var ManageShaareController */
+    /** @var ShaarePublishController */
     protected $controller;
 
     public function setUp(): void
@@ -25,14 +26,15 @@ class DisplayCreateFormTest extends TestCase
         $this->createContainer();
 
         $this->container->httpAccess = $this->createMock(HttpAccess::class);
-        $this->controller = new ManageShaareController($this->container);
+        $this->container->metadataRetriever = $this->createMock(MetadataRetriever::class);
+        $this->controller = new ShaarePublishController($this->container);
     }
 
     /**
      * Test displaying bookmark create form
      * Ensure that every step of the standard workflow works properly.
      */
-    public function testDisplayCreateFormWithUrl(): void
+    public function testDisplayCreateFormWithUrlAndWithMetadataRetrieval(): void
     {
         $this->container->environment = [
             'HTTP_REFERER' => $referer = 'http://shaarli/subfolder/controller/?searchtag=abc'
@@ -53,40 +55,20 @@ class DisplayCreateFormTest extends TestCase
         });
         $response = new Response();
 
-        $this->container->httpAccess
-            ->expects(static::once())
-            ->method('getCurlDownloadCallback')
-            ->willReturnCallback(
-                function (&$charset, &$title, &$description, &$tags) use (
-                    $remoteTitle,
-                    $remoteDesc,
-                    $remoteTags
-                ): callable {
-                    return function () use (
-                        &$charset,
-                        &$title,
-                        &$description,
-                        &$tags,
-                        $remoteTitle,
-                        $remoteDesc,
-                        $remoteTags
-                    ): void {
-                        $charset = 'ISO-8859-1';
-                        $title = $remoteTitle;
-                        $description = $remoteDesc;
-                        $tags = $remoteTags;
-                    };
-                }
-            )
-        ;
-        $this->container->httpAccess
-            ->expects(static::once())
-            ->method('getHttpResponse')
-            ->with($expectedUrl, 30, 4194304)
-            ->willReturnCallback(function($url, $timeout, $maxBytes, $callback): void {
-                $callback();
-            })
-        ;
+        $this->container->conf = $this->createMock(ConfigManager::class);
+        $this->container->conf->method('get')->willReturnCallback(function (string $param, $default) {
+            if ($param === 'general.enable_async_metadata') {
+                return false;
+            }
+
+            return $default;
+        });
+
+        $this->container->metadataRetriever->expects(static::once())->method('retrieve')->willReturn([
+            'title' => $remoteTitle,
+            'description' => $remoteDesc,
+            'tags' => $remoteTags,
+        ]);
 
         $this->container->bookmarkService
             ->expects(static::once())
@@ -119,7 +101,73 @@ class DisplayCreateFormTest extends TestCase
         static::assertSame($expectedUrl, $assignedVariables['link']['url']);
         static::assertSame($remoteTitle, $assignedVariables['link']['title']);
         static::assertSame($remoteDesc, $assignedVariables['link']['description']);
-        static::assertSame($remoteTags, $assignedVariables['link']['tags']);
+        static::assertSame($remoteTags . ' ', $assignedVariables['link']['tags']);
+        static::assertFalse($assignedVariables['link']['private']);
+
+        static::assertTrue($assignedVariables['link_is_new']);
+        static::assertSame($referer, $assignedVariables['http_referer']);
+        static::assertSame($tags, $assignedVariables['tags']);
+        static::assertArrayHasKey('source', $assignedVariables);
+        static::assertArrayHasKey('default_private_links', $assignedVariables);
+        static::assertArrayHasKey('async_metadata', $assignedVariables);
+        static::assertArrayHasKey('retrieve_description', $assignedVariables);
+    }
+
+    /**
+     * Test displaying bookmark create form without any external metadata retrieval attempt
+     */
+    public function testDisplayCreateFormWithUrlAndWithoutMetadata(): void
+    {
+        $this->container->environment = [
+            'HTTP_REFERER' => $referer = 'http://shaarli/subfolder/controller/?searchtag=abc'
+        ];
+
+        $assignedVariables = [];
+        $this->assignTemplateVars($assignedVariables);
+
+        $url = 'http://url.tld/other?part=3&utm_ad=pay#hash';
+        $expectedUrl = str_replace('&utm_ad=pay', '', $url);
+
+        $request = $this->createMock(Request::class);
+        $request->method('getParam')->willReturnCallback(function (string $key) use ($url): ?string {
+            return $key === 'post' ? $url : null;
+        });
+        $response = new Response();
+
+        $this->container->metadataRetriever->expects(static::never())->method('retrieve');
+
+        $this->container->bookmarkService
+            ->expects(static::once())
+            ->method('bookmarksCountPerTag')
+            ->willReturn($tags = ['tag1' => 2, 'tag2' => 1])
+        ;
+
+        // Make sure that PluginManager hook is triggered
+        $this->container->pluginManager
+            ->expects(static::atLeastOnce())
+            ->method('executeHooks')
+            ->withConsecutive(['render_editlink'], ['render_includes'])
+            ->willReturnCallback(function (string $hook, array $data): array {
+                if ('render_editlink' === $hook) {
+                    static::assertSame('', $data['link']['title']);
+                    static::assertSame('', $data['link']['description']);
+                }
+
+                return $data;
+            })
+        ;
+
+        $result = $this->controller->displayCreateForm($request, $response);
+
+        static::assertSame(200, $result->getStatusCode());
+        static::assertSame('editlink', (string) $result->getBody());
+
+        static::assertSame('Shaare - Shaarli', $assignedVariables['pagetitle']);
+
+        static::assertSame($expectedUrl, $assignedVariables['link']['url']);
+        static::assertSame('', $assignedVariables['link']['title']);
+        static::assertSame('', $assignedVariables['link']['description']);
+        static::assertSame('', $assignedVariables['link']['tags']);
         static::assertFalse($assignedVariables['link']['private']);
 
         static::assertTrue($assignedVariables['link_is_new']);
@@ -127,6 +175,8 @@ class DisplayCreateFormTest extends TestCase
         static::assertSame($tags, $assignedVariables['tags']);
         static::assertArrayHasKey('source', $assignedVariables);
         static::assertArrayHasKey('default_private_links', $assignedVariables);
+        static::assertArrayHasKey('async_metadata', $assignedVariables);
+        static::assertArrayHasKey('retrieve_description', $assignedVariables);
     }
 
     /**
@@ -142,7 +192,7 @@ class DisplayCreateFormTest extends TestCase
             'post' => 'http://url.tld/other?part=3&utm_ad=pay#hash',
             'title' => 'Provided Title',
             'description' => 'Provided description.',
-            'tags' => 'abc def',
+            'tags' => 'abc@def',
             'private' => '1',
             'source' => 'apps',
         ];
@@ -166,7 +216,7 @@ class DisplayCreateFormTest extends TestCase
         static::assertSame($expectedUrl, $assignedVariables['link']['url']);
         static::assertSame($parameters['title'], $assignedVariables['link']['title']);
         static::assertSame($parameters['description'], $assignedVariables['link']['description']);
-        static::assertSame($parameters['tags'], $assignedVariables['link']['tags']);
+        static::assertSame($parameters['tags'] . '@', $assignedVariables['link']['tags']);
         static::assertTrue($assignedVariables['link']['private']);
         static::assertTrue($assignedVariables['link_is_new']);
         static::assertSame($parameters['source'], $assignedVariables['source']);
@@ -310,7 +360,7 @@ class DisplayCreateFormTest extends TestCase
         static::assertSame($expectedUrl, $assignedVariables['link']['url']);
         static::assertSame($title, $assignedVariables['link']['title']);
         static::assertSame($description, $assignedVariables['link']['description']);
-        static::assertSame(implode(' ', $tags), $assignedVariables['link']['tags']);
+        static::assertSame(implode('@', $tags) . '@', $assignedVariables['link']['tags']);
         static::assertTrue($assignedVariables['link']['private']);
         static::assertSame($createdAt, $assignedVariables['link']['created']);
     }
diff --git a/tests/front/controller/admin/ManageShaareControllerTest/DisplayEditFormTest.php b/tests/front/controller/admin/ShaarePublishControllerTest/DisplayEditFormTest.php
index 2dc3f41c..738cea12 100644
--- a/tests/front/controller/admin/ManageShaareControllerTest/DisplayEditFormTest.php
+++ b/tests/front/controller/admin/ShaarePublishControllerTest/DisplayEditFormTest.php
@@ -2,12 +2,12 @@
 
 declare(strict_types=1);
 
-namespace Shaarli\Front\Controller\Admin\ManageShaareControllerTest;
+namespace Shaarli\Front\Controller\Admin\ShaarePublishControllerTest;
 
 use Shaarli\Bookmark\Bookmark;
 use Shaarli\Bookmark\Exception\BookmarkNotFoundException;
 use Shaarli\Front\Controller\Admin\FrontAdminControllerMockHelper;
-use Shaarli\Front\Controller\Admin\ManageShaareController;
+use Shaarli\Front\Controller\Admin\ShaarePublishController;
 use Shaarli\Http\HttpAccess;
 use Shaarli\Security\SessionManager;
 use Shaarli\TestCase;
@@ -18,7 +18,7 @@ class DisplayEditFormTest extends TestCase
 {
     use FrontAdminControllerMockHelper;
 
-    /** @var ManageShaareController */
+    /** @var ShaarePublishController */
     protected $controller;
 
     public function setUp(): void
@@ -26,7 +26,7 @@ class DisplayEditFormTest extends TestCase
         $this->createContainer();
 
         $this->container->httpAccess = $this->createMock(HttpAccess::class);
-        $this->controller = new ManageShaareController($this->container);
+        $this->controller = new ShaarePublishController($this->container);
     }
 
     /**
@@ -74,7 +74,7 @@ class DisplayEditFormTest extends TestCase
         static::assertSame($url, $assignedVariables['link']['url']);
         static::assertSame($title, $assignedVariables['link']['title']);
         static::assertSame($description, $assignedVariables['link']['description']);
-        static::assertSame(implode(' ', $tags), $assignedVariables['link']['tags']);
+        static::assertSame(implode('@', $tags) . '@', $assignedVariables['link']['tags']);
         static::assertTrue($assignedVariables['link']['private']);
         static::assertSame($createdAt, $assignedVariables['link']['created']);
     }
diff --git a/tests/front/controller/admin/ManageShaareControllerTest/SaveBookmarkTest.php b/tests/front/controller/admin/ShaarePublishControllerTest/SaveBookmarkTest.php
index f7a68226..b6a861bc 100644
--- a/tests/front/controller/admin/ManageShaareControllerTest/SaveBookmarkTest.php
+++ b/tests/front/controller/admin/ShaarePublishControllerTest/SaveBookmarkTest.php
@@ -2,12 +2,12 @@
 
 declare(strict_types=1);
 
-namespace Shaarli\Front\Controller\Admin\ManageShaareControllerTest;
+namespace Shaarli\Front\Controller\Admin\ShaarePublishControllerTest;
 
 use Shaarli\Bookmark\Bookmark;
 use Shaarli\Config\ConfigManager;
 use Shaarli\Front\Controller\Admin\FrontAdminControllerMockHelper;
-use Shaarli\Front\Controller\Admin\ManageShaareController;
+use Shaarli\Front\Controller\Admin\ShaarePublishController;
 use Shaarli\Front\Exception\WrongTokenException;
 use Shaarli\Http\HttpAccess;
 use Shaarli\Security\SessionManager;
@@ -20,7 +20,7 @@ class SaveBookmarkTest extends TestCase
 {
     use FrontAdminControllerMockHelper;
 
-    /** @var ManageShaareController */
+    /** @var ShaarePublishController */
     protected $controller;
 
     public function setUp(): void
@@ -28,7 +28,7 @@ class SaveBookmarkTest extends TestCase
         $this->createContainer();
 
         $this->container->httpAccess = $this->createMock(HttpAccess::class);
-        $this->controller = new ManageShaareController($this->container);
+        $this->controller = new ShaarePublishController($this->container);
     }
 
     /**
@@ -66,23 +66,27 @@ class SaveBookmarkTest extends TestCase
         $this->container->bookmarkService
             ->expects(static::once())
             ->method('addOrSet')
-            ->willReturnCallback(function (Bookmark $bookmark, bool $save) use ($checkBookmark, $id): void {
+            ->willReturnCallback(function (Bookmark $bookmark, bool $save) use ($checkBookmark, $id): Bookmark {
                 static::assertFalse($save);
 
                 $checkBookmark($bookmark);
 
                 $bookmark->setId($id);
+
+                return $bookmark;
             })
         ;
         $this->container->bookmarkService
             ->expects(static::once())
             ->method('set')
-            ->willReturnCallback(function (Bookmark $bookmark, bool $save) use ($checkBookmark, $id): void {
+            ->willReturnCallback(function (Bookmark $bookmark, bool $save) use ($checkBookmark, $id): Bookmark {
                 static::assertTrue($save);
 
                 $checkBookmark($bookmark);
 
                 static::assertSame($id, $bookmark->getId());
+
+                return $bookmark;
             })
         ;
 
@@ -155,21 +159,25 @@ class SaveBookmarkTest extends TestCase
         $this->container->bookmarkService
             ->expects(static::once())
             ->method('addOrSet')
-            ->willReturnCallback(function (Bookmark $bookmark, bool $save) use ($checkBookmark, $id): void {
+            ->willReturnCallback(function (Bookmark $bookmark, bool $save) use ($checkBookmark, $id): Bookmark {
                 static::assertFalse($save);
 
                 $checkBookmark($bookmark);
+
+                return $bookmark;
             })
         ;
         $this->container->bookmarkService
             ->expects(static::once())
             ->method('set')
-            ->willReturnCallback(function (Bookmark $bookmark, bool $save) use ($checkBookmark, $id): void {
+            ->willReturnCallback(function (Bookmark $bookmark, bool $save) use ($checkBookmark, $id): Bookmark {
                 static::assertTrue($save);
 
                 $checkBookmark($bookmark);
 
                 static::assertSame($id, $bookmark->getId());
+
+                return $bookmark;
             })
         ;
 
@@ -201,7 +209,7 @@ class SaveBookmarkTest extends TestCase
     /**
      * Test save a bookmark - try to retrieve the thumbnail
      */
-    public function testSaveBookmarkWithThumbnail(): void
+    public function testSaveBookmarkWithThumbnailSync(): void
     {
         $parameters = ['lf_url' => 'http://url.tld/other?part=3#hash'];
 
@@ -216,7 +224,13 @@ class SaveBookmarkTest extends TestCase
 
         $this->container->conf = $this->createMock(ConfigManager::class);
         $this->container->conf->method('get')->willReturnCallback(function (string $key, $default) {
-            return $key === 'thumbnails.mode' ? Thumbnailer::MODE_ALL : $default;
+            if ($key === 'thumbnails.mode') {
+                return Thumbnailer::MODE_ALL;
+            } elseif ($key === 'general.enable_async_metadata') {
+                return false;
+            }
+
+            return $default;
         });
 
         $this->container->thumbnailer = $this->createMock(Thumbnailer::class);
@@ -230,8 +244,10 @@ class SaveBookmarkTest extends TestCase
         $this->container->bookmarkService
             ->expects(static::once())
             ->method('addOrSet')
-            ->willReturnCallback(function (Bookmark $bookmark, bool $save) use ($thumb): void {
+            ->willReturnCallback(function (Bookmark $bookmark, bool $save) use ($thumb): Bookmark {
                 static::assertSame($thumb, $bookmark->getThumbnail());
+
+                return $bookmark;
             })
         ;
 
@@ -265,6 +281,51 @@ class SaveBookmarkTest extends TestCase
     }
 
     /**
+     * Test save a bookmark - do not attempt to retrieve thumbnails if async mode is enabled.
+     */
+    public function testSaveBookmarkWithThumbnailAsync(): void
+    {
+        $parameters = ['lf_url' => 'http://url.tld/other?part=3#hash'];
+
+        $request = $this->createMock(Request::class);
+        $request
+            ->method('getParam')
+            ->willReturnCallback(function (string $key) use ($parameters): ?string {
+                return $parameters[$key] ?? null;
+            })
+        ;
+        $response = new Response();
+
+        $this->container->conf = $this->createMock(ConfigManager::class);
+        $this->container->conf->method('get')->willReturnCallback(function (string $key, $default) {
+            if ($key === 'thumbnails.mode') {
+                return Thumbnailer::MODE_ALL;
+            } elseif ($key === 'general.enable_async_metadata') {
+                return true;
+            }
+
+            return $default;
+        });
+
+        $this->container->thumbnailer = $this->createMock(Thumbnailer::class);
+        $this->container->thumbnailer->expects(static::never())->method('get');
+
+        $this->container->bookmarkService
+            ->expects(static::once())
+            ->method('addOrSet')
+            ->willReturnCallback(function (Bookmark $bookmark): Bookmark {
+                static::assertNull($bookmark->getThumbnail());
+
+                return $bookmark;
+            })
+        ;
+
+        $result = $this->controller->save($request, $response);
+
+        static::assertSame(302, $result->getStatusCode());
+    }
+
+    /**
      * Change the password with a wrong existing password
      */
     public function testSaveBookmarkFromBookmarklet(): void
diff --git a/tests/front/controller/admin/ThumbnailsControllerTest.php b/tests/front/controller/admin/ThumbnailsControllerTest.php
index f4a8acff..e5749654 100644
--- a/tests/front/controller/admin/ThumbnailsControllerTest.php
+++ b/tests/front/controller/admin/ThumbnailsControllerTest.php
@@ -89,8 +89,10 @@ class ThumbnailsControllerTest extends TestCase
         $this->container->bookmarkService
             ->expects(static::once())
             ->method('set')
-            ->willReturnCallback(function (Bookmark $bookmark) use ($thumb) {
+            ->willReturnCallback(function (Bookmark $bookmark) use ($thumb): Bookmark {
                 static::assertSame($thumb, $bookmark->getThumbnail());
+
+                return $bookmark;
             })
         ;
 
diff --git a/tests/front/controller/visitor/BookmarkListControllerTest.php b/tests/front/controller/visitor/BookmarkListControllerTest.php
index 0c95df97..dec938f2 100644
--- a/tests/front/controller/visitor/BookmarkListControllerTest.php
+++ b/tests/front/controller/visitor/BookmarkListControllerTest.php
@@ -173,7 +173,7 @@ class BookmarkListControllerTest extends TestCase
         $request = $this->createMock(Request::class);
         $request->method('getParam')->willReturnCallback(function (string $key) {
             if ('searchtags' === $key) {
-                return 'abc def';
+                return 'abc@def';
             }
             if ('searchterm' === $key) {
                 return 'ghi jkl';
@@ -204,7 +204,7 @@ class BookmarkListControllerTest extends TestCase
             ->expects(static::once())
             ->method('search')
             ->with(
-                ['searchtags' => 'abc def', 'searchterm' => 'ghi jkl'],
+                ['searchtags' => 'abc@def', 'searchterm' => 'ghi jkl'],
                 'private',
                 false,
                 true
@@ -222,7 +222,7 @@ class BookmarkListControllerTest extends TestCase
         static::assertSame('linklist', (string) $result->getBody());
 
         static::assertSame('Search: ghi jkl [abc] [def] - Shaarli', $assignedVariables['pagetitle']);
-        static::assertSame('?page=2&searchterm=ghi+jkl&searchtags=abc+def', $assignedVariables['previous_page_url']);
+        static::assertSame('?page=2&searchterm=ghi+jkl&searchtags=abc%40def', $assignedVariables['previous_page_url']);
     }
 
     /**
@@ -292,6 +292,37 @@ class BookmarkListControllerTest extends TestCase
     }
 
     /**
+     * Test GET /shaare/{hash}?key={key} - Find a link by hash using a private link.
+     */
+    public function testPermalinkWithPrivateKey(): void
+    {
+        $hash = 'abcdef';
+        $privateKey = 'this is a private key';
+
+        $assignedVariables = [];
+        $this->assignTemplateVars($assignedVariables);
+
+        $request = $this->createMock(Request::class);
+        $request->method('getParam')->willReturnCallback(function (string $key, $default = null) use ($privateKey) {
+            return $key === 'key' ? $privateKey : $default;
+        });
+        $response = new Response();
+
+        $this->container->bookmarkService
+            ->expects(static::once())
+            ->method('findByHash')
+            ->with($hash, $privateKey)
+            ->willReturn((new Bookmark())->setId(123)->setTitle('Title 1')->setUrl('http://url1.tld'))
+        ;
+
+        $result = $this->controller->permalink($request, $response, ['hash' => $hash]);
+
+        static::assertSame(200, $result->getStatusCode());
+        static::assertSame('linklist', (string) $result->getBody());
+        static::assertCount(1, $assignedVariables['links']);
+    }
+
+    /**
      * Test getting link list with thumbnail updates.
      *   -> 2 thumbnails update, only 1 datastore write
      */
@@ -307,7 +338,13 @@ class BookmarkListControllerTest extends TestCase
         $this->container->conf
             ->method('get')
             ->willReturnCallback(function (string $key, $default) {
-                return $key === 'thumbnails.mode' ? Thumbnailer::MODE_ALL : $default;
+                if ($key === 'thumbnails.mode') {
+                    return Thumbnailer::MODE_ALL;
+                } elseif ($key === 'general.enable_async_metadata') {
+                    return false;
+                }
+
+                return $default;
             })
         ;
 
@@ -357,7 +394,13 @@ class BookmarkListControllerTest extends TestCase
         $this->container->conf
             ->method('get')
             ->willReturnCallback(function (string $key, $default) {
-                return $key === 'thumbnails.mode' ? Thumbnailer::MODE_ALL : $default;
+                if ($key === 'thumbnails.mode') {
+                    return Thumbnailer::MODE_ALL;
+                } elseif ($key === 'general.enable_async_metadata') {
+                    return false;
+                }
+
+                return $default;
             })
         ;
 
@@ -379,6 +422,47 @@ class BookmarkListControllerTest extends TestCase
     }
 
     /**
+     * Test getting a permalink with thumbnail update with async setting: no update should run.
+     */
+    public function testThumbnailUpdateFromPermalinkAsync(): void
+    {
+        $request = $this->createMock(Request::class);
+        $response = new Response();
+
+        $this->container->loginManager = $this->createMock(LoginManager::class);
+        $this->container->loginManager->method('isLoggedIn')->willReturn(true);
+
+        $this->container->conf = $this->createMock(ConfigManager::class);
+        $this->container->conf
+            ->method('get')
+            ->willReturnCallback(function (string $key, $default) {
+                if ($key === 'thumbnails.mode') {
+                    return Thumbnailer::MODE_ALL;
+                } elseif ($key === 'general.enable_async_metadata') {
+                    return true;
+                }
+
+                return $default;
+            })
+        ;
+
+        $this->container->thumbnailer = $this->createMock(Thumbnailer::class);
+        $this->container->thumbnailer->expects(static::never())->method('get');
+
+        $this->container->bookmarkService
+            ->expects(static::once())
+            ->method('findByHash')
+            ->willReturn((new Bookmark())->setId(2)->setUrl('https://url.tld')->setTitle('Title 1'))
+        ;
+        $this->container->bookmarkService->expects(static::never())->method('set');
+        $this->container->bookmarkService->expects(static::never())->method('save');
+
+        $result = $this->controller->permalink($request, $response, ['hash' => 'abc']);
+
+        static::assertSame(200, $result->getStatusCode());
+    }
+
+    /**
      * Trigger legacy controller in link list controller: permalink
      */
     public function testLegacyControllerPermalink(): void
diff --git a/tests/front/controller/visitor/DailyControllerTest.php b/tests/front/controller/visitor/DailyControllerTest.php
index fc78bc13..70fbce54 100644
--- a/tests/front/controller/visitor/DailyControllerTest.php
+++ b/tests/front/controller/visitor/DailyControllerTest.php
@@ -28,52 +28,49 @@ class DailyControllerTest extends TestCase
     public function testValidIndexControllerInvokeDefault(): void
     {
         $currentDay = new \DateTimeImmutable('2020-05-13');
+        $previousDate = new \DateTime('2 days ago 00:00:00');
+        $nextDate = new \DateTime('today 00:00:00');
 
         $request = $this->createMock(Request::class);
-        $request->method('getQueryParam')->willReturn($currentDay->format('Ymd'));
+        $request->method('getQueryParam')->willReturnCallback(function (string $key) use ($currentDay): ?string {
+            return $key === 'day' ? $currentDay->format('Ymd') : null;
+        });
         $response = new Response();
 
         // Save RainTPL assigned variables
         $assignedVariables = [];
         $this->assignTemplateVars($assignedVariables);
 
-        // Links dataset: 2 links with thumbnails
-        $this->container->bookmarkService
-            ->expects(static::once())
-            ->method('days')
-            ->willReturnCallback(function () use ($currentDay): array {
-               return [
-                   '20200510',
-                   $currentDay->format('Ymd'),
-                   '20200516',
-               ];
-            })
-        ;
         $this->container->bookmarkService
             ->expects(static::once())
-            ->method('filterDay')
-            ->willReturnCallback(function (): array {
-                return [
-                    (new Bookmark())
-                        ->setId(1)
-                        ->setUrl('http://url.tld')
-                        ->setTitle(static::generateString(50))
-                        ->setDescription(static::generateString(500))
-                    ,
-                    (new Bookmark())
-                        ->setId(2)
-                        ->setUrl('http://url2.tld')
-                        ->setTitle(static::generateString(50))
-                        ->setDescription(static::generateString(500))
-                    ,
-                    (new Bookmark())
-                        ->setId(3)
-                        ->setUrl('http://url3.tld')
-                        ->setTitle(static::generateString(50))
-                        ->setDescription(static::generateString(500))
-                    ,
-                ];
-            })
+            ->method('findByDate')
+            ->willReturnCallback(
+                function ($from, $to, &$previous, &$next) use ($currentDay, $previousDate, $nextDate): array {
+                    $previous = $previousDate;
+                    $next = $nextDate;
+
+                    return [
+                        (new Bookmark())
+                            ->setId(1)
+                            ->setUrl('http://url.tld')
+                            ->setTitle(static::generateString(50))
+                            ->setDescription(static::generateString(500))
+                        ,
+                        (new Bookmark())
+                            ->setId(2)
+                            ->setUrl('http://url2.tld')
+                            ->setTitle(static::generateString(50))
+                            ->setDescription(static::generateString(500))
+                        ,
+                        (new Bookmark())
+                            ->setId(3)
+                            ->setUrl('http://url3.tld')
+                            ->setTitle(static::generateString(50))
+                            ->setDescription(static::generateString(500))
+                        ,
+                    ];
+                }
+            )
         ;
 
         // Make sure that PluginManager hook is triggered
@@ -81,20 +78,22 @@ class DailyControllerTest extends TestCase
             ->expects(static::atLeastOnce())
             ->method('executeHooks')
             ->withConsecutive(['render_daily'])
-            ->willReturnCallback(function (string $hook, array $data, array $param) use ($currentDay): array {
-                if ('render_daily' === $hook) {
-                    static::assertArrayHasKey('linksToDisplay', $data);
-                    static::assertCount(3, $data['linksToDisplay']);
-                    static::assertSame(1, $data['linksToDisplay'][0]['id']);
-                    static::assertSame($currentDay->getTimestamp(), $data['day']);
-                    static::assertSame('20200510', $data['previousday']);
-                    static::assertSame('20200516', $data['nextday']);
-
-                    static::assertArrayHasKey('loggedin', $param);
+            ->willReturnCallback(
+                function (string $hook, array $data, array $param) use ($currentDay, $previousDate, $nextDate): array {
+                    if ('render_daily' === $hook) {
+                        static::assertArrayHasKey('linksToDisplay', $data);
+                        static::assertCount(3, $data['linksToDisplay']);
+                        static::assertSame(1, $data['linksToDisplay'][0]['id']);
+                        static::assertSame($currentDay->getTimestamp(), $data['day']);
+                        static::assertSame($previousDate->format('Ymd'), $data['previousday']);
+                        static::assertSame($nextDate->format('Ymd'), $data['nextday']);
+
+                        static::assertArrayHasKey('loggedin', $param);
+                    }
+
+                    return $data;
                 }
-
-                return $data;
-            })
+            )
         ;
 
         $result = $this->controller->index($request, $response);
@@ -107,6 +106,11 @@ class DailyControllerTest extends TestCase
         );
         static::assertEquals($currentDay, $assignedVariables['dayDate']);
         static::assertEquals($currentDay->getTimestamp(), $assignedVariables['day']);
+        static::assertSame($previousDate->format('Ymd'), $assignedVariables['previousday']);
+        static::assertSame($nextDate->format('Ymd'), $assignedVariables['nextday']);
+        static::assertSame('day', $assignedVariables['type']);
+        static::assertSame('May 13, 2020', $assignedVariables['dayDesc']);
+        static::assertSame('Daily', $assignedVariables['localizedType']);
         static::assertCount(3, $assignedVariables['linksToDisplay']);
 
         $link = $assignedVariables['linksToDisplay'][0];
@@ -171,27 +175,20 @@ class DailyControllerTest extends TestCase
         $currentDay = new \DateTimeImmutable('2020-05-13');
 
         $request = $this->createMock(Request::class);
+        $request->method('getQueryParam')->willReturnCallback(function (string $key) use ($currentDay): ?string {
+            return $key === 'day' ? $currentDay->format('Ymd') : null;
+        });
         $response = new Response();
 
         // Save RainTPL assigned variables
         $assignedVariables = [];
         $this->assignTemplateVars($assignedVariables);
 
-        // Links dataset: 2 links with thumbnails
         $this->container->bookmarkService
             ->expects(static::once())
-            ->method('days')
+            ->method('findByDate')
             ->willReturnCallback(function () use ($currentDay): array {
                 return [
-                    $currentDay->format($currentDay->format('Ymd')),
-                ];
-            })
-        ;
-        $this->container->bookmarkService
-            ->expects(static::once())
-            ->method('filterDay')
-            ->willReturnCallback(function (): array {
-                return [
                     (new Bookmark())
                         ->setId(1)
                         ->setUrl('http://url.tld')
@@ -250,21 +247,11 @@ class DailyControllerTest extends TestCase
         $assignedVariables = [];
         $this->assignTemplateVars($assignedVariables);
 
-        // Links dataset: 2 links with thumbnails
         $this->container->bookmarkService
             ->expects(static::once())
-            ->method('days')
+            ->method('findByDate')
             ->willReturnCallback(function () use ($currentDay): array {
                 return [
-                    $currentDay->format($currentDay->format('Ymd')),
-                ];
-            })
-        ;
-        $this->container->bookmarkService
-            ->expects(static::once())
-            ->method('filterDay')
-            ->willReturnCallback(function (): array {
-                return [
                     (new Bookmark())->setId(1)->setUrl('http://url.tld')->setTitle('title'),
                     (new Bookmark())
                         ->setId(2)
@@ -320,14 +307,7 @@ class DailyControllerTest extends TestCase
         // Links dataset: 2 links with thumbnails
         $this->container->bookmarkService
             ->expects(static::once())
-            ->method('days')
-            ->willReturnCallback(function (): array {
-                return [];
-            })
-        ;
-        $this->container->bookmarkService
-            ->expects(static::once())
-            ->method('filterDay')
+            ->method('findByDate')
             ->willReturnCallback(function (): array {
                 return [];
             })
@@ -347,7 +327,7 @@ class DailyControllerTest extends TestCase
         static::assertSame(200, $result->getStatusCode());
         static::assertSame('daily', (string) $result->getBody());
         static::assertCount(0, $assignedVariables['linksToDisplay']);
-        static::assertSame('Today', $assignedVariables['dayDesc']);
+        static::assertSame('Today - ' . (new \DateTime())->format('F j, Y'), $assignedVariables['dayDesc']);
         static::assertEquals((new \DateTime())->setTime(0, 0)->getTimestamp(), $assignedVariables['day']);
         static::assertEquals((new \DateTime())->setTime(0, 0), $assignedVariables['dayDate']);
     }
@@ -361,6 +341,7 @@ class DailyControllerTest extends TestCase
             new \DateTimeImmutable('2020-05-17'),
             new \DateTimeImmutable('2020-05-15'),
             new \DateTimeImmutable('2020-05-13'),
+            new \DateTimeImmutable('+1 month'),
         ];
 
         $request = $this->createMock(Request::class);
@@ -371,6 +352,7 @@ class DailyControllerTest extends TestCase
             (new Bookmark())->setId(2)->setCreated($dates[1])->setUrl('http://domain.tld/2'),
             (new Bookmark())->setId(3)->setCreated($dates[1])->setUrl('http://domain.tld/3'),
             (new Bookmark())->setId(4)->setCreated($dates[2])->setUrl('http://domain.tld/4'),
+            (new Bookmark())->setId(5)->setCreated($dates[3])->setUrl('http://domain.tld/5'),
         ]);
 
         $this->container->pageCacheManager
@@ -397,13 +379,14 @@ class DailyControllerTest extends TestCase
         static::assertSame('http://shaarli/subfolder/', $assignedVariables['index_url']);
         static::assertSame('http://shaarli/subfolder/daily-rss', $assignedVariables['page_url']);
         static::assertFalse($assignedVariables['hide_timestamps']);
-        static::assertCount(2, $assignedVariables['days']);
+        static::assertCount(3, $assignedVariables['days']);
 
         $day = $assignedVariables['days'][$dates[0]->format('Ymd')];
+        $date = $dates[0]->setTime(23, 59, 59);
 
-        static::assertEquals($dates[0], $day['date']);
-        static::assertSame($dates[0]->format(\DateTime::RSS), $day['date_rss']);
-        static::assertSame(format_date($dates[0], false), $day['date_human']);
+        static::assertEquals($date, $day['date']);
+        static::assertSame($date->format(\DateTime::RSS), $day['date_rss']);
+        static::assertSame(format_date($date, false), $day['date_human']);
         static::assertSame('http://shaarli/subfolder/daily?day='. $dates[0]->format('Ymd'), $day['absolute_url']);
         static::assertCount(1, $day['links']);
         static::assertSame(1, $day['links'][0]['id']);
@@ -411,10 +394,11 @@ class DailyControllerTest extends TestCase
         static::assertEquals($dates[0], $day['links'][0]['created']);
 
         $day = $assignedVariables['days'][$dates[1]->format('Ymd')];
+        $date = $dates[1]->setTime(23, 59, 59);
 
-        static::assertEquals($dates[1], $day['date']);
-        static::assertSame($dates[1]->format(\DateTime::RSS), $day['date_rss']);
-        static::assertSame(format_date($dates[1], false), $day['date_human']);
+        static::assertEquals($date, $day['date']);
+        static::assertSame($date->format(\DateTime::RSS), $day['date_rss']);
+        static::assertSame(format_date($date, false), $day['date_human']);
         static::assertSame('http://shaarli/subfolder/daily?day='. $dates[1]->format('Ymd'), $day['absolute_url']);
         static::assertCount(2, $day['links']);
 
@@ -424,6 +408,18 @@ class DailyControllerTest extends TestCase
         static::assertSame(3, $day['links'][1]['id']);
         static::assertSame('http://domain.tld/3', $day['links'][1]['url']);
         static::assertEquals($dates[1], $day['links'][1]['created']);
+
+        $day = $assignedVariables['days'][$dates[2]->format('Ymd')];
+        $date = $dates[2]->setTime(23, 59, 59);
+
+        static::assertEquals($date, $day['date']);
+        static::assertSame($date->format(\DateTime::RSS), $day['date_rss']);
+        static::assertSame(format_date($date, false), $day['date_human']);
+        static::assertSame('http://shaarli/subfolder/daily?day='. $dates[2]->format('Ymd'), $day['absolute_url']);
+        static::assertCount(1, $day['links']);
+        static::assertSame(4, $day['links'][0]['id']);
+        static::assertSame('http://domain.tld/4', $day['links'][0]['url']);
+        static::assertEquals($dates[2], $day['links'][0]['created']);
     }
 
     /**
@@ -475,4 +471,246 @@ class DailyControllerTest extends TestCase
         static::assertFalse($assignedVariables['hide_timestamps']);
         static::assertCount(0, $assignedVariables['days']);
     }
+
+    /**
+     * Test simple display index with week parameter
+     */
+    public function testSimpleIndexWeekly(): void
+    {
+        $currentDay = new \DateTimeImmutable('2020-05-13');
+        $expectedDay = new \DateTimeImmutable('2020-05-11');
+
+        $request = $this->createMock(Request::class);
+        $request->method('getQueryParam')->willReturnCallback(function (string $key) use ($currentDay): ?string {
+            return $key === 'week' ? $currentDay->format('YW') : null;
+        });
+        $response = new Response();
+
+        // Save RainTPL assigned variables
+        $assignedVariables = [];
+        $this->assignTemplateVars($assignedVariables);
+
+        $this->container->bookmarkService
+            ->expects(static::once())
+            ->method('findByDate')
+            ->willReturnCallback(
+                function (): array {
+                    return [
+                        (new Bookmark())
+                            ->setId(1)
+                            ->setUrl('http://url.tld')
+                            ->setTitle(static::generateString(50))
+                            ->setDescription(static::generateString(500))
+                        ,
+                        (new Bookmark())
+                            ->setId(2)
+                            ->setUrl('http://url2.tld')
+                            ->setTitle(static::generateString(50))
+                            ->setDescription(static::generateString(500))
+                        ,
+                    ];
+                }
+            )
+        ;
+
+        $result = $this->controller->index($request, $response);
+
+        static::assertSame(200, $result->getStatusCode());
+        static::assertSame('daily', (string) $result->getBody());
+        static::assertSame(
+            'Weekly - Week 20 (May 11, 2020) - Shaarli',
+            $assignedVariables['pagetitle']
+        );
+
+        static::assertCount(2, $assignedVariables['linksToDisplay']);
+        static::assertEquals($expectedDay->setTime(0, 0), $assignedVariables['dayDate']);
+        static::assertSame($expectedDay->setTime(0, 0)->getTimestamp(), $assignedVariables['day']);
+        static::assertSame('', $assignedVariables['previousday']);
+        static::assertSame('', $assignedVariables['nextday']);
+        static::assertSame('Week 20 (May 11, 2020)', $assignedVariables['dayDesc']);
+        static::assertSame('week', $assignedVariables['type']);
+        static::assertSame('Weekly', $assignedVariables['localizedType']);
+    }
+
+    /**
+     * Test simple display index with month parameter
+     */
+    public function testSimpleIndexMonthly(): void
+    {
+        $currentDay = new \DateTimeImmutable('2020-05-13');
+        $expectedDay = new \DateTimeImmutable('2020-05-01');
+
+        $request = $this->createMock(Request::class);
+        $request->method('getQueryParam')->willReturnCallback(function (string $key) use ($currentDay): ?string {
+            return $key === 'month' ? $currentDay->format('Ym') : null;
+        });
+        $response = new Response();
+
+        // Save RainTPL assigned variables
+        $assignedVariables = [];
+        $this->assignTemplateVars($assignedVariables);
+
+        $this->container->bookmarkService
+            ->expects(static::once())
+            ->method('findByDate')
+            ->willReturnCallback(
+                function (): array {
+                    return [
+                        (new Bookmark())
+                            ->setId(1)
+                            ->setUrl('http://url.tld')
+                            ->setTitle(static::generateString(50))
+                            ->setDescription(static::generateString(500))
+                        ,
+                        (new Bookmark())
+                            ->setId(2)
+                            ->setUrl('http://url2.tld')
+                            ->setTitle(static::generateString(50))
+                            ->setDescription(static::generateString(500))
+                        ,
+                    ];
+                }
+            )
+        ;
+
+        $result = $this->controller->index($request, $response);
+
+        static::assertSame(200, $result->getStatusCode());
+        static::assertSame('daily', (string) $result->getBody());
+        static::assertSame(
+            'Monthly - May, 2020 - Shaarli',
+            $assignedVariables['pagetitle']
+        );
+
+        static::assertCount(2, $assignedVariables['linksToDisplay']);
+        static::assertEquals($expectedDay->setTime(0, 0), $assignedVariables['dayDate']);
+        static::assertSame($expectedDay->setTime(0, 0)->getTimestamp(), $assignedVariables['day']);
+        static::assertSame('', $assignedVariables['previousday']);
+        static::assertSame('', $assignedVariables['nextday']);
+        static::assertSame('May, 2020', $assignedVariables['dayDesc']);
+        static::assertSame('month', $assignedVariables['type']);
+        static::assertSame('Monthly', $assignedVariables['localizedType']);
+    }
+
+    /**
+     * Test simple display RSS with week parameter
+     */
+    public function testSimpleRssWeekly(): void
+    {
+        $dates = [
+            new \DateTimeImmutable('2020-05-19'),
+            new \DateTimeImmutable('2020-05-13'),
+        ];
+        $expectedDates = [
+            new \DateTimeImmutable('2020-05-24 23:59:59'),
+            new \DateTimeImmutable('2020-05-17 23:59:59'),
+        ];
+
+        $this->container->environment['QUERY_STRING'] = 'week';
+        $request = $this->createMock(Request::class);
+        $request->method('getQueryParam')->willReturnCallback(function (string $key): ?string {
+            return $key === 'week' ? '' : null;
+        });
+        $response = new Response();
+
+        $this->container->bookmarkService->expects(static::once())->method('search')->willReturn([
+            (new Bookmark())->setId(1)->setCreated($dates[0])->setUrl('http://domain.tld/1'),
+            (new Bookmark())->setId(2)->setCreated($dates[1])->setUrl('http://domain.tld/2'),
+            (new Bookmark())->setId(3)->setCreated($dates[1])->setUrl('http://domain.tld/3'),
+        ]);
+
+        // Save RainTPL assigned variables
+        $assignedVariables = [];
+        $this->assignTemplateVars($assignedVariables);
+
+        $result = $this->controller->rss($request, $response);
+
+        static::assertSame(200, $result->getStatusCode());
+        static::assertStringContainsString('application/rss', $result->getHeader('Content-Type')[0]);
+        static::assertSame('dailyrss', (string) $result->getBody());
+        static::assertSame('Shaarli', $assignedVariables['title']);
+        static::assertSame('http://shaarli/subfolder/', $assignedVariables['index_url']);
+        static::assertSame('http://shaarli/subfolder/daily-rss?week', $assignedVariables['page_url']);
+        static::assertFalse($assignedVariables['hide_timestamps']);
+        static::assertCount(2, $assignedVariables['days']);
+
+        $day = $assignedVariables['days'][$dates[0]->format('YW')];
+        $date = $expectedDates[0];
+
+        static::assertEquals($date, $day['date']);
+        static::assertSame($date->format(\DateTime::RSS), $day['date_rss']);
+        static::assertSame('Week 21 (May 18, 2020)', $day['date_human']);
+        static::assertSame('http://shaarli/subfolder/daily?week='. $dates[0]->format('YW'), $day['absolute_url']);
+        static::assertCount(1, $day['links']);
+
+        $day = $assignedVariables['days'][$dates[1]->format('YW')];
+        $date = $expectedDates[1];
+
+        static::assertEquals($date, $day['date']);
+        static::assertSame($date->format(\DateTime::RSS), $day['date_rss']);
+        static::assertSame('Week 20 (May 11, 2020)', $day['date_human']);
+        static::assertSame('http://shaarli/subfolder/daily?week='. $dates[1]->format('YW'), $day['absolute_url']);
+        static::assertCount(2, $day['links']);
+    }
+
+    /**
+     * Test simple display RSS with month parameter
+     */
+    public function testSimpleRssMonthly(): void
+    {
+        $dates = [
+            new \DateTimeImmutable('2020-05-19'),
+            new \DateTimeImmutable('2020-04-13'),
+        ];
+        $expectedDates = [
+            new \DateTimeImmutable('2020-05-31 23:59:59'),
+            new \DateTimeImmutable('2020-04-30 23:59:59'),
+        ];
+
+        $this->container->environment['QUERY_STRING'] = 'month';
+        $request = $this->createMock(Request::class);
+        $request->method('getQueryParam')->willReturnCallback(function (string $key): ?string {
+            return $key === 'month' ? '' : null;
+        });
+        $response = new Response();
+
+        $this->container->bookmarkService->expects(static::once())->method('search')->willReturn([
+            (new Bookmark())->setId(1)->setCreated($dates[0])->setUrl('http://domain.tld/1'),
+            (new Bookmark())->setId(2)->setCreated($dates[1])->setUrl('http://domain.tld/2'),
+            (new Bookmark())->setId(3)->setCreated($dates[1])->setUrl('http://domain.tld/3'),
+        ]);
+
+        // Save RainTPL assigned variables
+        $assignedVariables = [];
+        $this->assignTemplateVars($assignedVariables);
+
+        $result = $this->controller->rss($request, $response);
+
+        static::assertSame(200, $result->getStatusCode());
+        static::assertStringContainsString('application/rss', $result->getHeader('Content-Type')[0]);
+        static::assertSame('dailyrss', (string) $result->getBody());
+        static::assertSame('Shaarli', $assignedVariables['title']);
+        static::assertSame('http://shaarli/subfolder/', $assignedVariables['index_url']);
+        static::assertSame('http://shaarli/subfolder/daily-rss?month', $assignedVariables['page_url']);
+        static::assertFalse($assignedVariables['hide_timestamps']);
+        static::assertCount(2, $assignedVariables['days']);
+
+        $day = $assignedVariables['days'][$dates[0]->format('Ym')];
+        $date = $expectedDates[0];
+
+        static::assertEquals($date, $day['date']);
+        static::assertSame($date->format(\DateTime::RSS), $day['date_rss']);
+        static::assertSame('May, 2020', $day['date_human']);
+        static::assertSame('http://shaarli/subfolder/daily?month='. $dates[0]->format('Ym'), $day['absolute_url']);
+        static::assertCount(1, $day['links']);
+
+        $day = $assignedVariables['days'][$dates[1]->format('Ym')];
+        $date = $expectedDates[1];
+
+        static::assertEquals($date, $day['date']);
+        static::assertSame($date->format(\DateTime::RSS), $day['date_rss']);
+        static::assertSame('April, 2020', $day['date_human']);
+        static::assertSame('http://shaarli/subfolder/daily?month='. $dates[1]->format('Ym'), $day['absolute_url']);
+        static::assertCount(2, $day['links']);
+    }
 }
diff --git a/tests/front/controller/visitor/ErrorControllerTest.php b/tests/front/controller/visitor/ErrorControllerTest.php
index 75408cf4..e18a6fa2 100644
--- a/tests/front/controller/visitor/ErrorControllerTest.php
+++ b/tests/front/controller/visitor/ErrorControllerTest.php
@@ -50,7 +50,31 @@ class ErrorControllerTest extends TestCase
     }
 
     /**
-     * Test displaying error with any exception (no debug): only display an error occurred with HTTP 500.
+     * Test displaying error with any exception (no debug) while logged in:
+     * display full error details
+     */
+    public function testDisplayAnyExceptionErrorNoDebugLoggedIn(): void
+    {
+        $request = $this->createMock(Request::class);
+        $response = new Response();
+
+        // Save RainTPL assigned variables
+        $assignedVariables = [];
+        $this->assignTemplateVars($assignedVariables);
+
+        $this->container->loginManager->method('isLoggedIn')->willReturn(true);
+
+        $result = ($this->controller)($request, $response, new \Exception('abc'));
+
+        static::assertSame(500, $result->getStatusCode());
+        static::assertSame('Error: abc', $assignedVariables['message']);
+        static::assertContainsPolyfill('Please report it on Github', $assignedVariables['text']);
+        static::assertArrayHasKey('stacktrace', $assignedVariables);
+    }
+
+    /**
+     * Test displaying error with any exception (no debug) while logged out:
+     * display standard error without detail
      */
     public function testDisplayAnyExceptionErrorNoDebug(): void
     {
@@ -61,10 +85,13 @@ class ErrorControllerTest extends TestCase
         $assignedVariables = [];
         $this->assignTemplateVars($assignedVariables);
 
+        $this->container->loginManager->method('isLoggedIn')->willReturn(false);
+
         $result = ($this->controller)($request, $response, new \Exception('abc'));
 
         static::assertSame(500, $result->getStatusCode());
         static::assertSame('An unexpected error occurred.', $assignedVariables['message']);
+        static::assertArrayNotHasKey('text', $assignedVariables);
         static::assertArrayNotHasKey('stacktrace', $assignedVariables);
     }
 }
diff --git a/tests/front/controller/visitor/FrontControllerMockHelper.php b/tests/front/controller/visitor/FrontControllerMockHelper.php
index fc0bb7d1..02229f68 100644
--- a/tests/front/controller/visitor/FrontControllerMockHelper.php
+++ b/tests/front/controller/visitor/FrontControllerMockHelper.php
@@ -41,6 +41,10 @@ trait FrontControllerMockHelper
         // Config
         $this->container->conf = $this->createMock(ConfigManager::class);
         $this->container->conf->method('get')->willReturnCallback(function (string $parameter, $default) {
+            if ($parameter === 'general.tags_separator') {
+                return '@';
+            }
+
             return $default === null ? $parameter : $default;
         });
 
diff --git a/tests/front/controller/visitor/InstallControllerTest.php b/tests/front/controller/visitor/InstallControllerTest.php
index 345ad544..2105ed77 100644
--- a/tests/front/controller/visitor/InstallControllerTest.php
+++ b/tests/front/controller/visitor/InstallControllerTest.php
@@ -79,6 +79,15 @@ class InstallControllerTest extends TestCase
         static::assertIsArray($assignedVariables['languages']);
         static::assertSame('Automatic', $assignedVariables['languages']['auto']);
         static::assertSame('French', $assignedVariables['languages']['fr']);
+
+        static::assertSame(PHP_VERSION, $assignedVariables['php_version']);
+        static::assertArrayHasKey('php_has_reached_eol', $assignedVariables);
+        static::assertArrayHasKey('php_eol', $assignedVariables);
+        static::assertArrayHasKey('php_extensions', $assignedVariables);
+        static::assertArrayHasKey('permissions', $assignedVariables);
+        static::assertEmpty($assignedVariables['permissions']);
+
+        static::assertSame('Install Shaarli', $assignedVariables['pagetitle']);
     }
 
     /**
diff --git a/tests/front/controller/visitor/LoginControllerTest.php b/tests/front/controller/visitor/LoginControllerTest.php
index 1312ccb7..00d9eab3 100644
--- a/tests/front/controller/visitor/LoginControllerTest.php
+++ b/tests/front/controller/visitor/LoginControllerTest.php
@@ -195,7 +195,7 @@ class LoginControllerTest extends TestCase
         $this->container->loginManager
             ->expects(static::once())
             ->method('checkCredentials')
-            ->with('1.2.3.4', '1.2.3.4', 'bob', 'pass')
+            ->with('1.2.3.4', 'bob', 'pass')
             ->willReturn(true)
         ;
         $this->container->loginManager->method('getStaySignedInToken')->willReturn(bin2hex(random_bytes(8)));
diff --git a/tests/front/controller/visitor/TagCloudControllerTest.php b/tests/front/controller/visitor/TagCloudControllerTest.php
index 9305612e..4915573d 100644
--- a/tests/front/controller/visitor/TagCloudControllerTest.php
+++ b/tests/front/controller/visitor/TagCloudControllerTest.php
@@ -100,7 +100,7 @@ class TagCloudControllerTest extends TestCase
             ->with()
             ->willReturnCallback(function (string $key): ?string {
                 if ('searchtags' === $key) {
-                    return 'ghi def';
+                    return 'ghi@def';
                 }
 
                 return null;
@@ -131,7 +131,7 @@ class TagCloudControllerTest extends TestCase
             ->withConsecutive(['render_tagcloud'])
             ->willReturnCallback(function (string $hook, array $data, array $param): array {
                if ('render_tagcloud' === $hook) {
-                   static::assertSame('ghi def', $data['search_tags']);
+                   static::assertSame('ghi@def@', $data['search_tags']);
                    static::assertCount(1, $data['tags']);
 
                    static::assertArrayHasKey('loggedin', $param);
@@ -147,7 +147,7 @@ class TagCloudControllerTest extends TestCase
         static::assertSame('tag.cloud', (string) $result->getBody());
         static::assertSame('ghi def - Tag cloud - Shaarli', $assignedVariables['pagetitle']);
 
-        static::assertSame('ghi def', $assignedVariables['search_tags']);
+        static::assertSame('ghi@def@', $assignedVariables['search_tags']);
         static::assertCount(1, $assignedVariables['tags']);
 
         static::assertArrayHasKey('abc', $assignedVariables['tags']);
@@ -277,7 +277,7 @@ class TagCloudControllerTest extends TestCase
             ->with()
             ->willReturnCallback(function (string $key): ?string {
                 if ('searchtags' === $key) {
-                    return 'ghi def';
+                    return 'ghi@def';
                 } elseif ('sort' === $key) {
                     return 'alpha';
                 }
@@ -310,7 +310,7 @@ class TagCloudControllerTest extends TestCase
             ->withConsecutive(['render_taglist'])
             ->willReturnCallback(function (string $hook, array $data, array $param): array {
                 if ('render_taglist' === $hook) {
-                    static::assertSame('ghi def', $data['search_tags']);
+                    static::assertSame('ghi@def@', $data['search_tags']);
                     static::assertCount(1, $data['tags']);
 
                     static::assertArrayHasKey('loggedin', $param);
@@ -326,7 +326,7 @@ class TagCloudControllerTest extends TestCase
         static::assertSame('tag.list', (string) $result->getBody());
         static::assertSame('ghi def - Tag list - Shaarli', $assignedVariables['pagetitle']);
 
-        static::assertSame('ghi def', $assignedVariables['search_tags']);
+        static::assertSame('ghi@def@', $assignedVariables['search_tags']);
         static::assertCount(1, $assignedVariables['tags']);
         static::assertSame(3, $assignedVariables['tags']['abc']);
     }
diff --git a/tests/front/controller/visitor/TagControllerTest.php b/tests/front/controller/visitor/TagControllerTest.php
index 750ea02d..5a556c6d 100644
--- a/tests/front/controller/visitor/TagControllerTest.php
+++ b/tests/front/controller/visitor/TagControllerTest.php
@@ -50,7 +50,7 @@ class TagControllerTest extends TestCase
 
         static::assertInstanceOf(Response::class, $result);
         static::assertSame(302, $result->getStatusCode());
-        static::assertSame(['/controller/?searchtags=def+abc'], $result->getHeader('location'));
+        static::assertSame(['/controller/?searchtags=def%40abc'], $result->getHeader('location'));
     }
 
     public function testAddTagWithoutRefererAndExistingSearch(): void
@@ -80,7 +80,7 @@ class TagControllerTest extends TestCase
 
         static::assertInstanceOf(Response::class, $result);
         static::assertSame(302, $result->getStatusCode());
-        static::assertSame(['/controller/?searchtags=def+abc'], $result->getHeader('location'));
+        static::assertSame(['/controller/?searchtags=def%40abc'], $result->getHeader('location'));
     }
 
     public function testAddTagResetPagination(): void
@@ -96,7 +96,7 @@ class TagControllerTest extends TestCase
 
         static::assertInstanceOf(Response::class, $result);
         static::assertSame(302, $result->getStatusCode());
-        static::assertSame(['/controller/?searchtags=def+abc'], $result->getHeader('location'));
+        static::assertSame(['/controller/?searchtags=def%40abc'], $result->getHeader('location'));
     }
 
     public function testAddTagWithRefererAndEmptySearch(): void
diff --git a/tests/ApplicationUtilsTest.php b/tests/helper/ApplicationUtilsTest.php
index a232b351..654857b9 100644
--- a/tests/ApplicationUtilsTest.php
+++ b/tests/helper/ApplicationUtilsTest.php
@@ -1,7 +1,8 @@
 <?php
-namespace Shaarli;
+namespace Shaarli\Helper;
 
 use Shaarli\Config\ConfigManager;
+use Shaarli\FakeApplicationUtils;
 
 require_once 'tests/utils/FakeApplicationUtils.php';
 
@@ -340,6 +341,35 @@ class ApplicationUtilsTest extends \Shaarli\TestCase
     }
 
     /**
+     * Checks resource permissions in minimal mode.
+     */
+    public function testCheckCurrentResourcePermissionsErrorsMinimalMode(): void
+    {
+        $conf = new ConfigManager('');
+        $conf->set('resource.thumbnails_cache', 'null/cache');
+        $conf->set('resource.config', 'null/data/config.php');
+        $conf->set('resource.data_dir', 'null/data');
+        $conf->set('resource.datastore', 'null/data/store.php');
+        $conf->set('resource.ban_file', 'null/data/ipbans.php');
+        $conf->set('resource.log', 'null/data/log.txt');
+        $conf->set('resource.page_cache', 'null/pagecache');
+        $conf->set('resource.raintpl_tmp', 'null/tmp');
+        $conf->set('resource.raintpl_tpl', 'null/tpl');
+        $conf->set('resource.raintpl_theme', 'null/tpl/default');
+        $conf->set('resource.update_check', 'null/data/lastupdatecheck.txt');
+
+        static::assertSame(
+            [
+                '"null/tpl" directory is not readable',
+                '"null/tpl/default" directory is not readable',
+                '"null/tmp" directory is not readable',
+                '"null/tmp" directory is not writable'
+            ],
+            ApplicationUtils::checkResourcePermissions($conf, true)
+        );
+    }
+
+    /**
      * Check update with 'dev' as curent version (master branch).
      * It should always return false.
      */
@@ -349,4 +379,37 @@ class ApplicationUtilsTest extends \Shaarli\TestCase
             ApplicationUtils::checkUpdate('dev', self::$testUpdateFile, 100, true, true)
         );
     }
+
+    /**
+     * Basic test of getPhpExtensionsRequirement()
+     */
+    public function testGetPhpExtensionsRequirementSimple(): void
+    {
+        static::assertCount(8, ApplicationUtils::getPhpExtensionsRequirement());
+        static::assertSame([
+            'name' => 'json',
+            'required' => true,
+            'desc' => 'Configuration parsing',
+            'loaded' => true,
+        ], ApplicationUtils::getPhpExtensionsRequirement()[0]);
+    }
+
+    /**
+     * Test getPhpEol with a known version: 7.4 -> 2022
+     */
+    public function testGetKnownPhpEol(): void
+    {
+        static::assertSame('2022-11-28', ApplicationUtils::getPhpEol('7.4.7'));
+    }
+
+    /**
+     * Test getPhpEol with an unknown version: 7.4 -> 2022
+     */
+    public function testGetUnknownPhpEol(): void
+    {
+        static::assertSame(
+            (((int) (new \DateTime())->format('Y')) + 2) . (new \DateTime())->format('-m-d'),
+            ApplicationUtils::getPhpEol('7.51.34')
+        );
+    }
 }
diff --git a/tests/helper/DailyPageHelperTest.php b/tests/helper/DailyPageHelperTest.php
new file mode 100644
index 00000000..5255b7b1
--- /dev/null
+++ b/tests/helper/DailyPageHelperTest.php
@@ -0,0 +1,262 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shaarli\Helper;
+
+use Shaarli\Bookmark\Bookmark;
+use Shaarli\TestCase;
+use Slim\Http\Request;
+
+class DailyPageHelperTest extends TestCase
+{
+    /**
+     * @dataProvider getRequestedTypes
+     */
+    public function testExtractRequestedType(array $queryParams, string $expectedType): void
+    {
+        $request = $this->createMock(Request::class);
+        $request->method('getQueryParam')->willReturnCallback(function ($key) use ($queryParams): ?string {
+            return $queryParams[$key] ?? null;
+        });
+
+        $type = DailyPageHelper::extractRequestedType($request);
+
+        static::assertSame($type, $expectedType);
+    }
+
+    /**
+     * @dataProvider getRequestedDateTimes
+     */
+    public function testExtractRequestedDateTime(
+        string $type,
+        string $input,
+        ?Bookmark $bookmark,
+        \DateTimeInterface $expectedDateTime,
+        string $compareFormat = 'Ymd'
+    ): void {
+        $dateTime = DailyPageHelper::extractRequestedDateTime($type, $input, $bookmark);
+
+        static::assertSame($dateTime->format($compareFormat), $expectedDateTime->format($compareFormat));
+    }
+
+    public function testExtractRequestedDateTimeExceptionUnknownType(): void
+    {
+        $this->expectException(\Exception::class);
+        $this->expectExceptionMessage('Unsupported daily format type');
+
+        DailyPageHelper::extractRequestedDateTime('nope', null, null);
+    }
+
+    /**
+     * @dataProvider getFormatsByType
+     */
+    public function testGetFormatByType(string $type, string $expectedFormat): void
+    {
+        $format = DailyPageHelper::getFormatByType($type);
+
+        static::assertSame($expectedFormat, $format);
+    }
+
+    public function testGetFormatByTypeExceptionUnknownType(): void
+    {
+        $this->expectException(\Exception::class);
+        $this->expectExceptionMessage('Unsupported daily format type');
+
+        DailyPageHelper::getFormatByType('nope');
+    }
+
+    /**
+     * @dataProvider getStartDatesByType
+     */
+    public function testGetStartDatesByType(
+        string $type,
+        \DateTimeImmutable $dateTime,
+        \DateTimeInterface $expectedDateTime
+    ): void {
+        $startDateTime = DailyPageHelper::getStartDateTimeByType($type, $dateTime);
+
+        static::assertEquals($expectedDateTime, $startDateTime);
+    }
+
+    public function testGetStartDatesByTypeExceptionUnknownType(): void
+    {
+        $this->expectException(\Exception::class);
+        $this->expectExceptionMessage('Unsupported daily format type');
+
+        DailyPageHelper::getStartDateTimeByType('nope', new \DateTimeImmutable());
+    }
+
+    /**
+     * @dataProvider getEndDatesByType
+     */
+    public function testGetEndDatesByType(
+        string $type,
+        \DateTimeImmutable $dateTime,
+        \DateTimeInterface $expectedDateTime
+    ): void {
+        $endDateTime = DailyPageHelper::getEndDateTimeByType($type, $dateTime);
+
+        static::assertEquals($expectedDateTime, $endDateTime);
+    }
+
+    public function testGetEndDatesByTypeExceptionUnknownType(): void
+    {
+        $this->expectException(\Exception::class);
+        $this->expectExceptionMessage('Unsupported daily format type');
+
+        DailyPageHelper::getEndDateTimeByType('nope', new \DateTimeImmutable());
+    }
+
+    /**
+     * @dataProvider getDescriptionsByType
+     */
+    public function testGeDescriptionsByType(
+        string $type,
+        \DateTimeImmutable $dateTime,
+        string $expectedDescription
+    ): void {
+        $description = DailyPageHelper::getDescriptionByType($type, $dateTime);
+
+        static::assertEquals($expectedDescription, $description);
+    }
+
+    public function getDescriptionByTypeExceptionUnknownType(): void
+    {
+        $this->expectException(\Exception::class);
+        $this->expectExceptionMessage('Unsupported daily format type');
+
+        DailyPageHelper::getDescriptionByType('nope', new \DateTimeImmutable());
+    }
+
+    /**
+     * @dataProvider getRssLengthsByType
+     */
+    public function testGeRssLengthsByType(string $type): void {
+        $length = DailyPageHelper::getRssLengthByType($type);
+
+        static::assertIsInt($length);
+    }
+
+    public function testGeRssLengthsByTypeExceptionUnknownType(): void
+    {
+        $this->expectException(\Exception::class);
+        $this->expectExceptionMessage('Unsupported daily format type');
+
+        DailyPageHelper::getRssLengthByType('nope');
+    }
+
+    /**
+     * Data provider for testExtractRequestedType() test method.
+     */
+    public function getRequestedTypes(): array
+    {
+        return [
+            [['month' => null], DailyPageHelper::DAY],
+            [['month' => ''], DailyPageHelper::MONTH],
+            [['month' => 'content'], DailyPageHelper::MONTH],
+            [['week' => null], DailyPageHelper::DAY],
+            [['week' => ''], DailyPageHelper::WEEK],
+            [['week' => 'content'], DailyPageHelper::WEEK],
+            [['day' => null], DailyPageHelper::DAY],
+            [['day' => ''], DailyPageHelper::DAY],
+            [['day' => 'content'], DailyPageHelper::DAY],
+        ];
+    }
+
+    /**
+     * Data provider for testExtractRequestedDateTime() test method.
+     */
+    public function getRequestedDateTimes(): array
+    {
+        return [
+            [DailyPageHelper::DAY, '20201013', null, new \DateTime('2020-10-13')],
+            [
+                DailyPageHelper::DAY,
+                '',
+                (new Bookmark())->setCreated($date = new \DateTime('2020-10-13 12:05:31')),
+                $date,
+            ],
+            [DailyPageHelper::DAY, '', null, new \DateTime()],
+            [DailyPageHelper::WEEK, '202030', null, new \DateTime('2020-07-20')],
+            [
+                DailyPageHelper::WEEK,
+                '',
+                (new Bookmark())->setCreated($date = new \DateTime('2020-10-13 12:05:31')),
+                new \DateTime('2020-10-13'),
+            ],
+            [DailyPageHelper::WEEK, '', null, new \DateTime(), 'Ym'],
+            [DailyPageHelper::MONTH, '202008', null, new \DateTime('2020-08-01'), 'Ym'],
+            [
+                DailyPageHelper::MONTH,
+                '',
+                (new Bookmark())->setCreated($date = new \DateTime('2020-10-13 12:05:31')),
+                new \DateTime('2020-10-13'),
+                'Ym'
+            ],
+            [DailyPageHelper::MONTH, '', null, new \DateTime(), 'Ym'],
+        ];
+    }
+
+    /**
+     * Data provider for testGetFormatByType() test method.
+     */
+    public function getFormatsByType(): array
+    {
+        return [
+            [DailyPageHelper::DAY, 'Ymd'],
+            [DailyPageHelper::WEEK, 'YW'],
+            [DailyPageHelper::MONTH, 'Ym'],
+        ];
+    }
+
+    /**
+     * Data provider for testGetStartDatesByType() test method.
+     */
+    public function getStartDatesByType(): array
+    {
+        return [
+            [DailyPageHelper::DAY, new \DateTimeImmutable('2020-10-09 04:05:06'), new \DateTime('2020-10-09 00:00:00')],
+            [DailyPageHelper::WEEK, new \DateTimeImmutable('2020-10-09 04:05:06'), new \DateTime('2020-10-05 00:00:00')],
+            [DailyPageHelper::MONTH, new \DateTimeImmutable('2020-10-09 04:05:06'), new \DateTime('2020-10-01 00:00:00')],
+        ];
+    }
+
+    /**
+     * Data provider for testGetEndDatesByType() test method.
+     */
+    public function getEndDatesByType(): array
+    {
+        return [
+            [DailyPageHelper::DAY, new \DateTimeImmutable('2020-10-09 04:05:06'), new \DateTime('2020-10-09 23:59:59')],
+            [DailyPageHelper::WEEK, new \DateTimeImmutable('2020-10-09 04:05:06'), new \DateTime('2020-10-11 23:59:59')],
+            [DailyPageHelper::MONTH, new \DateTimeImmutable('2020-10-09 04:05:06'), new \DateTime('2020-10-31 23:59:59')],
+        ];
+    }
+
+    /**
+     * Data provider for testGetDescriptionsByType() test method.
+     */
+    public function getDescriptionsByType(): array
+    {
+        return [
+            [DailyPageHelper::DAY, $date = new \DateTimeImmutable(), 'Today - ' . $date->format('F j, Y')],
+            [DailyPageHelper::DAY, $date = new \DateTimeImmutable('-1 day'), 'Yesterday - ' . $date->format('F j, Y')],
+            [DailyPageHelper::DAY, new \DateTimeImmutable('2020-10-09 04:05:06'), 'October 9, 2020'],
+            [DailyPageHelper::WEEK, new \DateTimeImmutable('2020-10-09 04:05:06'), 'Week 41 (October 5, 2020)'],
+            [DailyPageHelper::MONTH, new \DateTimeImmutable('2020-10-09 04:05:06'), 'October, 2020'],
+        ];
+    }
+
+    /**
+     * Data provider for testGetDescriptionsByType() test method.
+     */
+    public function getRssLengthsByType(): array
+    {
+        return [
+            [DailyPageHelper::DAY],
+            [DailyPageHelper::WEEK],
+            [DailyPageHelper::MONTH],
+        ];
+    }
+}
diff --git a/tests/FileUtilsTest.php b/tests/helper/FileUtilsTest.php
index 9163bdf1..8035f79c 100644
--- a/tests/FileUtilsTest.php
+++ b/tests/helper/FileUtilsTest.php
@@ -1,27 +1,51 @@
 <?php
 
-namespace Shaarli;
+namespace Shaarli\Helper;
 
 use Exception;
+use Shaarli\Exceptions\IOException;
+use Shaarli\TestCase;
 
 /**
  * Class FileUtilsTest
  *
  * Test file utility class.
  */
-class FileUtilsTest extends \Shaarli\TestCase
+class FileUtilsTest extends TestCase
 {
     /**
      * @var string Test file path.
      */
     protected static $file = 'sandbox/flat.db';
 
+    protected function setUp(): void
+    {
+        @mkdir('sandbox');
+        mkdir('sandbox/folder2');
+        touch('sandbox/file1');
+        touch('sandbox/file2');
+        mkdir('sandbox/folder1');
+        touch('sandbox/folder1/file1');
+        touch('sandbox/folder1/file2');
+        mkdir('sandbox/folder3');
+        mkdir('/tmp/shaarli-to-delete');
+    }
+
     /**
      * Delete test file after every test.
      */
     protected function tearDown(): void
     {
         @unlink(self::$file);
+
+        @unlink('sandbox/folder1/file1');
+        @unlink('sandbox/folder1/file2');
+        @rmdir('sandbox/folder1');
+        @unlink('sandbox/file1');
+        @unlink('sandbox/file2');
+        @rmdir('sandbox/folder2');
+        @rmdir('sandbox/folder3');
+        @rmdir('/tmp/shaarli-to-delete');
     }
 
     /**
@@ -107,4 +131,67 @@ class FileUtilsTest extends \Shaarli\TestCase
         $this->assertEquals(null, FileUtils::readFlatDB(self::$file));
         $this->assertEquals(['test'], FileUtils::readFlatDB(self::$file, ['test']));
     }
+
+    /**
+     * Test clearFolder with self delete and excluded files
+     */
+    public function testClearFolderSelfDeleteWithExclusion(): void
+    {
+        FileUtils::clearFolder('sandbox', true, ['file2']);
+
+        static::assertFileExists('sandbox/folder1/file2');
+        static::assertFileExists('sandbox/folder1');
+        static::assertFileExists('sandbox/file2');
+        static::assertFileExists('sandbox');
+
+        static::assertFileNotExists('sandbox/folder1/file1');
+        static::assertFileNotExists('sandbox/file1');
+        static::assertFileNotExists('sandbox/folder3');
+    }
+
+    /**
+     * Test clearFolder with self delete and excluded files
+     */
+    public function testClearFolderSelfDeleteWithoutExclusion(): void
+    {
+        FileUtils::clearFolder('sandbox', true);
+
+        static::assertFileNotExists('sandbox');
+    }
+
+    /**
+     * Test clearFolder with self delete and excluded files
+     */
+    public function testClearFolderNoSelfDeleteWithoutExclusion(): void
+    {
+        FileUtils::clearFolder('sandbox', false);
+
+        static::assertFileExists('sandbox');
+
+        // 2 because '.' and '..'
+        static::assertCount(2, new \DirectoryIterator('sandbox'));
+    }
+
+    /**
+     * Test clearFolder on a file instead of a folder
+     */
+    public function testClearFolderOnANonDirectory(): void
+    {
+        $this->expectException(IOException::class);
+        $this->expectExceptionMessage('Provided path is not a directory.');
+
+        FileUtils::clearFolder('sandbox/file1', false);
+    }
+
+    /**
+     * Test clearFolder on a file instead of a folder
+     */
+    public function testClearFolderOutsideOfShaarliDirectory(): void
+    {
+        $this->expectException(IOException::class);
+        $this->expectExceptionMessage('Trying to delete a folder outside of Shaarli path.');
+
+
+        FileUtils::clearFolder('/tmp/shaarli-to-delete', true);
+    }
 }
diff --git a/tests/http/MetadataRetrieverTest.php b/tests/http/MetadataRetrieverTest.php
new file mode 100644
index 00000000..3c9eaa0e
--- /dev/null
+++ b/tests/http/MetadataRetrieverTest.php
@@ -0,0 +1,154 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shaarli\Http;
+
+use PHPUnit\Framework\TestCase;
+use Shaarli\Config\ConfigManager;
+
+class MetadataRetrieverTest extends TestCase
+{
+    /** @var MetadataRetriever */
+    protected $retriever;
+
+    /** @var ConfigManager */
+    protected $conf;
+
+    /** @var HttpAccess */
+    protected $httpAccess;
+
+    public function setUp(): void
+    {
+        $this->conf = $this->createMock(ConfigManager::class);
+        $this->httpAccess = $this->createMock(HttpAccess::class);
+        $this->retriever = new MetadataRetriever($this->conf, $this->httpAccess);
+
+        $this->conf->method('get')->willReturnCallback(function (string $param, $default) {
+            return $default === null ? $param : $default;
+        });
+    }
+
+    /**
+     * Test metadata retrieve() with values returned
+     */
+    public function testFullRetrieval(): void
+    {
+        $url = 'https://domain.tld/link';
+        $remoteTitle = 'Remote Title ';
+        $remoteDesc = 'Sometimes the meta description is relevant.';
+        $remoteTags = 'abc def';
+        $remoteCharset = 'utf-8';
+
+        $expectedResult = [
+            'title' => $remoteTitle,
+            'description' => $remoteDesc,
+            'tags' => $remoteTags,
+        ];
+
+        $this->httpAccess
+            ->expects(static::once())
+            ->method('getCurlHeaderCallback')
+            ->willReturnCallback(
+                function (&$charset) use (
+                    $remoteCharset
+                ): callable {
+                    return function () use (
+                        &$charset,
+                        $remoteCharset
+                    ): void {
+                        $charset = $remoteCharset;
+                    };
+                }
+            )
+        ;
+        $this->httpAccess
+            ->expects(static::once())
+            ->method('getCurlDownloadCallback')
+            ->willReturnCallback(
+                function (&$charset, &$title, &$description, &$tags) use (
+                    $remoteCharset,
+                    $remoteTitle,
+                    $remoteDesc,
+                    $remoteTags
+                ): callable {
+                    return function () use (
+                        &$charset,
+                        &$title,
+                        &$description,
+                        &$tags,
+                        $remoteCharset,
+                        $remoteTitle,
+                        $remoteDesc,
+                        $remoteTags
+                    ): void {
+                        static::assertSame($remoteCharset, $charset);
+
+                        $title = $remoteTitle;
+                        $description = $remoteDesc;
+                        $tags = $remoteTags;
+                    };
+                }
+            )
+        ;
+        $this->httpAccess
+            ->expects(static::once())
+            ->method('getHttpResponse')
+            ->with($url, 30, 4194304)
+            ->willReturnCallback(function($url, $timeout, $maxBytes, $headerCallback, $dlCallback): void {
+                $headerCallback();
+                $dlCallback();
+            })
+        ;
+
+        $result = $this->retriever->retrieve($url);
+
+        static::assertSame($expectedResult, $result);
+    }
+
+    /**
+     * Test metadata retrieve() without any value
+     */
+    public function testEmptyRetrieval(): void
+    {
+        $url = 'https://domain.tld/link';
+
+        $expectedResult = [
+            'title' => null,
+            'description' => null,
+            'tags' => null,
+        ];
+
+        $this->httpAccess
+            ->expects(static::once())
+            ->method('getCurlDownloadCallback')
+            ->willReturnCallback(
+                function (): callable {
+                    return function (): void {};
+                }
+            )
+        ;
+        $this->httpAccess
+            ->expects(static::once())
+            ->method('getCurlHeaderCallback')
+            ->willReturnCallback(
+                function (): callable {
+                    return function (): void {};
+                }
+            )
+        ;
+        $this->httpAccess
+            ->expects(static::once())
+            ->method('getHttpResponse')
+            ->with($url, 30, 4194304)
+            ->willReturnCallback(function($url, $timeout, $maxBytes, $headerCallback, $dlCallback): void {
+                $headerCallback();
+                $dlCallback();
+            })
+        ;
+
+        $result = $this->retriever->retrieve($url);
+
+        static::assertSame($expectedResult, $result);
+    }
+}
diff --git a/tests/legacy/LegacyLinkDBTest.php b/tests/legacy/LegacyLinkDBTest.php
index df2cad62..5c3fd425 100644
--- a/tests/legacy/LegacyLinkDBTest.php
+++ b/tests/legacy/LegacyLinkDBTest.php
@@ -296,6 +296,10 @@ class LegacyLinkDBTest extends \Shaarli\TestCase
                 // They need to be grouped with the first case found - order by date DESC: `sTuff`.
                 'sTuff' => 2,
                 'ut' => 1,
+                'assurance' => 1,
+                'coding-style' => 1,
+                'quality' => 1,
+                'standards' => 1,
             ),
             self::$publicLinkDB->linksCountPerTag()
         );
@@ -324,6 +328,10 @@ class LegacyLinkDBTest extends \Shaarli\TestCase
                 'tag3' => 1,
                 'tag4' => 1,
                 'ut' => 1,
+                'assurance' => 1,
+                'coding-style' => 1,
+                'quality' => 1,
+                'standards' => 1,
             ),
             self::$privateLinkDB->linksCountPerTag()
         );
@@ -544,6 +552,10 @@ class LegacyLinkDBTest extends \Shaarli\TestCase
             'tag4' => 1,
             'ut' => 1,
             'w3c' => 1,
+            'assurance' => 1,
+            'coding-style' => 1,
+            'quality' => 1,
+            'standards' => 1,
         ];
         $tags = self::$privateLinkDB->linksCountPerTag();
 
diff --git a/tests/legacy/LegacyUpdaterTest.php b/tests/legacy/LegacyUpdaterTest.php
index f7391b86..395dd4b7 100644
--- a/tests/legacy/LegacyUpdaterTest.php
+++ b/tests/legacy/LegacyUpdaterTest.php
@@ -51,10 +51,10 @@ class LegacyUpdaterTest extends \Shaarli\TestCase
      */
     public function testReadEmptyUpdatesFile()
     {
-        $this->assertEquals(array(), UpdaterUtils::read_updates_file(''));
+        $this->assertEquals(array(), UpdaterUtils::readUpdatesFile(''));
         $updatesFile = $this->conf->get('resource.data_dir') . '/updates.txt';
         touch($updatesFile);
-        $this->assertEquals(array(), UpdaterUtils::read_updates_file($updatesFile));
+        $this->assertEquals(array(), UpdaterUtils::readUpdatesFile($updatesFile));
         unlink($updatesFile);
     }
 
@@ -66,14 +66,14 @@ class LegacyUpdaterTest extends \Shaarli\TestCase
         $updatesFile = $this->conf->get('resource.data_dir') . '/updates.txt';
         $updatesMethods = array('m1', 'm2', 'm3');
 
-        UpdaterUtils::write_updates_file($updatesFile, $updatesMethods);
-        $readMethods = UpdaterUtils::read_updates_file($updatesFile);
+        UpdaterUtils::writeUpdatesFile($updatesFile, $updatesMethods);
+        $readMethods = UpdaterUtils::readUpdatesFile($updatesFile);
         $this->assertEquals($readMethods, $updatesMethods);
 
         // Update
         $updatesMethods[] = 'm4';
-        UpdaterUtils::write_updates_file($updatesFile, $updatesMethods);
-        $readMethods = UpdaterUtils::read_updates_file($updatesFile);
+        UpdaterUtils::writeUpdatesFile($updatesFile, $updatesMethods);
+        $readMethods = UpdaterUtils::readUpdatesFile($updatesFile);
         $this->assertEquals($readMethods, $updatesMethods);
         unlink($updatesFile);
     }
@@ -86,7 +86,7 @@ class LegacyUpdaterTest extends \Shaarli\TestCase
         $this->expectException(\Exception::class);
         $this->expectExceptionMessageRegExp('/Updates file path is not set(.*)/');
 
-        UpdaterUtils::write_updates_file('', array('test'));
+        UpdaterUtils::writeUpdatesFile('', array('test'));
     }
 
     /**
@@ -101,7 +101,7 @@ class LegacyUpdaterTest extends \Shaarli\TestCase
         touch($updatesFile);
         chmod($updatesFile, 0444);
         try {
-            @UpdaterUtils::write_updates_file($updatesFile, array('test'));
+            @UpdaterUtils::writeUpdatesFile($updatesFile, array('test'));
         } catch (Exception $e) {
             unlink($updatesFile);
             throw $e;
diff --git a/tests/netscape/BookmarkExportTest.php b/tests/netscape/BookmarkExportTest.php
index 9b95ccc9..ad288f78 100644
--- a/tests/netscape/BookmarkExportTest.php
+++ b/tests/netscape/BookmarkExportTest.php
@@ -2,6 +2,7 @@
 
 namespace Shaarli\Netscape;
 
+use malkusch\lock\mutex\NoMutex;
 use Shaarli\Bookmark\BookmarkFileService;
 use Shaarli\Config\ConfigManager;
 use Shaarli\Formatter\BookmarkFormatter;
@@ -56,12 +57,13 @@ class BookmarkExportTest extends TestCase
      */
     public static function setUpBeforeClass(): void
     {
+        $mutex = new NoMutex();
         static::$conf = new ConfigManager('tests/utils/config/configJson');
         static::$conf->set('resource.datastore', static::$testDatastore);
         static::$refDb = new \ReferenceLinkDB();
         static::$refDb->write(static::$testDatastore);
         static::$history = new History('sandbox/history.php');
-        static::$bookmarkService = new BookmarkFileService(static::$conf, static::$history, true);
+        static::$bookmarkService = new BookmarkFileService(static::$conf, static::$history, $mutex, true);
         $factory = new FormatterFactory(static::$conf, true);
         static::$formatter = $factory->getFormatter('raw');
     }
diff --git a/tests/netscape/BookmarkImportTest.php b/tests/netscape/BookmarkImportTest.php
index c1e49b5f..6856ebca 100644
--- a/tests/netscape/BookmarkImportTest.php
+++ b/tests/netscape/BookmarkImportTest.php
@@ -3,6 +3,7 @@
 namespace Shaarli\Netscape;
 
 use DateTime;
+use malkusch\lock\mutex\NoMutex;
 use Psr\Http\Message\UploadedFileInterface;
 use Shaarli\Bookmark\Bookmark;
 use Shaarli\Bookmark\BookmarkFileService;
@@ -87,6 +88,7 @@ class BookmarkImportTest extends TestCase
      */
     protected function setUp(): void
     {
+        $mutex = new NoMutex();
         if (file_exists(self::$testDatastore)) {
             unlink(self::$testDatastore);
         }
@@ -97,7 +99,7 @@ class BookmarkImportTest extends TestCase
         $this->conf->set('resource.page_cache', $this->pagecache);
         $this->conf->set('resource.datastore', self::$testDatastore);
         $this->history = new History(self::$historyFilePath);
-        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, true);
+        $this->bookmarkService = new BookmarkFileService($this->conf, $this->history, $mutex, true);
         $this->netscapeBookmarkUtils = new NetscapeBookmarkUtils($this->bookmarkService, $this->conf, $this->history);
     }
 
@@ -529,7 +531,7 @@ class BookmarkImportTest extends TestCase
     {
         $post = array(
             'privacy' => 'public',
-            'default_tags' => 'tag1,tag2 tag3'
+            'default_tags' => 'tag1 tag2 tag3'
         );
         $files = file2array('netscape_basic.htm');
         $this->assertStringMatchesFormat(
@@ -550,7 +552,7 @@ class BookmarkImportTest extends TestCase
     {
         $post = array(
             'privacy' => 'public',
-            'default_tags' => 'tag1&,tag2 "tag3"'
+            'default_tags' => 'tag1& tag2 "tag3"'
         );
         $files = file2array('netscape_basic.htm');
         $this->assertStringMatchesFormat(
@@ -571,6 +573,43 @@ class BookmarkImportTest extends TestCase
     }
 
     /**
+     * Add user-specified tags to all imported bookmarks
+     */
+    public function testSetDefaultTagsWithCustomSeparator()
+    {
+        $separator = '@';
+        $this->conf->set('general.tags_separator', $separator);
+        $post = [
+            'privacy' => 'public',
+            'default_tags' => 'tag1@tag2@tag3@multiple words tag'
+        ];
+        $files = file2array('netscape_basic.htm');
+        $this->assertStringMatchesFormat(
+            'File netscape_basic.htm (482 bytes) was successfully processed in %d seconds:'
+            .' 2 bookmarks imported, 0 bookmarks overwritten, 0 bookmarks skipped.',
+            $this->netscapeBookmarkUtils->import($post, $files)
+        );
+        $this->assertEquals(2, $this->bookmarkService->count());
+        $this->assertEquals(0, $this->bookmarkService->count(BookmarkFilter::$PRIVATE));
+        $this->assertEquals(
+            'tag1@tag2@tag3@multiple words tag@private@secret',
+            $this->bookmarkService->get(0)->getTagsString($separator)
+        );
+        $this->assertEquals(
+            ['tag1', 'tag2', 'tag3', 'multiple words tag', 'private', 'secret'],
+            $this->bookmarkService->get(0)->getTags()
+        );
+        $this->assertEquals(
+            'tag1@tag2@tag3@multiple words tag@public@hello@world',
+            $this->bookmarkService->get(1)->getTagsString($separator)
+        );
+        $this->assertEquals(
+            ['tag1', 'tag2', 'tag3', 'multiple words tag', 'public', 'hello', 'world'],
+            $this->bookmarkService->get(1)->getTags()
+        );
+    }
+
+    /**
      * Ensure each imported bookmark has a unique id
      *
      * See https://github.com/shaarli/Shaarli/issues/351
diff --git a/tests/plugins/PluginWallabagTest.php b/tests/plugins/PluginWallabagTest.php
index 36317215..9a402fb7 100644
--- a/tests/plugins/PluginWallabagTest.php
+++ b/tests/plugins/PluginWallabagTest.php
@@ -49,14 +49,15 @@ class PluginWallabagTest extends \Shaarli\TestCase
         $conf = new ConfigManager('');
         $conf->set('plugins.WALLABAG_URL', 'value');
         $str = 'http://randomstr.com/test';
-        $data = array(
+        $data = [
             'title' => $str,
-            'links' => array(
-                array(
+            'links' => [
+                [
                     'url' => $str,
-                )
-            )
-        );
+                ]
+            ],
+            '_LOGGEDIN_' => true,
+        ];
 
         $data = hook_wallabag_render_linklist($data, $conf);
         $link = $data['links'][0];
@@ -69,4 +70,26 @@ class PluginWallabagTest extends \Shaarli\TestCase
         $this->assertNotFalse(strpos($link['link_plugin'][0], urlencode($str)));
         $this->assertNotFalse(strpos($link['link_plugin'][0], $conf->get('plugins.WALLABAG_URL')));
     }
+
+    /**
+     * Test render_linklist hook while logged out: no change.
+     */
+    public function testWallabagLinklistLoggedOut(): void
+    {
+        $conf = new ConfigManager('');
+        $str = 'http://randomstr.com/test';
+        $data = [
+            'title' => $str,
+            'links' => [
+                [
+                    'url' => $str,
+                ]
+            ],
+            '_LOGGEDIN_' => false,
+        ];
+
+        $result = hook_wallabag_render_linklist($data, $conf);
+
+        static::assertSame($data, $result);
+    }
 }
diff --git a/tests/security/BanManagerTest.php b/tests/security/BanManagerTest.php
index 698d3d10..29d2791b 100644
--- a/tests/security/BanManagerTest.php
+++ b/tests/security/BanManagerTest.php
@@ -3,7 +3,8 @@
 
 namespace Shaarli\Security;
 
-use Shaarli\FileUtils;
+use Psr\Log\LoggerInterface;
+use Shaarli\Helper\FileUtils;
 use Shaarli\TestCase;
 
 /**
@@ -387,7 +388,7 @@ class BanManagerTest extends TestCase
             3,
             1800,
             $this->banFile,
-            $this->logFile
+            $this->createMock(LoggerInterface::class)
         );
     }
 }
diff --git a/tests/security/LoginManagerTest.php b/tests/security/LoginManagerTest.php
index d302983d..f7609fc6 100644
--- a/tests/security/LoginManagerTest.php
+++ b/tests/security/LoginManagerTest.php
@@ -2,6 +2,8 @@
 
 namespace Shaarli\Security;
 
+use Psr\Log\LoggerInterface;
+use Shaarli\FakeConfigManager;
 use Shaarli\TestCase;
 
 /**
@@ -9,7 +11,7 @@ use Shaarli\TestCase;
  */
 class LoginManagerTest extends TestCase
 {
-    /** @var \FakeConfigManager Configuration Manager instance */
+    /** @var FakeConfigManager Configuration Manager instance */
     protected $configManager = null;
 
     /** @var LoginManager Login Manager instance */
@@ -60,6 +62,9 @@ class LoginManagerTest extends TestCase
     /** @var CookieManager */
     protected $cookieManager;
 
+    /** @var BanManager */
+    protected $banManager;
+
     /**
      * Prepare or reset test resources
      */
@@ -71,7 +76,7 @@ class LoginManagerTest extends TestCase
 
         $this->passwordHash = sha1($this->password . $this->login . $this->salt);
 
-        $this->configManager = new \FakeConfigManager([
+        $this->configManager = new FakeConfigManager([
             'credentials.login' => $this->login,
             'credentials.hash' => $this->passwordHash,
             'credentials.salt' => $this->salt,
@@ -91,18 +96,29 @@ class LoginManagerTest extends TestCase
             return $this->cookie[$key] ?? null;
         });
         $this->sessionManager = new SessionManager($this->session, $this->configManager, 'session_path');
-        $this->loginManager = new LoginManager($this->configManager, $this->sessionManager, $this->cookieManager);
+        $this->banManager = $this->createMock(BanManager::class);
+        $this->loginManager = new LoginManager(
+            $this->configManager,
+            $this->sessionManager,
+            $this->cookieManager,
+            $this->banManager,
+            $this->createMock(LoggerInterface::class)
+        );
         $this->server['REMOTE_ADDR'] = $this->ipAddr;
     }
 
     /**
      * Record a failed login attempt
      */
-    public function testHandleFailedLogin()
+    public function testHandleFailedLogin(): void
     {
+        $this->banManager->expects(static::exactly(2))->method('handleFailedAttempt');
+        $this->banManager->method('isBanned')->willReturn(true);
+
         $this->loginManager->handleFailedLogin($this->server);
         $this->loginManager->handleFailedLogin($this->server);
-        $this->assertFalse($this->loginManager->canLogin($this->server));
+
+        static::assertFalse($this->loginManager->canLogin($this->server));
     }
 
     /**
@@ -114,8 +130,13 @@ class LoginManagerTest extends TestCase
             'REMOTE_ADDR' => $this->trustedProxy,
             'HTTP_X_FORWARDED_FOR' => $this->ipAddr,
         ];
+
+        $this->banManager->expects(static::exactly(2))->method('handleFailedAttempt');
+        $this->banManager->method('isBanned')->willReturn(true);
+
         $this->loginManager->handleFailedLogin($server);
         $this->loginManager->handleFailedLogin($server);
+
         $this->assertFalse($this->loginManager->canLogin($server));
     }
 
@@ -196,10 +217,16 @@ class LoginManagerTest extends TestCase
      */
     public function testCheckLoginStateNotConfigured()
     {
-        $configManager = new \FakeConfigManager([
+        $configManager = new FakeConfigManager([
             'resource.ban_file' => $this->banFile,
         ]);
-        $loginManager = new LoginManager($configManager, null, $this->cookieManager);
+        $loginManager = new LoginManager(
+            $configManager,
+            $this->sessionManager,
+            $this->cookieManager,
+            $this->banManager,
+            $this->createMock(LoggerInterface::class)
+        );
         $loginManager->checkLoginState('');
 
         $this->assertFalse($loginManager->isLoggedIn());
@@ -270,7 +297,7 @@ class LoginManagerTest extends TestCase
     public function testCheckCredentialsWrongLogin()
     {
         $this->assertFalse(
-            $this->loginManager->checkCredentials('', '', 'b4dl0g1n', $this->password)
+            $this->loginManager->checkCredentials('', 'b4dl0g1n', $this->password)
         );
     }
 
@@ -280,7 +307,7 @@ class LoginManagerTest extends TestCase
     public function testCheckCredentialsWrongPassword()
     {
         $this->assertFalse(
-            $this->loginManager->checkCredentials('', '', $this->login, 'b4dp455wd')
+            $this->loginManager->checkCredentials('', $this->login, 'b4dp455wd')
         );
     }
 
@@ -290,7 +317,7 @@ class LoginManagerTest extends TestCase
     public function testCheckCredentialsWrongLoginAndPassword()
     {
         $this->assertFalse(
-            $this->loginManager->checkCredentials('', '', 'b4dl0g1n', 'b4dp455wd')
+            $this->loginManager->checkCredentials('', 'b4dl0g1n', 'b4dp455wd')
         );
     }
 
@@ -300,7 +327,7 @@ class LoginManagerTest extends TestCase
     public function testCheckCredentialsGoodLoginAndPassword()
     {
         $this->assertTrue(
-            $this->loginManager->checkCredentials('', '', $this->login, $this->password)
+            $this->loginManager->checkCredentials('', $this->login, $this->password)
         );
     }
 
@@ -311,7 +338,7 @@ class LoginManagerTest extends TestCase
     {
         $this->configManager->set('ldap.host', 'dummy');
         $this->assertFalse(
-            $this->loginManager->checkCredentials('', '', $this->login, $this->password)
+            $this->loginManager->checkCredentials('', $this->login, $this->password)
         );
     }
 
diff --git a/tests/security/SessionManagerTest.php b/tests/security/SessionManagerTest.php
index 3f9c3ef5..6830d714 100644
--- a/tests/security/SessionManagerTest.php
+++ b/tests/security/SessionManagerTest.php
@@ -2,6 +2,7 @@
 
 namespace Shaarli\Security;
 
+use Shaarli\FakeConfigManager;
 use Shaarli\TestCase;
 
 /**
@@ -12,7 +13,7 @@ class SessionManagerTest extends TestCase
     /** @var array Session ID hashes */
     protected static $sidHashes = null;
 
-    /** @var \FakeConfigManager ConfigManager substitute for testing */
+    /** @var FakeConfigManager ConfigManager substitute for testing */
     protected $conf = null;
 
     /** @var array $_SESSION array for testing */
@@ -34,7 +35,7 @@ class SessionManagerTest extends TestCase
      */
     protected function setUp(): void
     {
-        $this->conf = new \FakeConfigManager([
+        $this->conf = new FakeConfigManager([
             'credentials.login' => 'johndoe',
             'credentials.salt' => 'salt',
             'security.session_protection_disabled' => false,
diff --git a/tests/updater/UpdaterTest.php b/tests/updater/UpdaterTest.php
index a6280b8c..cadd8265 100644
--- a/tests/updater/UpdaterTest.php
+++ b/tests/updater/UpdaterTest.php
@@ -2,6 +2,7 @@
 namespace Shaarli\Updater;
 
 use Exception;
+use malkusch\lock\mutex\NoMutex;
 use Shaarli\Bookmark\BookmarkFileService;
 use Shaarli\Bookmark\BookmarkServiceInterface;
 use Shaarli\Config\ConfigManager;
@@ -44,12 +45,13 @@ class UpdaterTest extends TestCase
      */
     protected function setUp(): void
     {
+        $mutex = new NoMutex();
         $this->refDB = new \ReferenceLinkDB();
         $this->refDB->write(self::$testDatastore);
 
         copy('tests/utils/config/configJson.json.php', self::$configFile .'.json.php');
         $this->conf = new ConfigManager(self::$configFile);
-        $this->bookmarkService = new BookmarkFileService($this->conf, $this->createMock(History::class), true);
+        $this->bookmarkService = new BookmarkFileService($this->conf, $this->createMock(History::class), $mutex, true);
         $this->updater = new Updater([], $this->bookmarkService, $this->conf, true);
     }
 
@@ -58,10 +60,10 @@ class UpdaterTest extends TestCase
      */
     public function testReadEmptyUpdatesFile()
     {
-        $this->assertEquals(array(), UpdaterUtils::read_updates_file(''));
+        $this->assertEquals(array(), UpdaterUtils::readUpdatesFile(''));
         $updatesFile = $this->conf->get('resource.data_dir') . '/updates.txt';
         touch($updatesFile);
-        $this->assertEquals(array(), UpdaterUtils::read_updates_file($updatesFile));
+        $this->assertEquals(array(), UpdaterUtils::readUpdatesFile($updatesFile));
         unlink($updatesFile);
     }
 
@@ -73,14 +75,14 @@ class UpdaterTest extends TestCase
         $updatesFile = $this->conf->get('resource.data_dir') . '/updates.txt';
         $updatesMethods = array('m1', 'm2', 'm3');
 
-        UpdaterUtils::write_updates_file($updatesFile, $updatesMethods);
-        $readMethods = UpdaterUtils::read_updates_file($updatesFile);
+        UpdaterUtils::writeUpdatesFile($updatesFile, $updatesMethods);
+        $readMethods = UpdaterUtils::readUpdatesFile($updatesFile);
         $this->assertEquals($readMethods, $updatesMethods);
 
         // Update
         $updatesMethods[] = 'm4';
-        UpdaterUtils::write_updates_file($updatesFile, $updatesMethods);
-        $readMethods = UpdaterUtils::read_updates_file($updatesFile);
+        UpdaterUtils::writeUpdatesFile($updatesFile, $updatesMethods);
+        $readMethods = UpdaterUtils::readUpdatesFile($updatesFile);
         $this->assertEquals($readMethods, $updatesMethods);
         unlink($updatesFile);
     }
@@ -93,7 +95,7 @@ class UpdaterTest extends TestCase
         $this->expectException(\Exception::class);
         $this->expectExceptionMessageRegExp('/Updates file path is not set(.*)/');
 
-        UpdaterUtils::write_updates_file('', array('test'));
+        UpdaterUtils::writeUpdatesFile('', array('test'));
     }
 
     /**
@@ -108,7 +110,7 @@ class UpdaterTest extends TestCase
         touch($updatesFile);
         chmod($updatesFile, 0444);
         try {
-            @UpdaterUtils::write_updates_file($updatesFile, array('test'));
+            @UpdaterUtils::writeUpdatesFile($updatesFile, array('test'));
         } catch (Exception $e) {
             unlink($updatesFile);
             throw $e;
diff --git a/tests/utils/FakeApplicationUtils.php b/tests/utils/FakeApplicationUtils.php
index de83d598..d5289ede 100644
--- a/tests/utils/FakeApplicationUtils.php
+++ b/tests/utils/FakeApplicationUtils.php
@@ -2,6 +2,8 @@
 
 namespace Shaarli;
 
+use Shaarli\Helper\ApplicationUtils;
+
 /**
  * Fake ApplicationUtils class to avoid HTTP requests
  */
diff --git a/tests/utils/FakeConfigManager.php b/tests/utils/FakeConfigManager.php
index 360b34a9..014c2af0 100644
--- a/tests/utils/FakeConfigManager.php
+++ b/tests/utils/FakeConfigManager.php
@@ -1,9 +1,13 @@
 <?php
 
+namespace Shaarli;
+
+use Shaarli\Config\ConfigManager;
+
 /**
  * Fake ConfigManager
  */
-class FakeConfigManager
+class FakeConfigManager extends ConfigManager
 {
     protected $values = [];
 
@@ -23,7 +27,7 @@ class FakeConfigManager
      * @param string $key   Key of the value to set
      * @param mixed  $value Value to set
      */
-    public function set($key, $value)
+    public function set($key, $value, $write = false, $isLoggedIn = false)
     {
         $this->values[$key] = $value;
     }
@@ -35,7 +39,7 @@ class FakeConfigManager
      *
      * @return mixed The value if set, else the name of the key
      */
-    public function get($key)
+    public function get($key, $default = '')
     {
         if (isset($this->values[$key])) {
             return $this->values[$key];
diff --git a/tests/utils/ReferenceHistory.php b/tests/utils/ReferenceHistory.php
index 516c9f51..aed5d2cf 100644
--- a/tests/utils/ReferenceHistory.php
+++ b/tests/utils/ReferenceHistory.php
@@ -1,6 +1,6 @@
 <?php
 
-use Shaarli\FileUtils;
+use Shaarli\Helper\FileUtils;
 use Shaarli\History;
 
 /**
diff --git a/tests/utils/ReferenceLinkDB.php b/tests/utils/ReferenceLinkDB.php
index fc3cb109..1f53dc3c 100644
--- a/tests/utils/ReferenceLinkDB.php
+++ b/tests/utils/ReferenceLinkDB.php
@@ -82,7 +82,7 @@ class ReferenceLinkDB
             'This guide extends and expands on PSR-1, the basic coding standard.',
             0,
             DateTime::createFromFormat(Bookmark::LINK_DATE_FORMAT, '20121206_152312'),
-            ''
+            'coding-style standards quality assurance'
         );
 
         $this->addLink(