HTTP: move server URL functions to `HttpUtils.php`

Relates to #333

Modifications:
 - refactor server URL utility functions
 - do not access global `$_SERVER` variables
 - add test coverage
 - improve readability
 - apply coding conventions

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

1 files changed, 76 insertions, 0 deletions

diff --git a/tests/HttpUtils/PageUrlTest.php b/tests/HttpUtils/PageUrlTest.php
new file mode 100644
index 00000000..4dbbe9cf
--- /dev/null
+++ b/tests/HttpUtils/PageUrlTest.php
@@ -0,0 +1,76 @@
+<?php
+/**
+ * HttpUtils' tests
+ */
+
+require_once 'application/HttpUtils.php';
+
+/**
+ * Unitary tests for page_url()
+ */
+class PageUrlTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * If on the main page, remove "index.php" from the URL resource
+     */
+    public function testRemoveIndex()
+    {
+        $this->assertEquals(
+            'http://host.tld/?p1=v1&p2=v2',
+            page_url(
+                array(
+                    'HTTPS' => 'Off',
+                    'SERVER_NAME' => 'host.tld',
+                    'SERVER_PORT' => '80',
+                    'SCRIPT_NAME' => '/index.php',
+                    'QUERY_STRING' => 'p1=v1&p2=v2'
+                )
+            )
+        );
+
+        $this->assertEquals(
+            'http://host.tld/admin/?action=edit_tag',
+            page_url(
+                array(
+                    'HTTPS' => 'Off',
+                    'SERVER_NAME' => 'host.tld',
+                    'SERVER_PORT' => '80',
+                    'SCRIPT_NAME' => '/admin/index.php',
+                    'QUERY_STRING' => 'action=edit_tag'
+                )
+            )
+        );
+    }
+
+    /**
+     * The resource is != "index.php"
+     */
+    public function testOtherResource()
+    {
+        $this->assertEquals(
+            'http://host.tld/page.php?p1=v1&p2=v2',
+            page_url(
+                array(
+                    'HTTPS' => 'Off',
+                    'SERVER_NAME' => 'host.tld',
+                    'SERVER_PORT' => '80',
+                    'SCRIPT_NAME' => '/page.php',
+                    'QUERY_STRING' => 'p1=v1&p2=v2'
+                )
+            )
+        );
+
+        $this->assertEquals(
+            'http://host.tld/admin/page.php?action=edit_tag',
+            page_url(
+                array(
+                    'HTTPS' => 'Off',
+                    'SERVER_NAME' => 'host.tld',
+                    'SERVER_PORT' => '80',
+                    'SCRIPT_NAME' => '/admin/page.php',
+                    'QUERY_STRING' => 'action=edit_tag'
+                )
+            )
+        );
+    }
+}