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, 38 insertions, 0 deletions

diff --git a/tests/HttpUtils/GetHttpUrlTest.php b/tests/HttpUtils/GetHttpUrlTest.php
new file mode 100644
index 00000000..76092b80
--- /dev/null
+++ b/tests/HttpUtils/GetHttpUrlTest.php
@@ -0,0 +1,38 @@
+<?php
+/**
+ * HttpUtils' tests
+ */
+
+require_once 'application/HttpUtils.php';
+
+/**
+ * Unitary tests for get_http_url()
+ */
+class GetHttpUrlTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * Get an invalid local URL
+     */
+    public function testGetInvalidLocalUrl()
+    {
+        list($headers, $content) = get_http_url('/non/existent', 1);
+        $this->assertEquals('HTTP Error', $headers[0]);
+        $this->assertRegexp(
+            '/failed to open stream: No such file or directory/',
+            $content
+        );
+    }
+
+    /**
+     * Get an invalid remote URL
+     */
+    public function testGetInvalidRemoteUrl()
+    {
+        list($headers, $content) = get_http_url('http://non.existent', 1);
+        $this->assertEquals('HTTP Error', $headers[0]);
+        $this->assertRegexp(
+            '/Name or service not known/',
+            $content
+        );
+    }
+}