[HttpFoundation][Windows] Fixed guesser tests if Fileinfo extension is not loaded

Didn't test for presence of mime_content_type function since it's obsolete (deprecated) in PHP5

tests/Symfony/Tests/Component/HttpFoundation/File/MimeType/MimeTypeTest.php

@@ -24,31 +24,51 @@ class MimeTypeTest extends \PHPUnit_Framework_TestCase
 
     public function testGuessImageWithoutExtension()
     {
-        $this->assertEquals('image/gif', MimeTypeGuesser::getInstance()->guess(__DIR__.'/../Fixtures/test'));
+        if (extension_loaded('fileinfo')) {
+            $this->assertEquals('image/gif', MimeTypeGuesser::getInstance()->guess(__DIR__.'/../Fixtures/test'));
+        } else {
+            $this->assertNull(MimeTypeGuesser::getInstance()->guess(__DIR__.'/../Fixtures/test'));
+        }
     }
 
     public function testGuessImageWithContentTypeMimeTypeGuesser()
     {
         $guesser = MimeTypeGuesser::getInstance();
         $guesser->register(new ContentTypeMimeTypeGuesser());
-        $this->assertEquals('image/gif', $guesser->guess(__DIR__.'/../Fixtures/test'));
+        if (extension_loaded('fileinfo')) {
+            $this->assertEquals('image/gif', MimeTypeGuesser::getInstance()->guess(__DIR__.'/../Fixtures/test'));
+        } else {
+            $this->assertNull(MimeTypeGuesser::getInstance()->guess(__DIR__.'/../Fixtures/test'));
+        }
     }
 
     public function testGuessImageWithFileBinaryMimeTypeGuesser()
     {
         $guesser = MimeTypeGuesser::getInstance();
         $guesser->register(new FileBinaryMimeTypeGuesser());
-        $this->assertEquals('image/gif', $guesser->guess(__DIR__.'/../Fixtures/test'));
+        if (extension_loaded('fileinfo')) {
+            $this->assertEquals('image/gif', MimeTypeGuesser::getInstance()->guess(__DIR__.'/../Fixtures/test'));
+        } else {
+            $this->assertNull(MimeTypeGuesser::getInstance()->guess(__DIR__.'/../Fixtures/test'));
+        }
     }
 
     public function testGuessImageWithKnownExtension()
     {
-        $this->assertEquals('image/gif', MimeTypeGuesser::getInstance()->guess(__DIR__.'/../Fixtures/test.gif'));
+        if (extension_loaded('fileinfo')) {
+            $this->assertEquals('image/gif', MimeTypeGuesser::getInstance()->guess(__DIR__.'/../Fixtures/test.gif'));
+        } else {
+            $this->assertNull(MimeTypeGuesser::getInstance()->guess(__DIR__.'/../Fixtures/test.gif'));
+        }
     }
 
     public function testGuessFileWithUnknownExtension()
     {
-        $this->assertEquals('application/octet-stream', MimeTypeGuesser::getInstance()->guess(__DIR__.'/../Fixtures/.unknownextension'));
+        if (extension_loaded('fileinfo')) {
+            $this->assertEquals('application/octet-stream', MimeTypeGuesser::getInstance()->guess(__DIR__.'/../Fixtures/.unknownextension'));
+        } else {
+            $this->assertNull(MimeTypeGuesser::getInstance()->guess(__DIR__.'/../Fixtures/.unknownextension'));
+        }
     }
 
     public function testGuessWithIncorrectPath()

tests/Symfony/Tests/Component/HttpFoundation/File/UploadedFileTest.php

@@ -33,7 +33,11 @@ class UploadedFileTest extends \PHPUnit_Framework_TestCase
         );
 
         $this->assertAttributeEquals('application/octet-stream', 'mimeType', $file);
-        $this->assertEquals('image/gif', $file->getMimeType());
+        if (extension_loaded('fileinfo')) {
+            $this->assertEquals('image/gif', $file->getMimeType());
+        } else {
+            $this->assertEquals('application/octet-stream', $file->getMimeType());
+        }
     }
 
     public function testFileUploadsWithUnknownMimeType()