Add metadata to audio files | completed tests

tests/Unit/Filters/Audio/AudioMetadataTest.php

@@ -25,6 +25,24 @@ class AudioMetadataTest extends TestCase
         $this->assertEquals(array(0 => "-metadata", 1 => "title=Hello World"), $capturedFilter->apply($audio, $format));
     }
 
+    public function testAddArtwork()
+    {
+        $capturedFilter = null;
+
+        $audio = $this->getAudioMock();
+        $audio->expects($this->once())
+            ->method('addFilter')
+            ->with($this->isInstanceOf('FFMpeg\Filters\Audio\AddMetadataFilter'))
+            ->will($this->returnCallback(function ($filter) use (&$capturedFilter) {
+                $capturedFilter = $filter;
+            }));
+        $format = $this->getMock('FFMpeg\Format\AudioInterface');
+
+        $filters = new AudioFilters($audio);
+        $filters->addMetadata(array('genre' => 'Some Genre', 'artwork' => "/path/to/file.jpg"));
+        $this->assertEquals(array(0 => "-i", 1 => "/path/to/file.jpg", 2 => "-map", 3 => "0", 4 => "-map", 5 => "1", 6 => "-metadata", 7 => "genre=Some Genre"), $capturedFilter->apply($audio, $format));
+    }
+
     public function testRemoveMetadata()
     {
         $capturedFilter = null;