LayoutTests/media/video-dom-src.html

<video controls></video>
<script src=media-file.js></script>
<script src=video-test.js></script>
<script>
    testExpected("video.currentSrc", "");
    var mediaFile = findMediaFile("video", "content/test");
    video.src = mediaFile;
    testExpected("video.currentSrc", "");

    waitForEvent('canplaythrough', function () { 
        testExpected("stripExtension(relativeURL(video.currentSrc))", stripExtension(mediaFile));
        endTest();
    } );
    
    video.load();
</script>