LayoutTests/media/video-dom-src.html

<video controls></video>
<script src=video-test.js></script>
<script>
    testExpected("video.currentSrc", "");
    video.src = "content/test.mp4";
    testExpected("video.currentSrc", "");

    waitForEvent('load', function () { 
        testExpected("relativeURL(video.currentSrc)", "content/test.mp4");
        endTest();
    } );
    
    video.load();
</script>