video-black-bg-in-media-document.html

<!DOCTYPE html>
<title>Test that video media documents have a black background.</title>
<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>
<iframe></iframe>
<script>
async_test(function(t) {
    var iframe = document.querySelector("iframe");
    iframe.onload = t.step_func_done(function() {
        var iframeDocument = iframe.contentDocument;
        var iframeBody = iframeDocument.querySelector("body");

        var iframeBodyStyle = iframeDocument.defaultView.getComputedStyle(iframeBody);
        assert_equals(iframeBodyStyle.backgroundColor, "rgb(0, 0, 0)");
    });

    iframe.src = "content/counting.ogv";
});
</script>

chromium/third_party/blink/web_tests/media/video-black-bg-in-media-document.html