video-preload-first-frame-presented.html

<!DOCTYPE html>
<title>Test that an "auto" preload of a media element will present at least one frame.</title>
<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>
<video preload="auto"></video>
<script>
async_test(function(t) {
    var video = document.querySelector("video");
    video.requestVideoFrameCallback(t.step_func_done(function() {
        var quality = video.getVideoPlaybackQuality();
        assert_greater_than_equal(quality.totalVideoFrames, 1, "totalVideoFrames >= 1");
    }));
    video.src = "content/test.ogv";
});
</script>

chromium/third_party/blink/web_tests/media/video-preload-first-frame-presented.html