mediasource-attach-stops-delaying-load-event.html

<!DOCTYPE html>
<!-- Copyright © 2016 Chromium authors and World Wide Web Consortium, (Massachusetts Institute of Technology, ERCIM, Keio University, Beihang). -->
<title>Tests that MediaSource attachment stops delaying the load event.</title>
<link rel="author" title="Matthew Wolenetz" href="mailto:[email protected]"/>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
async_test(function(test)
{
    var receivedLoadEvent = false;
    var receivedSourceOpenEvent = false;

    window.addEventListener("load", test.step_func(function() {
        assert_false(receivedLoadEvent, "window should not receive multiple load events");
        receivedLoadEvent = true;
        assert_equals(document.readyState, "complete", "document should be complete");
        if (receivedLoadEvent && receivedSourceOpenEvent) {
            test.done();
        }
    }));

    assert_equals(document.readyState, "loading", "document should not be complete yet");
    var video = document.createElement("video");
    var mediaSource = new MediaSource();

    // |video| should stop delaying the load event long and complete the MediaSource attachment
    // before either a "progress", "stalled" or "suspend" event are enqueued.
    video.addEventListener("suspend", test.unreached_func("unexpected 'suspend' event"));
    video.addEventListener("stalled", test.unreached_func("unexpected 'stalled' event"));
    video.addEventListener("progress", test.unreached_func("unexpected 'progress' event"));

    // No error is expected.
    video.addEventListener("error", test.unreached_func("unexpected 'error' event"));

    mediaSource.addEventListener("sourceopen", test.step_func(function() {
        assert_false(receivedSourceOpenEvent, "only one sourceopen event should occur in this test");
        receivedSourceOpenEvent = true;
        assert_equals(video.networkState, video.NETWORK_LOADING);
        assert_equals(video.readyState, video.HAVE_NOTHING);
        if (receivedLoadEvent && receivedSourceOpenEvent) {
            test.done();
        }
    }));

    var mediaSourceURL = URL.createObjectURL(mediaSource);
    video.src = mediaSourceURL;
    test.add_cleanup(function() { URL.revokeObjectURL(mediaSourceURL); });
}, "MediaSource attachment should immediately stop delaying the load event");
</script>
chromium/third_party/blink/web_tests/external/wpt/media-source/mediasource-attach-stops-delaying-load-event.html
