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

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This WPT test may be referenced by the following Test IDs:
- /media-source/mediasource-attach-stops-delaying-load-event.html - WPT Dashboard Interop Dashboard

<!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:wolenetz@chromium.org"/>

<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>