mediasource-redundant-seek.html

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This test has a WPT meta file that disables it given conditions:
- : https://bugzilla.mozilla.org/show_bug.cgi?id=1154881
This WPT test may be referenced by the following Test IDs:
- /media-source/mediasource-redundant-seek.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<!-- Copyright © 2016 Chromium authors and World Wide Web Consortium, (Massachusetts Institute of Technology, ERCIM, Keio University, Beihang). -->

<html>

    <head>

        <title>Test MediaSource behavior when receiving multiple seek requests during a pending seek.</title>

        <meta name="timeout" content="long">

        <script src="/resources/testharness.js"></script>

        <script src="/resources/testharnessreport.js"></script>

        <script src="mediasource-util.js"></script>

    </head>

    <body>

        <div id="log"></div>

        <script>

            mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)

                mediaElement.play();

                // Append all media data for complete playback.

                test.expectEvent(sourceBuffer, 'updateend', 'sourceBuffer end update.');

                test.expectEvent(mediaElement, 'loadedmetadata', 'Reached HAVE_METADATA');

                test.expectEvent(mediaElement, 'playing', 'Playing media.');

                sourceBuffer.appendBuffer(mediaData);

                test.waitForExpectedEvents(function()

                    var bufferedRanges = mediaElement.buffered;

                    assert_greater_than_equal(mediaElement.duration, 4.0, 'Duration is >= 4.0s');

                    assert_equals(bufferedRanges.length, 1, 'Just one buffered range');

                    assert_less_than_equal(bufferedRanges.start(0), 1.0, 'Buffered range starts <= 1.0s');

                    assert_greater_than_equal(bufferedRanges.end(0), 4.0, 'Buffered range ends >= 4.0s');

                    test.expectEvent(mediaElement, 'seeking', 'seeking');

                    test.expectEvent(mediaElement, 'timeupdate', 'timeupdate');

                    test.expectEvent(mediaElement, 'seeked', 'seeked');

                    // Request seeks.

                    mediaElement.currentTime = 1.0;

                    // This 'ephemeral' seek should be invisible to javascript, except any latency incurred in its processing.

                    mediaElement.currentTime = 3.0;

                    mediaElement.currentTime = 1.0;

                    assert_true(mediaElement.seeking, 'Element is seeking');

                    assert_equals(mediaElement.currentTime, 1.0, 'Element time is at last seek time');

});

                test.waitForExpectedEvents(function()

                    // No more seeking or seeked events should occur.

                    mediaElement.addEventListener('seeking', test.unreached_func("Unexpected event 'seeking'"));

                    mediaElement.addEventListener('seeked', test.unreached_func("Unexpected event 'seeked'"));

                    assert_false(mediaElement.seeking, 'Element is not seeking');

                    assert_greater_than_equal(mediaElement.currentTime, 1.0, 'Element time is at or after last seek time');

                    assert_less_than(mediaElement.currentTime, 3.0, 'Element time is before the ephemeral seek time');

                    var timeBeforeWait = mediaElement.currentTime;

                    test.waitForCurrentTimeChange(mediaElement, function()

                        // Time should have advanced a little, but not yet reached the ephemeral seek time.

                        assert_greater_than(mediaElement.currentTime, timeBeforeWait, 'Element time has increased');

                        assert_less_than(mediaElement.currentTime, 3.0, 'Element time is still before the ephemeral seek time');

                        test.done();

});

});

            }, 'Test redundant fully prebuffered seek');

        </script>

    </body>

</html>