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diff --git a/testing/web-platform/tests/media-source/mediasource-sourcebuffer-trackdefaults.html b/testing/web-platform/tests/media-source/mediasource-sourcebuffer-trackdefaults.html
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+<!DOCTYPE html>
+<!-- Copyright © 2016 Chromium authors and World Wide Web Consortium, (Massachusetts Institute of Technology, ERCIM, Keio University, Beihang). -->
+<meta charset="utf-8">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="mediasource-util.js"></script>
+<script>
+ function sourceBufferTrackDefaultsTest(callback, description)
+ {
+ mediasource_test(function(test, mediaElement, mediaSource)
+ {
+ var sourceBuffer = mediaSource.addSourceBuffer(MediaSourceUtil.AUDIO_VIDEO_TYPE);
+ assert_array_equals(sourceBuffer.trackDefaults, [], "Empty initial SourceBuffer.trackDefaults");
+ callback(test, mediaElement, mediaSource, sourceBuffer);
+ }, description);
+ };
+
+ sourceBufferTrackDefaultsTest(function(test, mediaElement, mediaSource, sourceBuffer)
+ {
+ var emptyList = new TrackDefaultList([]);
+ assert_not_equals(sourceBuffer.trackDefaults, emptyList, "Initial trackDefaults object differs from new empty list");
+
+ sourceBuffer.trackDefaults = emptyList;
+
+ assert_array_equals(sourceBuffer.trackDefaults, [], "Round-tripped empty trackDefaults");
+ assert_equals(sourceBuffer.trackDefaults, emptyList, "Round-tripped the empty TrackDefaultList object");
+ test.done();
+ }, "Test round-trip of empty SourceBuffer.trackDefaults");
+
+ sourceBufferTrackDefaultsTest(function(test, mediaElement, mediaSource, sourceBuffer)
+ {
+ var trackDefault = new TrackDefault("audio", "en-US", "audio label", ["main"], "1");
+ var trackDefaults = new TrackDefaultList([ trackDefault ]);
+
+ sourceBuffer.trackDefaults = trackDefaults;
+
+ assert_array_equals(sourceBuffer.trackDefaults, trackDefaults, "Round-tripped non-empty trackDefaults");
+ assert_equals(sourceBuffer.trackDefaults.length, 1, "Confirmed non-empty trackDefaults");
+ assert_equals(sourceBuffer.trackDefaults, trackDefaults, "Round-tripped the non-empty TrackDefaultList object");
+ test.done();
+ }, "Test round-trip of non-empty SourceBuffer.trackDefaults");
+
+ sourceBufferTrackDefaultsTest(function(test, mediaElement, mediaSource, sourceBuffer)
+ {
+ mediaSource.removeSourceBuffer(sourceBuffer);
+ assert_throws("InvalidStateError",
+ function() { sourceBuffer.trackDefaults = new TrackDefaultList([]); },
+ "Exception thrown when setting trackDefaults on SourceBuffer that is removed from MediaSource");
+ test.done();
+ }, "Test setting trackDefaults on an already-removed SourceBuffer");
+
+ mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
+ {
+ assert_array_equals(sourceBuffer.trackDefaults, [], "Empty initial SourceBuffer.trackDefaults");
+ test.expectEvent(sourceBuffer, "updateend", "Append ended");
+ sourceBuffer.appendBuffer(mediaData);
+ assert_true(sourceBuffer.updating, "SourceBuffer is updating");
+
+ assert_throws("InvalidStateError",
+ function() { sourceBuffer.trackDefaults = new TrackDefaultList([]); },
+ "Exception thrown when setting trackDefaults on SourceBuffer that is updating");
+
+ test.waitForExpectedEvents(function()
+ {
+ assert_false(sourceBuffer.updating, "SourceBuffer is not updating");
+ sourceBuffer.trackDefaults = new TrackDefaultList([]);
+ test.done();
+ });
+ }, "Test setting trackDefaults on a SourceBuffer that is updating");
+
+ sourceBufferTrackDefaultsTest(function(test, mediaElement, mediaSource, sourceBuffer)
+ {
+ assert_throws(new TypeError(),
+ function() { sourceBuffer.trackDefaults = null; },
+ "null should be disallowed by trackDefaults setter");
+ test.done();
+ }, "Test setting null SourceBuffer.trackDefaults");
+</script>