42 lines
1.5 KiB
HTML
42 lines
1.5 KiB
HTML
<!doctype html>
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<title>MediaStreamTrackEvent constructor</title>
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<link rel="help" href="https://w3c.github.io/mediacapture-main/#mediastreamtrackevent">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script>
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test(function() {
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assert_equals(MediaStreamTrackEvent.length, 2);
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assert_throws_js(TypeError, function() {
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new MediaStreamTrackEvent("type");
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});
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assert_throws_js(TypeError, function() {
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new MediaStreamTrackEvent("type", null);
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});
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assert_throws_js(TypeError, function() {
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new MediaStreamTrackEvent("type", undefined);
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});
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}, "The eventInitDict argument is required");
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test(function() {
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assert_throws_js(TypeError, function() {
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new MediaStreamTrackEvent("type", {});
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});
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assert_throws_js(TypeError, function() {
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new MediaStreamTrackEvent("type", { track: null });
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});
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assert_throws_js(TypeError, function() {
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new MediaStreamTrackEvent("type", { track: undefined });
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});
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}, "The eventInitDict's track member is required.");
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test(function() {
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// a MediaStreamTrack instance is needed to test, any instance will do.
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var context = new AudioContext();
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var dest = context.createMediaStreamDestination();
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var track = dest.stream.getTracks()[0];
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assert_true(track instanceof MediaStreamTrack);
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var event = new MediaStreamTrackEvent("type", { track: track });
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assert_equals(event.type, "type");
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assert_equals(event.track, track);
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}, "The MediaStreamTrackEvent instance's track attribute is set.");
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</script>
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