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