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<!doctype html>
<html>
<head>
<title>MediaRecorder Error</title>
<link rel="help" href="https://w3c.github.io/mediacapture-record/MediaRecorder.html#mediarecorder">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<canvas id="canvas" width="320" height="320">
</canvas>
<script>
function createAudioStream() {
let ac = new AudioContext();
let osc = ac.createOscillator();
let dest = ac.createMediaStreamDestination();
osc.connect(dest);
return dest.stream;
}
function createVideoStream() {
let canvas = document.getElementById("canvas");
canvas.getContext('2d').lineTo(10, 10);
return canvas.captureStream();
}
function drawSomethingOnCanvas() {
let canvas = document.getElementById("canvas");
// Drawing something on the canvas generates a frame in its captured stream.
let context = canvas.getContext("2d");
context.fillStyle = "red";
context.fillRect(0, 0, 10, 10);
}
async_test(t => {
let video = createVideoStream();
let audio = createAudioStream();
let recorder = new MediaRecorder(video);
recorder.onerror = t.step_func(mediaRecorderErrorEvent => {
assert_true(mediaRecorderErrorEvent instanceof MediaRecorderErrorEvent, 'the type of event should be MediaRecorderErrorEvent');
assert_equals(mediaRecorderErrorEvent.error.name, 'UnknownError', 'the type of error should be UnknownError when track has been added or removed');
assert_true(mediaRecorderErrorEvent.isTrusted, 'isTrusted should be true when the event is created by C++');
assert_equals(recorder.state, "inactive", "MediaRecorder has been stopped after adding a track to stream");
t.done();
});
recorder.start();
assert_equals(recorder.state, "recording", "MediaRecorder has been started successfully");
video.addTrack(audio.getAudioTracks()[0]);
drawSomethingOnCanvas();
t.step_timeout(() => {
assert_unreached("error event is not fired after 2 seconds");
}, 2000);
}, "MediaRecorder will stop recording when any of track is added and error event will be fired");
async_test(t => {
let video = createVideoStream();
let recorder = new MediaRecorder(video);
recorder.onerror = t.step_func(mediaRecorderErrorEvent => {
assert_true(mediaRecorderErrorEvent instanceof MediaRecorderErrorEvent, 'the type of event should be MediaRecorderErrorEvent');
assert_equals(mediaRecorderErrorEvent.error.name, 'UnknownError', 'the type of error should be UnknownError when track has been added or removed');
assert_true(mediaRecorderErrorEvent.isTrusted, 'isTrusted should be true when the event is created by C++');
assert_equals(recorder.state, "inactive", "MediaRecorder has been stopped after removing a track from stream");
t.done();
});
recorder.start();
assert_equals(recorder.state, "recording", "MediaRecorder has been started successfully");
video.removeTrack(video.getVideoTracks()[0]);
drawSomethingOnCanvas();
t.step_timeout(() => {
assert_unreached("error event is not fired after 2 seconds");
}, 2000);
}, "MediaRecorder will stop recording when any of track is removed and error event will be fired");
test(t => {
let video = createVideoStream();
let recorder = new MediaRecorder(video);
recorder.start();
assert_equals(recorder.state, "recording", "MediaRecorder has been started successfully");
assert_throws("InvalidStateError", function() {
recorder.start();
});
}, "MediaRecorder cannot start recording when MediaRecorder' state is not inactive and an InvalidStateError should be thrown");
</script>
</body>
</html>
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