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<!doctype html>
<html>
<head>
<title>MediaRecorder Pause and Resume</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>
<script src="utils/sources.js"></script>
</head>
<body>
<script>
function recordEvents(target, events) {
let arr = [];
for (let ev of events) {
target.addEventListener(ev, _ => arr.push(ev));
}
return arr;
}
promise_test(async t => {
const {stream: video, control} = createVideoStream(t);
control.addVideoFrame();
const recorder = new MediaRecorder(video);
const events = recordEvents(recorder,
["start", "stop", "dataavailable", "pause", "resume", "error"]);
recorder.start();
assert_equals(recorder.state, "recording", "MediaRecorder has been started successfully");
await new Promise(r => recorder.onstart = r);
recorder.pause();
assert_equals(recorder.state, "paused", "MediaRecorder should be paused immediately following pause()");
// A second call to pause should be idempotent
recorder.pause();
assert_equals(recorder.state, "paused", "MediaRecorder should be paused immediately following pause()");
let event = await new Promise(r => recorder.onpause = r);
assert_equals(event.type, "pause", "the event type should be pause");
assert_true(event.isTrusted, "isTrusted should be true when the event is created by C++");
recorder.resume();
assert_equals(recorder.state, "recording", "MediaRecorder state should be recording immediately following resume() call");
// A second call to resume should be idempotent
recorder.resume();
assert_equals(recorder.state, "recording", "MediaRecorder state should be recording immediately following resume() call");
event = await new Promise(r => recorder.onresume = r);
assert_equals(event.type, "resume", "the event type should be resume");
assert_true(event.isTrusted, "isTrusted should be true when the event is created by C++");
recorder.stop();
await new Promise(r => recorder.onstop = r);
assert_array_equals(events, ["start", "pause", "resume", "dataavailable", "stop"],
"Should have gotten expected events");
}, "MediaRecorder handles pause() and resume() calls appropriately in state and events");
promise_test(async t => {
const {stream: video, control} = createVideoStream(t);
control.addVideoFrame();
const recorder = new MediaRecorder(video);
const events = recordEvents(recorder,
["start", "stop", "dataavailable", "pause", "resume", "error"]);
recorder.start();
assert_equals(recorder.state, "recording", "MediaRecorder has been started successfully");
await new Promise(r => recorder.onstart = r);
recorder.pause();
assert_equals(recorder.state, "paused", "MediaRecorder should be paused immediately following pause()");
let event = await new Promise(r => recorder.onpause = r);
assert_equals(event.type, "pause", "the event type should be pause");
assert_true(event.isTrusted, "isTrusted should be true when the event is created by C++");
recorder.stop();
assert_equals(recorder.state, "inactive", "MediaRecorder should be inactive after being stopped");
await new Promise(r => recorder.onstop = r);
recorder.start();
assert_equals(recorder.state, "recording", "MediaRecorder has been started successfully");
await new Promise(r => recorder.onstart = r);
assert_array_equals(events, ["start", "pause", "dataavailable", "stop", "start"],
"Should have gotten expected events");
}, "MediaRecorder handles stop() in paused state appropriately");
</script>
</body>
</html>
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