mozilla-central/testing/web-platform/tests/mediacapture-record/MediaRecorder-pause-resume.html

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<!doctype html>
<html>
<head>
<title>MediaRecorder Pause and Resume</title>
<meta name=timeout content=long>
<meta name=variant content="?mimeType=''">
<meta name=variant content="?mimeType=video/webm;codecs=vp8,opus">
<meta name=variant content="?mimeType=video/webm;codecs=vp9,opus">
<meta name=variant content="?mimeType=video/webm;codecs=av1,opus">
<meta name=variant content="?mimeType=video/mp4;codecs=avc1,mp4a.40.2">
<meta name=variant content="?mimeType=video/mp4;codecs=avc1,opus">
<meta name=variant content="?mimeType=video/mp4;codecs=vp9,opus">
<meta name=variant content="?mimeType=video/mp4;codecs=vp9,mp4a.40.2">
<meta name=variant content="?mimeType=video/mp4;codecs=av01,opus">
<meta name=variant content="?mimeType=video/mp4;codecs=av01,mp4a.40.2">
<meta name=variant content="?mimeType=video/mp4;codecs=hvc1,opus">
<meta name=variant content="?mimeType=video/mp4;codecs=hvc1,mp4a.40.2">
<meta name=variant content="?mimeType=video/x-matroska;codecs=hvc1,opus">
<meta name=variant content="?mimeType=video/mp4">
<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;
}
const params = new URLSearchParams(window.location.search);
const mimeType = params.get('mimeType');
const tag = `mimeType "${mimeType}"`;
promise_test(async t => {
const { stream: video } = createFlowingVideoStream(t);
if (mimeType && !MediaRecorder.isTypeSupported(mimeType)) {
promise_test(async t => {
assert_throws_dom('NotSupportedError',
() => new MediaRecorder(video, { mimeType }));
}, `MediaRecorder constructor throws on no support 1st, ${mimeType}`);
return;
}
const recorder = new MediaRecorder(video, {mimeType});
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() state and events, ${tag}`);
promise_test(async t => {
const { stream: video } = createFlowingVideoStream(t);
if (mimeType && !MediaRecorder.isTypeSupported(mimeType)) {
promise_test(async t => {
assert_throws_dom('NotSupportedError',
() => new MediaRecorder(video, { mimeType }));
}, `MediaRecorder constructor throws on no support 2nd, ${mimeType}`);
return;
}
const recorder = new MediaRecorder(video, {mimeType});
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, ${tag}`);
</script>
</body>
</html>