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

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Test Info: Warnings

<!doctype html>
<html>
<head>
<title>MediaRecorder Stop</title>
<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">
<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;
}
// This function is used to check that elements of |actual| is a sub
// sequence in the |expected| sequence.
function assertSequenceIn(actual, expected) {
let i = 0;
for (event of actual) {
const j = expected.slice(i).indexOf(event);
assert_greater_than_equal(
j, 0, "Sequence element " + event + " is not included in " +
expected.slice(i));
// Ensure duplicates in actual aren't silently accepted by skipping
// past the matched element.
i = j + 1;
}
return true;
}
function doneWithUnsupportedType(mimeType) {
if (mimeType) {
assert_implements_optional(MediaRecorder.isTypeSupported(mimeType),
`"${mimeType}" for MediaRecorder is not supported`);
}
}
const params = new URLSearchParams(window.location.search);
const mimeType = params.get('mimeType');
const tag = `mimeType "${mimeType}"`;
promise_test(async t => {
doneWithUnsupportedType(mimeType);
const {stream: video} = createVideoStream(t);
const recorder = new MediaRecorder(video, {mimeType});
const events = recordEvents(recorder,
["start", "stop", "dataavailable", "pause", "resume", "error"]);
assert_equals(video.getVideoTracks().length, 1, "video mediastream starts with one track");
recorder.start();
assert_equals(recorder.state, "recording", "MediaRecorder has been started successfully");
video.getVideoTracks()[0].stop();
assert_equals(recorder.state, "recording", "MediaRecorder state should be recording immediately following last track ending");
const event = await new Promise(r => recorder.onstop = r);
assert_equals(event.type, "stop", "the event type should be stop");
assert_true(event.isTrusted, "isTrusted should be true when the event is created by C++");
assert_equals(recorder.state, "inactive", "MediaRecorder is inactive after stop event");
// As the test is written, it's not guaranteed that
// onstart/ondataavailable is invoked, but it's fine if they are.
// The stop element is guaranteed to be in events when we get here.
assertSequenceIn(events, ["start", "dataavailable", "stop"]);
}, "MediaRecorder will stop recording and fire a stop event when all tracks are ended");
promise_test(async t => {
doneWithUnsupportedType(mimeType);
const {stream: video} = createVideoStream(t);
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");
recorder.stop();
assert_equals(recorder.state, "inactive", "MediaRecorder state should be inactive immediately following stop() call");
const event = await new Promise (r => recorder.onstop = r);
assert_equals(event.type, "stop", "the event type should be stop");
assert_true(event.isTrusted, "isTrusted should be true when the event is created by C++");
assert_equals(recorder.state, "inactive", "MediaRecorder is inactive after stop event");
// As the test is written, it's not guaranteed that
// onstart/ondataavailable is invoked, but it's fine if they are.
// The stop element is guaranteed to be in events when we get here.
assertSequenceIn(events, ["start", "dataavailable", "stop"]);
}, "MediaRecorder will stop recording and fire a stop event when stop() is called");
promise_test(async t => {
doneWithUnsupportedType(mimeType);
const recorder = new MediaRecorder(createVideoStream(t).stream, {mimeType});
recorder.stop();
await Promise.race([
new Promise((_, reject) => recorder.onstop =
_ => reject(new Error("onstop should never have been called"))),
new Promise(r => t.step_timeout(r, 0))]);
}, "MediaRecorder will not fire an exception when stopped after creation");
promise_test(async t => {
doneWithUnsupportedType(mimeType);
const recorder = new MediaRecorder(createVideoStream(t).stream, {mimeType});
recorder.start();
recorder.stop();
const event = await new Promise(r => recorder.onstop = r);
recorder.stop();
await Promise.race([
new Promise((_, reject) => recorder.onstop =
_ => reject(new Error("onstop should never have been called"))),
new Promise(r => t.step_timeout(r, 0))]);
}, "MediaRecorder will not fire an exception when stopped after having just been stopped");
promise_test(async t => {
doneWithUnsupportedType(mimeType);
const {stream} = createVideoStream(t);
const recorder = new MediaRecorder(stream, {mimeType});
recorder.start();
stream.getVideoTracks()[0].stop();
const event = await new Promise(r => recorder.onstop = r);
recorder.stop();
await Promise.race([
new Promise((_, reject) => recorder.onstop =
_ => reject(new Error("onstop should never have been called"))),
new Promise(r => t.step_timeout(r, 0))]);
}, "MediaRecorder will not fire an exception when stopped after having just been spontaneously stopped");
promise_test(async t => {
doneWithUnsupportedType(mimeType);
const {stream} = createAudioVideoStream(t);
const recorder = new MediaRecorder(stream, {mimeType});
const events = [];
const startPromise = new Promise(resolve => recorder.onstart = resolve);
const stopPromise = new Promise(resolve => recorder.onstop = resolve);
startPromise.then(() => events.push("start"));
stopPromise.then(() => events.push("stop"));
recorder.start();
recorder.stop();
await stopPromise;
assert_array_equals(events, ["start", "stop"]);
}, "MediaRecorder will fire start event even if stopped synchronously");
promise_test(async t => {
doneWithUnsupportedType(mimeType);
const {stream} = createAudioVideoStream(t);
const recorder = new MediaRecorder(stream, {mimeType});
const events = [];
const startPromise = new Promise(resolve => recorder.onstart = resolve);
const stopPromise = new Promise(resolve => recorder.onstop = resolve);
const errorPromise = new Promise(resolve => recorder.onerror = resolve);
const dataPromise = new Promise(resolve => recorder.ondataavailable = resolve);
startPromise.then(() => events.push("start"));
stopPromise.then(() => events.push("stop"));
errorPromise.then(() => events.push("error"));
dataPromise.then(() => events.push("data"));
recorder.start();
stream.removeTrack(stream.getAudioTracks()[0]);
await stopPromise;
assert_array_equals(events, ["start", "error", "data", "stop"]);
}, "MediaRecorder will fire start event even if a track is removed synchronously");
promise_test(async t => {
doneWithUnsupportedType(mimeType);
const {stream} = createFlowingAudioVideoStream(t);
const recorder = new MediaRecorder(stream, {mimeType});
const events = recordEvents(recorder,
["start", "stop", "dataavailable", "pause", "resume", "error"]);
const dataPromise = new Promise(r => recorder.ondataavailable = r);
recorder.start(0);
await dataPromise;
recorder.stop();
await new Promise (r => recorder.onstop = r);
assertSequenceIn(events, ["start", "dataavailable", "stop"]);
}, "MediaRecorder will fire only start and stop events in a basic recording flow.");
</script>
</body>
</html>