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alastor0325moz-wptsync-bot
alastor0325
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moz-wptsync-bot
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add a WPT to verify the spec src reset behavior.
Differential Revision: https://phabricator.services.mozilla.com/D280511 bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=2016210 gecko-commit: 8ab8241f0554f64020902f1ebafa8bb517822e59 gecko-reviewers: pehrsons
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‎mediacapture-fromelement/src-reset.html‎

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<!DOCTYPE html>
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<html>
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<head>
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<script src=/resources/testharness.js></script>
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<script src=/resources/testharnessreport.js></script>
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<script src=../webrtc/RTCPeerConnection-helper.js></script>
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</head>
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<body>
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<video loop controls></video>
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<script>
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// Verify captureStream tracks are removed when src is reset, and updated when
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// the source is changed directly without an explicit reset. Both src and
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// srcObject attributes are tested. Tests run sequentially on the same video
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// element and stream.
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// https://w3c.github.io/mediacapture-fromelement/#methods
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const VIDEO_ONLY_TEST = {
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filename : "test-v-128k-320x240-24fps-8kfr.webm",
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trackCount : 1
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};
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const AUDIO_ONLY_TEST = {
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filename : "test-a-128k-44100Hz-1ch.webm",
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trackCount : 1
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};
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const AUDIO_VIDEO_TEST = {
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filename : "test-av-384k-44100Hz-1ch-320x240-30fps-10kfr.webm",
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trackCount : 2
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};
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const NO_TRACKS = 0;
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const video = document.querySelector("video");
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assert_implements("captureStream" in video, "HTMLMediaElement.captureStream() is not implemented");
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const stream = video.captureStream();
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// Native streams used as srcObject sources. Kept alive across tests so that
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// their tracks remain active until explicitly replaced, ensuring removetrack
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// fires on the captured stream only when srcObject is changed.
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const nativeStreams = [];
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promise_test(async function testSrcVideoOnly(t) {
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video.onerror = t.unreached_func("video error");
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video.src = "/media/" + VIDEO_ONLY_TEST.filename;
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await video.play();
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assertStreamStatus(VIDEO_ONLY_TEST.trackCount);
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}, "src-video-only");
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promise_test(async function testSrcAudioOnly(t) {
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const prevTrackCount = stream.getTracks().length;
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video.onerror = t.unreached_func("video error");
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video.src = "/media/" + AUDIO_ONLY_TEST.filename;
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await waitForNEvents(stream, "removetrack", prevTrackCount);
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assertStreamStatus(NO_TRACKS);
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await video.play();
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assertStreamStatus(AUDIO_ONLY_TEST.trackCount);
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}, "src-audio-only");
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promise_test(async function testSrcReset(t) {
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const prevTrackCount = stream.getTracks().length;
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video.src = "";
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video.removeAttribute("src");
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await waitForNEvents(stream, "removetrack", prevTrackCount);
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assertStreamStatus(NO_TRACKS);
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}, "src-reset");
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promise_test(async function testSrcObjAudioVideo(t) {
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video.onerror = t.unreached_func("video error");
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const ns = await getNoiseStream({audio: true, video: true});
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nativeStreams.push(ns);
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video.srcObject = ns;
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await video.play();
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assertStreamStatus(AUDIO_VIDEO_TEST.trackCount);
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}, "srcObj-audio-video");
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promise_test(async function testSrcObjVideoOnly(t) {
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const prevTrackCount = stream.getTracks().length;
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video.onerror = t.unreached_func("video error");
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const ns = await getNoiseStream({video: true});
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nativeStreams.push(ns);
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video.srcObject = ns;
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await waitForNEvents(stream, "removetrack", prevTrackCount);
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assertStreamStatus(NO_TRACKS);
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await video.play();
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assertStreamStatus(VIDEO_ONLY_TEST.trackCount);
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}, "srcObj-video-only");
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promise_test(async function testSrcAudioVideo(t) {
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const prevTrackCount = stream.getTracks().length;
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video.onerror = t.unreached_func("video error");
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video.srcObject = null;
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video.src = "/media/" + AUDIO_VIDEO_TEST.filename;
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await waitForNEvents(stream, "removetrack", prevTrackCount);
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assertStreamStatus(NO_TRACKS);
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await video.play();
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assertStreamStatus(AUDIO_VIDEO_TEST.trackCount);
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}, "src-audio-video");
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promise_test(async function testSrcObjAudioOnly(t) {
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const prevTrackCount = stream.getTracks().length;
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video.onerror = t.unreached_func("video error");
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t.add_cleanup(() => {
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for (const s of nativeStreams) {
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s.getTracks().forEach(track => track.stop());
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}
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video.srcObject = null;
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video.src = "";
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video.removeAttribute("src");
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});
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const ns = await getNoiseStream({audio: true});
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nativeStreams.push(ns);
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video.srcObject = ns;
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await waitForNEvents(stream, "removetrack", prevTrackCount);
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assertStreamStatus(NO_TRACKS);
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await video.play();
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assertStreamStatus(AUDIO_ONLY_TEST.trackCount);
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}, "srcObj-audio-only");
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function assertStreamStatus(trackCount) {
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assert_equals(stream.getTracks().length, trackCount, "stream track count");
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if (trackCount > 0) {
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assert_true(stream.active, "stream must be active");
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} else {
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assert_false(stream.active, "stream must be inactive");
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}
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}
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function waitForNEvents(target, name, count) {
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return new Promise(resolve => {
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let seen = 0;
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function onEvent(e) {
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if (++seen >= count) {
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target.removeEventListener(name, onEvent);
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resolve();
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}
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}
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target.addEventListener(name, onEvent);
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});
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}
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</script>
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</body>
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</html>

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