зеркало из https://github.com/mozilla/gecko-dev.git
111 строки
3.4 KiB
HTML
111 строки
3.4 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<title>WebVTT : cue should be displayed properly after seeking</title>
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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<script src="manifest.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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</head>
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<body>
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<script class="testbody" type="text/javascript">
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/**
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* This test is used to ensure that the cue should be showed or hid correctly
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* after seeking. In this test, we have two cues which are not overlapped, so
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* there should only have one cue showing at a time.
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*/
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var CUES_INFO = [
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{ id: 0, startTime: 1, endTime: 3, text: "This is cue 0."},
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{ id: 1, startTime: 4, endTime: 6, text: "This is cue 1."},
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];
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async function startTest() {
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const video = createVideo();
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const cues = createCues(video);
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await startVideo(video);
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await seekVideo(video, cues[0].startTime);
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await waitUntilCueIsShowing(cues[0]);
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checkActiveCueAndInactiveCue(cues[0], cues[1]);
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await seekVideo(video, cues[1].startTime);
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await waitUntilCueIsShowing(cues[1]);
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checkActiveCueAndInactiveCue(cues[1], cues[0]);
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// seek forward again
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await seekVideo(video, cues[0].startTime);
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await waitUntilCueIsShowing(cues[0]);
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checkActiveCueAndInactiveCue(cues[0], cues[1]);
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removeNodeAndSource(video);
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SimpleTest.finish();
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}
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SimpleTest.waitForExplicitFinish();
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onload = startTest;
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/**
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* The following are test helper functions.
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*/
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function checkActiveCueAndInactiveCue(activeCue, inactiveCue) {
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ok(activeCue.getActive,
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`cue ${activeCue.id} [${activeCue.startTime}:${activeCue.endTime}] is active`);
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ok(!inactiveCue.getActive,
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`cue ${inactiveCue.id} [${inactiveCue.startTime}:${inactiveCue.endTime}] is inactive`);
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}
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function createVideo() {
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let video = document.createElement("video");
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video.src = "gizmo.mp4";
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video.controls = true;
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document.body.appendChild(video);
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return video;
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}
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function createCues(video) {
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let track = video.addTextTrack("subtitles");
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track.mode = "showing";
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let cue0 = new VTTCue(CUES_INFO[0].startTime, CUES_INFO[0].endTime,
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CUES_INFO[0].text);
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cue0.id = CUES_INFO[0].id;
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let cue1 = new VTTCue(CUES_INFO[1].startTime, CUES_INFO[1].endTime,
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CUES_INFO[1].text);
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cue1.id = CUES_INFO[1].id;
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track.addCue(cue0);
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track.addCue(cue1);
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// Convert them to chrome objects in order to use chrome privilege APIs.
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cue0 = SpecialPowers.wrap(cue0);
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cue1 = SpecialPowers.wrap(cue1);
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return [cue0, cue1];
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}
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async function startVideo(video) {
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info(`start play video`);
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const played = video && await video.play().then(() => true, () => false);
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ok(played, "video has started playing");
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}
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async function waitUntilCueIsShowing(cue) {
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info(`wait until cue ${cue.id} shows`);
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// cue has not been showing yet.
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if (!cue.getActive) {
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await once(cue, "enter");
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}
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info(`cue ${cue.id} is showing`);
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}
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async function seekVideo(video, time) {
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ok(isInRange(time, CUES_INFO[0].startTime, CUES_INFO[0].endTime) ||
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isInRange(time, CUES_INFO[1].startTime, CUES_INFO[1].endTime),
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`seek target time ${time} is within the correct range`)
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info(`seek video to ${time}`);
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video.currentTime = time;
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await once(video, "seeked");
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info(`seek succeeded, current time=${video.currentTime}`);
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}
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function isInRange(value, lowerBound, higherBound) {
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return lowerBound <= value && value <= higherBound;
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}
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</script>
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</body>
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</html>
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