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This patch do two things in order to trigger loading for track element and wait for correct event to check track's and cues' status after loading finished. (1) listen track element's load event There are some tests listening video's loadedmetadata, but it's wrong. The loading process of media element and track element are completely non-related. If you would like to check track element's status, you should wait for track element's load event. (2) enable track explictly If the text track which has default attribute is added to the media element before the media element starts running automatic track selection [1], then it would be enable by the media element. Otherwise, you have to enable track explicitly by changing its track mode. [1] https://html.spec.whatwg.org/multipage/media.html#sourcing-out-of-band-text-tracks:text-track-7 Differential Revision: https://phabricator.services.mozilla.com/D31913 --HG-- extra : moz-landing-system : lando
300 lines
11 KiB
HTML
300 lines
11 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<title>Test for Bug 833386 - HTMLTrackElement</title>
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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<script type="text/javascript" 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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<video id="v" src="seek.webm" preload="metadata">
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<track src="basic.vtt" kind="subtitles" id="default" default>
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</video>
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<script type="text/javascript">
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/**
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* This test is used to test the VTTCue's different behaviors and check whether
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* cues would be activatived correctly during video playback.
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*/
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var video = document.getElementById("v");
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var trackElement = document.getElementById("default");
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async function runTest() {
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await waitUntiTrackLoaded();
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checkCueDefinition();
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checkFirstCueParsedContent();
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checkCueStartTimeAndEndtime();
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checkCueSizeAndPosition();
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checkCueSnapToLines();
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checkCueAlignmentAndWritingDirection();
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checkCueLine();
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checkCreatingNewCue();
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checkRemoveNonExistCue();
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checkActiveCues();
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checkCueRegion();
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await checkCActiveCuesDuringVideoPlaying();
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SimpleTest.finish();
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}
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SimpleTest.waitForExplicitFinish();
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SpecialPowers.pushPrefEnv({"set": [["media.webvtt.regions.enabled", true]]},
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runTest);
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/**
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* The following are test helper functions.
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*/
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async function waitUntiTrackLoaded() {
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if (trackElement.readyState != 2) {
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info(`wait until the track finishes loading`);
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await once(trackElement, "load");
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}
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is(trackElement.readyState, 2, "Track::ReadyState should be set to LOADED.");
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is(trackElement.track.cues.length, 6, "Cue list length should be 6.");
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}
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function checkCueDefinition() {
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// Check that the typedef of TextTrackCue works in Gecko.
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isnot(window.TextTrackCue, undefined, "TextTrackCue should be defined.");
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isnot(window.VTTCue, undefined, "VTTCue should be defined.");
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}
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function checkFirstCueParsedContent() {
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// Check if first cue was parsed correctly.
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const cue = trackElement.track.cues[0];
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ok(cue instanceof TextTrackCue, "Cue should be an instanceof TextTrackCue.");
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ok(cue instanceof VTTCue, "Cue should be an instanceof VTTCue.");
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is(cue.id, "1", "Cue's ID should be 1.");
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is(cue.startTime, 0.5, "Cue's start time should be 0.5.");
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is(cue.endTime, 0.7, "Cue's end time should be 0.7.");
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is(cue.pauseOnExit, false, "Cue's pause on exit flag should be false.");
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is(cue.text, "This", "Cue's text should be set correctly.");
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is(cue.track, trackElement.track, "Cue's track should be defined.");
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cue.track = null;
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isnot(cue.track, null, "Cue's track should not be able to be set.");
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}
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function checkCueStartTimeAndEndtime() {
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const cueList = trackElement.track.cues;
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// Check that all cue times were not rounded
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is(cueList[1].startTime, 1.2, "Second cue's start time should be 1.2.");
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is(cueList[1].endTime, 2.4, "Second cue's end time should be 2.4.");
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is(cueList[2].startTime, 2, "Third cue's start time should be 2.");
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is(cueList[2].endTime, 3.5, "Third cue's end time should be 3.5.");
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is(cueList[3].startTime, 2.71, "Fourth cue's start time should be 2.71.");
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is(cueList[3].endTime, 2.91, "Fourth cue's end time should be 2.91.");
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is(cueList[4].startTime, 3.217, "Fifth cue's start time should be 3.217.");
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is(cueList[4].endTime, 3.989, "Fifth cue's end time should be 3.989.");
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is(cueList[5].startTime, 3.217, "Sixth cue's start time should be 3.217.");
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is(cueList[5].endTime, 3.989, "Sixth cue's end time should be 3.989.");
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// Check that Cue setters are working correctly.
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const cue = trackElement.track.cues[0];
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cue.id = "Cue 01";
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is(cue.id, "Cue 01", "Cue's ID should be 'Cue 01'.");
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cue.startTime = 0.51;
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is(cue.startTime, 0.51, "Cue's start time should be 0.51.");
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cue.endTime = 0.71;
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is(cue.endTime, 0.71, "Cue's end time should be 0.71.");
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cue.pauseOnExit = true;
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is(cue.pauseOnExit, true, "Cue's pause on exit flag should be true.");
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video.addEventListener("pause", function() {
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video.play();
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}, {once: true});
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}
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function checkCueSizeAndPosition() {
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function checkPercentageValue(prop, initialVal) {
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ok(prop in cue, prop + " should be a property on VTTCue.");
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cue[prop] = initialVal;
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is(cue[prop], initialVal, `Cue's ${prop} should initially be ${initialVal}`);
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[ 101, -1 ].forEach(function(val) {
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exceptionHappened = false;
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try {
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cue[prop] = val;
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} catch(e) {
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exceptionHappened = true;
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is(e.name, "IndexSizeError", "Should have thrown IndexSizeError.");
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}
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ok(exceptionHappened, "Exception should have happened.");
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});
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}
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const cue = trackElement.track.cues[0];
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checkPercentageValue("size", 100.0);
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cue.size = 50.5;
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is(cue.size, 50.5, "Cue's size should be 50.5.")
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// Check cue.position
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checkPercentageValue("position", "auto");
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cue.position = 50.5;
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is(cue.position, 50.5, "Cue's position value should now be 50.5.");
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}
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function checkCueSnapToLines() {
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const cue = trackElement.track.cues[0];
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ok(cue.snapToLines, "Cue's snapToLines should be set by set.");
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cue.snapToLines = false;
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ok(!cue.snapToLines, "Cue's snapToLines should not be set.");
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}
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function checkCueAlignmentAndWritingDirection() {
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function checkEnumValue(prop, initialVal, acceptedValues) {
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ok(prop in cue, `${prop} should be a property on VTTCue.`);
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is(cue[prop], initialVal, `Cue's ${prop} should be ${initialVal}`);
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cue[prop] = "bogus";
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is(cue[prop], initialVal, `Cue's ${prop} should be ${initialVal}`);
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acceptedValues.forEach(function(val) {
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cue[prop] = val;
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is(cue[prop], val, `Cue's ${prop} should be ${val}`);
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if (typeof val === "string") {
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cue[prop] = val.toUpperCase();
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is(cue[prop], val, `Cue's ${prop} should be ${val}`);
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}
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});
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}
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const cue = trackElement.track.cues[0];
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checkEnumValue("align", "center", [ "start", "left", "center", "right", "end" ]);
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checkEnumValue("lineAlign", "start", [ "start", "center", "end" ]);
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checkEnumValue("vertical", "", [ "", "lr", "rl" ]);
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cue.lineAlign = "center";
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is(cue.lineAlign, "center", "Cue's line align should be center.");
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cue.lineAlign = "START";
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is(cue.lineAlign, "center", "Cue's line align should be center.");
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cue.lineAlign = "end";
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is(cue.lineAlign, "end", "Cue's line align should be end.");
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// Check that cue position align works properly
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is(cue.positionAlign, "auto", "Cue's default position alignment should be auto.");
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cue.positionAlign = "line-left";
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is(cue.positionAlign, "line-left", "Cue's position align should be line-left.");
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cue.positionAlign = "auto";
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is(cue.positionAlign, "auto", "Cue's position align should be auto.");
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cue.positionAlign = "line-right";
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is(cue.positionAlign, "line-right", "Cue's position align should be line-right.");
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}
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function checkCueLine() {
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const cue = trackElement.track.cues[0];
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// Check cue.line
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is(cue.line, "auto", "Cue's line value should initially be auto.");
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cue.line = 0.5;
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is(cue.line, 0.5, "Cue's line value should now be 0.5.");
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cue.line = "auto";
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is(cue.line, "auto", "Cue's line value should now be auto.");
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}
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function checkCreatingNewCue() {
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const cueList = trackElement.track.cues;
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// Check that we can create and add new VTTCues
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let vttCue = new VTTCue(3.999, 4, "foo");
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is(vttCue.track, null, "Cue's track should be null.");
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trackElement.track.addCue(vttCue);
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is(vttCue.track, trackElement.track, "Cue's track should be defined.");
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is(cueList.length, 7, "Cue list length should now be 7.");
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// Check that new VTTCue was added correctly
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let cue = cueList[6];
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is(cue.startTime, 3.999, "Cue's start time should be 3.999.");
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is(cue.endTime, 4, "Cue's end time should be 4.");
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is(cue.text, "foo", "Cue's text should be foo.");
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// Adding the same cue again should not increase the cue count.
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trackElement.track.addCue(vttCue);
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is(cueList.length, 7, "Cue list length should be 7.");
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// Check that we are able to remove cues.
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trackElement.track.removeCue(cue);
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is(cueList.length, 6, "Cue list length should be 6.");
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}
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function checkRemoveNonExistCue() {
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is(trackElement.track.cues.length, 6, "Cue list length should be 6.");
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let exceptionHappened = false;
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try {
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// We should not be able to remove a cue that is not in the list.
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trackElement.track.removeCue(new VTTCue(1, 2, "foo"));
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} catch (e) {
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// "NotFoundError" should be thrown when trying to remove a cue that is
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// not in the list.
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is(e.name, "NotFoundError", "Should have thrown NotFoundError.");
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exceptionHappened = true;
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}
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// If this is false then we did not throw an error and probably removed a cue
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// when we shouln't have.
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ok(exceptionHappened, "Exception should have happened.");
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is(trackElement.track.cues.length, 6, "Cue list length should still be 6.");
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}
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function checkActiveCues() {
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video.currentTime = 2;
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isnot(trackElement.track.activeCues, null);
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trackElement.track.mode = "disabled";
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is(trackElement.track.activeCues, null, "No active cue when track is disabled.");
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trackElement.track.mode = "showing";
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}
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function checkCueRegion() {
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let regionInfo = [
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{ lines: 2, width: 30 },
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{ lines: 4, width: 20 },
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{ lines: 2, width: 30 }
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];
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for (let i = 0; i < regionInfo.length; i++) {
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let cue = trackElement.track.cues[i];
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isnot(cue.region, null, `Cue at ${i} should have a region.`);
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for (let key in regionInfo[i]) {
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is(cue.region[key], regionInfo[i][key],
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`Region should have a ${key} property with a value of ${regionInfo[i][key]}`);
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}
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}
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}
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async function checkCActiveCuesDuringVideoPlaying() {
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// Test TextTrack::ActiveCues.
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let cueInfo = [
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{ startTime: 0.51, endTime: 0.71, ids: ["Cue 01"] },
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{ startTime: 0.72, endTime: 1.19, ids: [] },
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{ startTime: 1.2, endTime: 1.9, ids: [2] },
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{ startTime: 2, endTime: 2.4, ids: [2, 2.5] },
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{ startTime: 2.41, endTime: 2.70, ids: [2.5] },
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{ startTime: 2.71, endTime: 2.91, ids: [2.5, 3] },
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{ startTime: 2.92, endTime: 3.216, ids: [2.5] },
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{ startTime: 3.217, endTime: 3.5, ids: [2.5, 4, 5] },
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{ startTime: 3.51, endTime: 3.989, ids: [4, 5] },
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{ startTime: 3.99, endTime: 4, ids: [] }
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];
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video.addEventListener("timeupdate", function() {
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let activeCues = trackElement.track.activeCues,
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found = false,
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playbackTime = video.currentTime;
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for (let i = 0; i < cueInfo.length; i++) {
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let cue = cueInfo[i];
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if (playbackTime >= cue.startTime && playbackTime < cue.endTime) {
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is(activeCues.length, cue.ids.length, `There should be ${cue.ids.length} currently active cue(s).`);
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for (let j = 0; j < cue.ids.length; j++) {
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isnot(activeCues.getCueById(cue.ids[j]), undefined,
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`The cue with ID ${cue.ids[j]} should be active.`);
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}
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break;
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}
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}
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});
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info(`start video from 0s.`);
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video.currentTime = 0;
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video.play();
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await once(video, "playing");
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info(`video starts playing.`);
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await once(video, "ended");
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}
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</script>
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</body>
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</html>
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