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