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Diffstat (limited to 'dom/media/webvtt/test/mochitest/test_texttrack_mode_change_during_loading.html')
-rw-r--r-- | dom/media/webvtt/test/mochitest/test_texttrack_mode_change_during_loading.html | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/dom/media/webvtt/test/mochitest/test_texttrack_mode_change_during_loading.html b/dom/media/webvtt/test/mochitest/test_texttrack_mode_change_during_loading.html new file mode 100644 index 0000000000..974f452092 --- /dev/null +++ b/dom/media/webvtt/test/mochitest/test_texttrack_mode_change_during_loading.html @@ -0,0 +1,75 @@ +<!DOCTYPE HTML> +<html> +<head> + <title>WebVTT : changing track's mode during loading</title> + <script src="/tests/SimpleTest/SimpleTest.js"></script> + <script src="manifest.js"></script> + <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/> +</head> +<body> +<script class="testbody" type="text/javascript"> +/** + * This test is to ensure that we won't get `error` event when we change track's + * mode during loading. In this test, track element starts loading after setting + * the src and we would start another load later just after the channel which is + * used to fetch data starts. The second load is triggered by mode changes, and + * it should stop the prevous load and won't generate any error. + */ +async function startTest() { + const video = createVideo(); + const trackElement = createAndAppendtrackElemententToVideo(video); + + await changeTrackModeDuringLoading(trackElement); + await waitUntilTrackLoaded(trackElement); + + removeNodeAndSource(video); + SimpleTest.finish(); +} + +SimpleTest.waitForExplicitFinish(); +SpecialPowers.pushPrefEnv({"set": [["media.webvtt.testing.events", true]]}, + startTest); + +/** + * The following are test helper functions. + */ +function createVideo() { + info(`create video`); + let video = document.createElement("video"); + video.src = "gizmo.mp4"; + document.body.appendChild(video); + return video; +} + +function createAndAppendtrackElemententToVideo(video) { + let trackElement = document.createElement("track"); + trackElement.default = true; + video.append(trackElement); + return trackElement; +} + +async function changeTrackModeDuringLoading(trackElement) { + info(`set src to start loading`); + trackElement.src = "basic.vtt"; + + info(`wait until starting loading resource.`); + await once(trackElement, "mozStartedLoadingTextTrack"); + + info(`changeing track's mode during loading should not cause loading failed.`); + trackElement.onerror = () => { + ok(false, `Should not get error event!`); + } + trackElement.track.mode = "hidden"; +} + +async function waitUntilTrackLoaded(trackElement) { + 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."); +} +</script> +</body> +</html> |