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This changeset adds a gUM_support.js to dom/media/test/. This file provides functions to setup prefs for loopback or fake device selection before gUM calls are made. This is useful for configuring tests and providing an explicit point of reference for settings, rather than the implicit ones provided by the harness. Updates tests so that the new helper functions are called before gUM. This will result in loopback prefs being set if loopback device names are detected, if not then fake devices will be used. This also removes the use of the fake constraint in gUM calls. Update touched tests to use some more modern JS. No behavioural changes were made (except in minor cases, but functionality should be the same). These changes are largely as follows: - var -> let - async is used in places where I felt it improved readability - semicolons added to various event handler assignments MozReview-Commit-ID: 1HuE8thBA6w --HG-- extra : rebase_source : b866056b2821436cf34ea683421c200b4bb4e55f
88 lines
3.6 KiB
JavaScript
88 lines
3.6 KiB
JavaScript
// Support script for test that use getUserMedia. This allows explicit
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// configuration of prefs which affect gUM. See also
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// `testing/mochitest/runtests.py` for how the harness configures values.
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// Setup preconditions for tests using getUserMedia. This functions helps
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// manage different prefs that affect gUM calls in tests and makes explicit
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// the expected state before test runs.
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async function pushGetUserMediaTestPrefs({
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fakeAudio = false,
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fakeVideo = false,
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loopbackAudio = false,
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loopbackVideo = false}) {
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// Make sure we have sensical arguments
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if (!fakeAudio && !loopbackAudio) {
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throw new Error("pushGetUserMediaTestPrefs: Should have fake or loopback audio!");
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} else if (fakeAudio && loopbackAudio) {
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throw new Error("pushGetUserMediaTestPrefs: Should not have both fake and loopback audio!");
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}
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if (!fakeVideo && !loopbackVideo) {
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throw new Error("pushGetUserMediaTestPrefs: Should have fake or loopback video!");
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} else if (fakeVideo && loopbackVideo) {
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throw new Error("pushGetUserMediaTestPrefs: Should not have both fake and loopback video!");
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}
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let testPrefs = [];
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if (fakeAudio) {
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// Unset the loopback device so it doesn't take precedence
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testPrefs.push(["media.audio_loopback_dev", ""]);
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// Setup fake streams pref
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testPrefs.push(["media.navigator.streams.fake", true]);
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}
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if (loopbackAudio) {
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// If audio loopback is requested we expect the test harness to have set
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// the loopback device pref, make sure it's set
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let audioLoopDev = SpecialPowers.getCharPref("media.audio_loopback_dev", "");
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if (!audioLoopDev) {
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throw new Error("pushGetUserMediaTestPrefs: Loopback audio requested but " +
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"media.audio_loopback_dev does not appear to be set!");
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}
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}
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if (fakeVideo) {
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// Unset the loopback device so it doesn't take precedence
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testPrefs.push(["media.video_loopback_dev", ""]);
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// Setup fake streams pref
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testPrefs.push(["media.navigator.streams.fake", true]);
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}
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if (loopbackVideo) {
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// If video loopback is requested we expect the test harness to have set
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// the loopback device pref, make sure it's set
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let videoLoopDev = SpecialPowers.getCharPref("media.video_loopback_dev", "");
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if (!videoLoopDev) {
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throw new Error("pushGetUserMediaTestPrefs: Loopback video requested but " +
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"media.video_loopback_dev does not appear to be set!");
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}
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}
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if (loopbackAudio || loopbackVideo) {
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// Prevent gUM permission prompt. Since loopback devices are considered
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// real devices we need to set prefs so the gUM prompt isn't presented.
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testPrefs.push(['media.navigator.permission.disabled', true]);
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}
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return SpecialPowers.pushPrefEnv({set: testPrefs});
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}
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// Setup preconditions for tests using getUserMedia. This function will
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// configure prefs to select loopback device(s) if it can find loopback device
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// names already set in the prefs. If no loopback device name can be found then
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// prefs are setup such that a fake device is used.
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async function setupGetUserMediaTestPrefs() {
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prefRequests = {};
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let audioLoopDev = SpecialPowers.getCharPref("media.audio_loopback_dev", "");
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if (audioLoopDev) {
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prefRequests.fakeAudio = false;
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prefRequests.loopbackAudio = true;
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} else {
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prefRequests.fakeAudio = true;
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prefRequests.loopbackAudio = false;
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}
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let videoLoopDev = SpecialPowers.getCharPref("media.video_loopback_dev", "");
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if (videoLoopDev) {
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prefRequests.fakeVideo = false;
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prefRequests.loopbackVideo = true;
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} else {
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prefRequests.fakeVideo = true;
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prefRequests.loopbackVideo = false;
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}
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return pushGetUserMediaTestPrefs(prefRequests);
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}
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