1 files changed, 115 insertions, 0 deletions
diff --git a/dom/media/test/background_video.js b/dom/media/test/background_video.js
new file mode 100644
index 000000000..06618d30f
--- /dev/null
+++ b/dom/media/test/background_video.js
@@ -0,0 +1,115 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+/* jshint esversion: 6, -W097 */
+/* globals SimpleTest, SpecialPowers, info, is, ok */
+
+"use strict";
+
+function startTest(test) {
+  info(test.desc);
+  SimpleTest.waitForExplicitFinish();
+  SpecialPowers.pushPrefEnv({ 'set': test.prefs }, () => {
+    manager.runTests(test.tests, test.runTest);
+  });
+}
+
+/**
+ * @param {string} url video src.
+ * @returns {HTMLMediaElement} The created video element.
+ */
+function appendVideoToDoc(url, token, width, height) {
+  // Default size of (160, 120) is used by other media tests.
+  if (width === undefined) { width = 160; }
+  if (height === undefined) { height = 3*width/4; }
+
+  let v = document.createElement('video');
+  v.token = token;
+  document.body.appendChild(v);
+  v.width = width;
+  v.height = height;
+  v.src = url;
+  return v;
+}
+
+/**
+ * @param {HTMLMediaElement} video Video element under test.
+ * @returns {Promise} Promise that is resolved when video 'playing' event fires and rejected on error.
+ */
+function waitUntilPlaying(video) {
+  var p = once(video, 'playing', () => { ok(true, video.token + " played."); });
+  Log(video.token, "Start playing");
+  video.play();
+  return p;
+}
+
+/**
+ * @param {HTMLMediaElement} video Video element under test.
+ * @returns {Promise} Promise which is resolved when video 'ended' event fires.
+ */
+function waitUntilEnded(video) {
+  Log(video.token, "Waiting for ended");
+  if (video.ended) {
+    ok(true, video.token + " already ended");
+    return Promise.resolve();
+  }
+
+  return once(video, 'ended', () => { ok(true, video.token + " ended"); });
+}
+
+/**
+ * @param {HTMLMediaElement} video Video element under test.
+ * @returns {Promise} Promise that is resolved when video decode suspends.
+ */
+function testVideoSuspendsWhenHidden(video) {
+  let p = once(video, 'mozentervideosuspend').then(() => {
+    ok(true, video.token + " suspends");
+  });
+  Log(video.token, "Set hidden");
+  video.setVisible(false);
+  return p;
+}
+
+/**
+ * @param {HTMLMediaElement} video Video element under test.
+ * @returns {Promise} Promise that is resolved when video decode resumes.
+ */
+function testVideoResumesWhenShown(video) {
+  var p  = once(video, 'mozexitvideosuspend').then(() => {
+    ok(true, video.token + " resumes");
+  });
+  Log(video.token, "Set visible");
+  video.setVisible(true);
+  return p;
+}
+
+/**
+ * @param {HTMLVideoElement} video Video element under test.
+ * @returns {Promise} Promise that is resolved if video ends and rejects if video suspends.
+ */
+function checkVideoDoesntSuspend(video) {
+  let p = Promise.race([
+    waitUntilEnded(video).then(() => { ok(true, video.token + ' ended before decode was suspended')}),
+    once(video, 'mozentervideosuspend', () => { Promise.reject(new Error(video.token + ' suspended')) })
+  ]);
+  Log(video.token, "Set hidden.");
+  video.setVisible(false);
+  return p;
+}
+
+/**
+ * @param {HTMLMediaElement} video Video element under test.
+ * @param {number} time video current time to wait til.
+ * @returns {Promise} Promise that is resolved once currentTime passes time.
+ */
+function waitTil(video, time) {
+  Log(video.token, "Waiting for time to reach " + time + "s");
+  return new Promise(resolve => {
+    video.addEventListener('timeupdate', function timeUpdateEvent() {
+      if (video.currentTime > time) {
+        video.removeEventListener(name, timeUpdateEvent);
+        resolve();
+      }
+    });
+  });
+}