1 files changed, 224 insertions, 0 deletions
diff --git a/dom/media/test/background_video.js b/dom/media/test/background_video.js
new file mode 100644
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+++ b/dom/media/test/background_video.js
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+/* 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/. */
+
+// This file expects manager to be defined in the global scope.
+/* global manager */
+/* import-globals-from manifest.js */
+
+"use strict";
+
+function startTest(test) {
+  info(test.desc);
+  SimpleTest.waitForExplicitFinish();
+  SpecialPowers.pushPrefEnv({ set: test.prefs }, () => {
+    manager.runTests(test.tests, test.runTest);
+  });
+}
+
+function nextVideoEnded(video) {
+  return nextEvent(video, "ended");
+}
+
+function nextVideoPlaying(video) {
+  return nextEvent(video, "playing");
+}
+
+function nextVideoResumes(video) {
+  return nextEvent(video, "mozexitvideosuspend");
+}
+
+function nextVideoSuspends(video) {
+  return nextEvent(video, "mozentervideosuspend");
+}
+
+/**
+ * @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;
+  v.width = width;
+  v.height = height;
+  v.src = url;
+  document.body.appendChild(v);
+  return v;
+}
+
+function appendVideoToDocWithoutLoad(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;
+  return v;
+}
+
+function loadAndWaitUntilLoadedmetadata(video, url, preloadType = "metadata") {
+  return new Promise((resolve, reject) => {
+    video.preload = preloadType;
+    video.addEventListener(
+      "loadedmetadata",
+      () => {
+        resolve();
+      },
+      true
+    );
+    video.src = url;
+  });
+}
+
+/**
+ * @param {HTMLMediaElement} video Video element with under test.
+ * @returns {Promise} Promise that is resolved when video 'visibilitychanged' event fires.
+ */
+function waitUntilVisible(video) {
+  let videoChrome = SpecialPowers.wrap(video);
+  if (videoChrome.isInViewPort) {
+    return Promise.resolve();
+  }
+
+  return new Promise(resolve => {
+    videoChrome.addEventListener("visibilitychanged", () => {
+      if (videoChrome.isInViewPort) {
+        ok(true, `${video.token} is visible.`);
+        videoChrome.removeEventListener("visibilitychanged", this);
+        resolve();
+      }
+    });
+  });
+}
+
+/**
+ * @param {HTMLMediaElement} video Video element under test.
+ * @returns {Promise} Promise that is resolved when video 'playing' event fires.
+ */
+function waitUntilPlaying(video) {
+  var p = once(video, "playing", () => {
+    ok(true, `${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, `${video.token} ended`);
+  });
+}
+
+/**
+ * @param {HTMLMediaElement} video Video element under test.
+ * @returns {Promise} Promise that is resolved when video decode starts
+ *                    suspend timer.
+ */
+function testSuspendTimerStartedWhenHidden(video) {
+  var p = once(video, "mozstartvideosuspendtimer").then(() => {
+    ok(true, `${video.token} suspend begins`);
+  });
+  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 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 {HTMLMediaElement} video Video element under test.
+ * @returns {Promise} Promise that is resolved when video decode resumes.
+ */
+function testVideoOnlySeekCompletedWhenShown(video) {
+  var p = once(video, "mozvideoonlyseekcompleted").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();
+      }
+    });
+  });
+}