1 files changed, 79 insertions, 0 deletions
diff --git a/dom/media/mediacontrol/tests/browser/browser_media_control_stop_timer.js b/dom/media/mediacontrol/tests/browser/browser_media_control_stop_timer.js
new file mode 100644
index 0000000000..34fc10badd
--- /dev/null
+++ b/dom/media/mediacontrol/tests/browser/browser_media_control_stop_timer.js
@@ -0,0 +1,79 @@
+// Import this in order to use `triggerPictureInPicture()`.
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/toolkit/components/pictureinpicture/tests/head.js",
+  this
+);
+
+const PAGE_NON_AUTOPLAY =
+  "https://example.com/browser/dom/media/mediacontrol/tests/browser/file_non_autoplay.html";
+
+const testVideoId = "video";
+
+add_task(async function setupTestingPref() {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["media.mediacontrol.testingevents.enabled", true],
+      ["media.mediacontrol.stopcontrol.timer", true],
+      ["media.mediacontrol.stopcontrol.timer.ms", 0],
+    ],
+  });
+});
+
+/**
+ * This test is used to check the stop timer for media element, which would stop
+ * media control for the specific element when the element has been paused over
+ * certain length of time. (That is controlled by the value of the pref
+ * `media.mediacontrol.stopcontrol.timer.ms`) In this test, we set the pref to 0
+ * which means the stop timer would be triggered after the media is paused.
+ * However, if the media is being used in PIP mode, we won't start the stop
+ * timer for it.
+ */
+add_task(async function testStopMediaControlAfterPausingMedia() {
+  info(`open media page`);
+  const tab = await createLoadedTabWrapper(PAGE_NON_AUTOPLAY);
+
+  info(`start media`);
+  await playMedia(tab, testVideoId);
+
+  info(`pause media and the stop timer would stop media control`);
+  await pauseMediaAndMediaControlShouldBeStopped(tab, testVideoId);
+
+  info(`remove tab`);
+  await tab.close();
+});
+
+add_task(async function testNotToStopMediaControlForPIPVideo() {
+  info(`open media page`);
+  const tab = await createLoadedTabWrapper(PAGE_NON_AUTOPLAY);
+
+  info(`start media`);
+  await playMedia(tab, testVideoId);
+
+  info(`trigger PIP mode`);
+  const winPIP = await triggerPictureInPicture(tab.linkedBrowser, testVideoId);
+
+  info(`pause media and the stop timer would not stop media control`);
+  await pauseMedia(tab, testVideoId);
+
+  info(`pressing 'play' key should start PIP video again`);
+  await generateMediaControlKeyEvent("play");
+  await checkOrWaitUntilMediaStartedPlaying(tab, testVideoId);
+
+  info(`remove tab`);
+  await BrowserTestUtils.closeWindow(winPIP);
+  await tab.close();
+});
+
+/**
+ * The following is helper function.
+ */
+function pauseMediaAndMediaControlShouldBeStopped(tab, elementId) {
+  // After pausing media, the stop timer would be triggered and stop the media
+  // control.
+  return Promise.all([
+    new Promise(r => (tab.controller.ondeactivated = r)),
+    SpecialPowers.spawn(tab.linkedBrowser, [elementId], Id => {
+      content.document.getElementById(Id).pause();
+    }),
+  ]);
+}