1 files changed, 77 insertions, 0 deletions
diff --git a/toolkit/content/tests/browser/browser_delay_autoplay_multipleMedia.js b/toolkit/content/tests/browser/browser_delay_autoplay_multipleMedia.js
new file mode 100644
index 0000000000..3d60156cf1
--- /dev/null
+++ b/toolkit/content/tests/browser/browser_delay_autoplay_multipleMedia.js
@@ -0,0 +1,77 @@
+/* eslint-disable mozilla/no-arbitrary-setTimeout */
+const PAGE =
+  "https://example.com/browser/toolkit/content/tests/browser/file_multipleAudio.html";
+
+function check_autoplay_audio_onplay() {
+  let autoPlay = content.document.getElementById("autoplay");
+  if (!autoPlay) {
+    ok(false, "Can't get the audio element!");
+  }
+
+  return new Promise((resolve, reject) => {
+    autoPlay.onplay = () => {
+      ok(false, "Should not receive play event!");
+      this.onplay = null;
+      reject();
+    };
+
+    autoPlay.pause();
+    autoPlay.play();
+
+    content.setTimeout(() => {
+      ok(true, "Doesn't receive play event when media was blocked.");
+      autoPlay.onplay = null;
+      resolve();
+    }, 1000);
+  });
+}
+
+function play_nonautoplay_audio_should_be_blocked() {
+  let nonAutoPlay = content.document.getElementById("nonautoplay");
+  if (!nonAutoPlay) {
+    ok(false, "Can't get the audio element!");
+  }
+
+  nonAutoPlay.play();
+  ok(nonAutoPlay.paused, "The blocked audio can't be playback.");
+}
+
+add_task(async function setup_test_preference() {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["media.useAudioChannelService.testing", true],
+      ["media.block-autoplay-until-in-foreground", true],
+    ],
+  });
+});
+
+add_task(async function block_multiple_media() {
+  info("- open new background tab -");
+  let tab = BrowserTestUtils.addTab(window.gBrowser, "about:blank");
+  let browser = tab.linkedBrowser;
+  BrowserTestUtils.loadURI(browser, PAGE);
+  await BrowserTestUtils.browserLoaded(browser);
+
+  info("- tab should be blocked -");
+  await waitForTabBlockEvent(tab, true);
+
+  info("- autoplay media should be blocked -");
+  await SpecialPowers.spawn(browser, [], check_autoplay_audio_onplay);
+
+  info("- non-autoplay can't start playback when the tab is blocked -");
+  await SpecialPowers.spawn(
+    browser,
+    [],
+    play_nonautoplay_audio_should_be_blocked
+  );
+
+  info("- select tab as foreground tab -");
+  await BrowserTestUtils.switchTab(window.gBrowser, tab);
+
+  info("- tab should be resumed -");
+  await waitForTabPlayingEvent(tab, true);
+  await waitForTabBlockEvent(tab, false);
+
+  info("- remove tab -");
+  BrowserTestUtils.removeTab(tab);
+});