1 files changed, 75 insertions, 0 deletions
diff --git a/browser/base/content/test/tabMediaIndicator/browser_mute_webAudio.js b/browser/base/content/test/tabMediaIndicator/browser_mute_webAudio.js
new file mode 100644
index 0000000000..6f3e5f222f
--- /dev/null
+++ b/browser/base/content/test/tabMediaIndicator/browser_mute_webAudio.js
@@ -0,0 +1,75 @@
+// The tab closing code leaves an uncaught rejection. This test has been
+// whitelisted until the issue is fixed.
+if (!gMultiProcessBrowser) {
+  const { PromiseTestUtils } = ChromeUtils.importESModule(
+    "resource://testing-common/PromiseTestUtils.sys.mjs"
+  );
+  PromiseTestUtils.expectUncaughtRejection(/is no longer, usable/);
+}
+
+const PAGE = GetTestWebBasedURL("file_webAudio.html");
+
+function start_webAudio() {
+  var startButton = content.document.getElementById("start");
+  if (!startButton) {
+    ok(false, "Can't get the start button!");
+  }
+
+  startButton.click();
+}
+
+function stop_webAudio() {
+  var stopButton = content.document.getElementById("stop");
+  if (!stopButton) {
+    ok(false, "Can't get the stop button!");
+  }
+
+  stopButton.click();
+}
+
+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 mute_web_audio() {
+  info("- open new tab -");
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    window.gBrowser,
+    "about:blank"
+  );
+  BrowserTestUtils.loadURIString(tab.linkedBrowser, PAGE);
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+
+  info("- tab should be audible -");
+  await waitForTabSoundIndicatorAppears(tab);
+
+  info("- mute browser -");
+  ok(!tab.linkedBrowser.audioMuted, "Audio should not be muted by default");
+  let tabContent = tab.querySelector(".tab-content");
+  await hoverIcon(tabContent);
+  await clickIcon(tab.overlayIcon);
+  ok(tab.linkedBrowser.audioMuted, "Audio should be muted now");
+
+  info("- stop web audip -");
+  await SpecialPowers.spawn(tab.linkedBrowser, [], stop_webAudio);
+
+  info("- start web audio -");
+  await SpecialPowers.spawn(tab.linkedBrowser, [], start_webAudio);
+
+  info("- unmute browser -");
+  ok(tab.linkedBrowser.audioMuted, "Audio should be muted now");
+  await hoverIcon(tabContent);
+  await clickIcon(tab.overlayIcon);
+  ok(!tab.linkedBrowser.audioMuted, "Audio should be unmuted now");
+
+  info("- tab should be audible -");
+  await waitForTabSoundIndicatorAppears(tab);
+
+  info("- remove tab -");
+  BrowserTestUtils.removeTab(tab);
+});