1 files changed, 60 insertions, 0 deletions
diff --git a/browser/base/content/test/tabMediaIndicator/browser_webAudio_hideSoundPlayingIcon.js b/browser/base/content/test/tabMediaIndicator/browser_webAudio_hideSoundPlayingIcon.js
new file mode 100644
index 0000000000..be40f6e146
--- /dev/null
+++ b/browser/base/content/test/tabMediaIndicator/browser_webAudio_hideSoundPlayingIcon.js
@@ -0,0 +1,60 @@
+/**
+ * This test is used to ensure the 'sound-playing' icon would not disappear after
+ * sites call AudioContext.resume().
+ */
+"use strict";
+
+function setup_test_preference() {
+  return SpecialPowers.pushPrefEnv({
+    set: [
+      ["media.useAudioChannelService.testing", true],
+      ["browser.tabs.delayHidingAudioPlayingIconMS", 0],
+    ],
+  });
+}
+
+async function resumeAudioContext() {
+  const ac = content.ac;
+  await ac.resume();
+  ok(true, "AudioContext is resumed.");
+}
+
+async function testResumeRunningAudioContext() {
+  info(`- create new tab -`);
+  const tab = await BrowserTestUtils.openNewForegroundTab(
+    window.gBrowser,
+    "about:blank"
+  );
+  const browser = tab.linkedBrowser;
+
+  info(`- create audio context -`);
+  // We want the same audio context to be used across different content tasks.
+  await SpecialPowers.spawn(tab.linkedBrowser, [], () => {
+    content.ac = new content.AudioContext();
+    const ac = content.ac;
+    const dest = ac.destination;
+    const osc = ac.createOscillator();
+    osc.connect(dest);
+    osc.start();
+  });
+
+  info(`- wait for 'sound-playing' icon showing -`);
+  await waitForTabSoundIndicatorAppears(tab);
+
+  info(`- resume AudioContext -`);
+  await SpecialPowers.spawn(browser, [], resumeAudioContext);
+
+  info(`- 'sound-playing' icon should still exist -`);
+  await waitForTabSoundIndicatorAppears(tab);
+
+  info(`- remove tab -`);
+  await BrowserTestUtils.removeTab(tab);
+}
+
+add_task(async function start_test() {
+  info("- setup test preference -");
+  await setup_test_preference();
+
+  info("- start testing -");
+  await testResumeRunningAudioContext();
+});