1 files changed, 42 insertions, 0 deletions
diff --git a/toolkit/content/tests/browser/browser_delay_autoplay_webAudio.js b/toolkit/content/tests/browser/browser_delay_autoplay_webAudio.js
new file mode 100644
index 0000000000..37011c852d
--- /dev/null
+++ b/toolkit/content/tests/browser/browser_delay_autoplay_webAudio.js
@@ -0,0 +1,42 @@
+const PAGE =
+  "https://example.com/browser/toolkit/content/tests/browser/file_webAudio.html";
+
+// 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/);
+}
+
+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_web_audio() {
+  info("- open new background tab -");
+  let tab = BrowserTestUtils.addTab(window.gBrowser, "about:blank");
+  BrowserTestUtils.loadURIString(tab.linkedBrowser, PAGE);
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+
+  info("- tab should be blocked -");
+  await waitForTabBlockEvent(tab, true);
+
+  info("- switch tab -");
+  await BrowserTestUtils.switchTab(window.gBrowser, tab);
+
+  info("- tab should be resumed -");
+  await waitForTabBlockEvent(tab, false);
+
+  info("- tab should be audible -");
+  await waitForTabPlayingEvent(tab, true);
+
+  info("- remove tab -");
+  BrowserTestUtils.removeTab(tab);
+});