1 files changed, 52 insertions, 0 deletions
diff --git a/browser/components/extensions/test/browser/browser_ext_autoplayInBackground.js b/browser/components/extensions/test/browser/browser_ext_autoplayInBackground.js
new file mode 100644
index 0000000000..e082b1e9bf
--- /dev/null
+++ b/browser/components/extensions/test/browser/browser_ext_autoplayInBackground.js
@@ -0,0 +1,52 @@
+"use strict";
+
+function setup_test_preference(enableScript) {
+  return SpecialPowers.pushPrefEnv({
+    set: [
+      ["media.autoplay.default", 1],
+      ["media.autoplay.blocking_policy", 0],
+      ["media.autoplay.allow-extension-background-pages", enableScript],
+    ],
+  });
+}
+
+async function testAutoplayInBackgroundScript(enableScript) {
+  info(`- setup test preference, enableScript=${enableScript} -`);
+  await setup_test_preference(enableScript);
+
+  let extension = ExtensionTestUtils.loadExtension({
+    background() {
+      browser.test.log("- create audio in background page -");
+      let audio = new Audio();
+      audio.src =
+        "https://example.com/browser/browser/components/extensions/test/browser/silence.ogg";
+      audio.play().then(
+        function () {
+          browser.test.log("play succeed!");
+          browser.test.sendMessage("play-succeed");
+        },
+        function () {
+          browser.test.log("play promise was rejected!");
+          browser.test.sendMessage("play-failed");
+        }
+      );
+    },
+  });
+
+  await extension.startup();
+
+  if (enableScript) {
+    await extension.awaitMessage("play-succeed");
+    ok(true, "play promise was resolved!");
+  } else {
+    await extension.awaitMessage("play-failed");
+    ok(true, "play promise was rejected!");
+  }
+
+  await extension.unload();
+}
+
+add_task(async function testMain() {
+  await testAutoplayInBackgroundScript(true /* enable autoplay */);
+  await testAutoplayInBackgroundScript(false /* enable autoplay */);
+});