1 files changed, 42 insertions, 0 deletions
diff --git a/browser/base/content/test/tabMediaIndicator/browser_mediaPlayback.js b/browser/base/content/test/tabMediaIndicator/browser_mediaPlayback.js
new file mode 100644
index 0000000000..9a5f457403
--- /dev/null
+++ b/browser/base/content/test/tabMediaIndicator/browser_mediaPlayback.js
@@ -0,0 +1,42 @@
+const PAGE = GetTestWebBasedURL("file_mediaPlayback.html");
+const FRAME = GetTestWebBasedURL("file_mediaPlaybackFrame.html");
+
+function wait_for_event(browser, event) {
+  return BrowserTestUtils.waitForEvent(browser, event, false, e => {
+    is(
+      e.originalTarget,
+      browser,
+      "Event must be dispatched to correct browser."
+    );
+    ok(!e.cancelable, "The event should not be cancelable");
+    return true;
+  });
+}
+
+async function test_on_browser(url, browser) {
+  info(`run test for ${url}`);
+  const startPromise = wait_for_event(browser, "DOMAudioPlaybackStarted");
+  BrowserTestUtils.loadURIString(browser, url);
+  await startPromise;
+  await wait_for_event(browser, "DOMAudioPlaybackStopped");
+}
+
+add_task(async function test_page() {
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: "about:blank",
+    },
+    test_on_browser.bind(undefined, PAGE)
+  );
+});
+
+add_task(async function test_frame() {
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: "about:blank",
+    },
+    test_on_browser.bind(undefined, FRAME)
+  );
+});