1 files changed, 50 insertions, 0 deletions
diff --git a/browser/base/content/test/tabMediaIndicator/browser_destroy_iframe.js b/browser/base/content/test/tabMediaIndicator/browser_destroy_iframe.js
new file mode 100644
index 0000000000..f977d1d664
--- /dev/null
+++ b/browser/base/content/test/tabMediaIndicator/browser_destroy_iframe.js
@@ -0,0 +1,50 @@
+const EMPTY_PAGE_URL = GetTestWebBasedURL("file_empty.html");
+const AUTPLAY_PAGE_URL = GetTestWebBasedURL("file_autoplay_media.html");
+const CORS_AUTPLAY_PAGE_URL = GetTestWebBasedURL(
+  "file_autoplay_media.html",
+  true
+);
+
+/**
+ * When an iframe that has audible media gets destroyed, if there is no other
+ * audible playing media existing in the page, then the sound indicator should
+ * disappear.
+ */
+add_task(async function testDestroyAudibleIframe() {
+  const iframesURL = [AUTPLAY_PAGE_URL, CORS_AUTPLAY_PAGE_URL];
+  for (let iframeURL of iframesURL) {
+    info(`open a tab, create an iframe and load an autoplay media page inside`);
+    const tab = await BrowserTestUtils.openNewForegroundTab(
+      gBrowser,
+      EMPTY_PAGE_URL
+    );
+    await createIframeAndLoadURL(tab, iframeURL);
+
+    info(`sound indicator should appear because of audible playing media`);
+    await waitForTabSoundIndicatorAppears(tab);
+
+    info(`sound indicator should disappear after destroying iframe`);
+    await removeIframe(tab);
+    await waitForTabSoundIndicatorDisappears(tab);
+
+    info("remove tab");
+    BrowserTestUtils.removeTab(tab);
+  }
+});
+
+function createIframeAndLoadURL(tab, url) {
+  // eslint-disable-next-line no-shadow
+  return SpecialPowers.spawn(tab.linkedBrowser, [url], async url => {
+    const iframe = content.document.createElement("iframe");
+    content.document.body.appendChild(iframe);
+    iframe.src = url;
+    info(`load ${url} for iframe`);
+    await new Promise(r => (iframe.onload = r));
+  });
+}
+
+function removeIframe(tab) {
+  return SpecialPowers.spawn(tab.linkedBrowser, [], _ => {
+    content.document.getElementsByTagName("iframe")[0].remove();
+  });
+}