1 files changed, 65 insertions, 0 deletions
diff --git a/toolkit/content/tests/browser/browser_delay_autoplay_cross_origin_navigation.js b/toolkit/content/tests/browser/browser_delay_autoplay_cross_origin_navigation.js
new file mode 100644
index 0000000000..03e008b9da
--- /dev/null
+++ b/toolkit/content/tests/browser/browser_delay_autoplay_cross_origin_navigation.js
@@ -0,0 +1,65 @@
+/**
+ * This test is used to ensure that media would still be able to play even if
+ * the page has been navigated to a cross-origin url.
+ */
+"use strict";
+
+add_task(async function setupTestEnvironment() {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["media.autoplay.default", 0],
+      ["media.block-autoplay-until-in-foreground", true],
+    ],
+  });
+});
+
+add_task(async function testCrossOriginNavigation() {
+  info("Create a new foreground tab");
+  const tab = await BrowserTestUtils.openNewForegroundTab(
+    window.gBrowser,
+    "about:blank"
+  );
+
+  info("As tab has been visited, media should be allowed to start");
+  const MEDIA_FILE = "gizmo.mp4";
+  await SpecialPowers.spawn(
+    tab.linkedBrowser,
+    [getTestWebBasedURL(MEDIA_FILE)],
+    async url => {
+      let vid = content.document.createElement("video");
+      vid.src = url;
+      ok(
+        await vid.play().then(
+          _ => true,
+          _ => false
+        ),
+        "video started playing"
+      );
+    }
+  );
+
+  info("Navigate to a cross-origin video file");
+  BrowserTestUtils.loadURIString(
+    tab.linkedBrowser,
+    getTestWebBasedURL(MEDIA_FILE, { crossOrigin: true })
+  );
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+
+  info(
+    "As tab has been visited, a cross-origin media should also be able to start"
+  );
+  await SpecialPowers.spawn(tab.linkedBrowser, [], async _ => {
+    let vid = content.document.querySelector("video");
+    ok(vid, "Video exists");
+    ok(
+      await vid.play().then(
+        _ => true,
+        _ => false
+      ),
+      "video started playing"
+    );
+  });
+
+  info("Remove tab");
+  BrowserTestUtils.removeTab(tab);
+});