1 files changed, 47 insertions, 0 deletions
diff --git a/toolkit/components/pictureinpicture/tests/browser_thirdPartyIframe.js b/toolkit/components/pictureinpicture/tests/browser_thirdPartyIframe.js
new file mode 100644
index 0000000000..cf63768d85
--- /dev/null
+++ b/toolkit/components/pictureinpicture/tests/browser_thirdPartyIframe.js
@@ -0,0 +1,47 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * Tests that videos hosted inside of a third-party <iframe> can be opened
+ * in a Picture-in-Picture window.
+ */
+add_task(async () => {
+  for (let videoID of ["with-controls", "no-controls"]) {
+    info(`Testing ${videoID} case.`);
+
+    await BrowserTestUtils.withNewTab(
+      {
+        url: TEST_PAGE_WITH_IFRAME,
+        gBrowser,
+      },
+      async browser => {
+        // TEST_PAGE_WITH_IFRAME is hosted at a different domain from TEST_PAGE,
+        // so loading TEST_PAGE within the iframe will act as our third-party
+        // iframe.
+        await SpecialPowers.spawn(browser, [TEST_PAGE], async TEST_PAGE => {
+          let iframe = content.document.getElementById("iframe");
+          let loadPromise = ContentTaskUtils.waitForEvent(iframe, "load");
+          iframe.src = TEST_PAGE;
+          await loadPromise;
+        });
+
+        let iframeBc = browser.browsingContext.children[0];
+
+        if (gFissionBrowser) {
+          Assert.notEqual(
+            browser.browsingContext.currentWindowGlobal.osPid,
+            iframeBc.currentWindowGlobal.osPid,
+            "The iframe should be running in a different process."
+          );
+        }
+
+        let pipWin = await triggerPictureInPicture(iframeBc, videoID);
+        ok(pipWin, "Got Picture-in-Picture window.");
+
+        await ensureMessageAndClosePiP(iframeBc, videoID, pipWin, true);
+      }
+    );
+  }
+});