1 files changed, 62 insertions, 0 deletions
diff --git a/browser/components/customizableui/test/browser_947914_button_newPrivateWindow.js b/browser/components/customizableui/test/browser_947914_button_newPrivateWindow.js
new file mode 100644
index 0000000000..cc8842a3e8
--- /dev/null
+++ b/browser/components/customizableui/test/browser_947914_button_newPrivateWindow.js
@@ -0,0 +1,62 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+add_task(async function () {
+  info("Check private browsing button existence and functionality");
+  CustomizableUI.addWidgetToArea(
+    "privatebrowsing-button",
+    CustomizableUI.AREA_FIXED_OVERFLOW_PANEL
+  );
+  registerCleanupFunction(() => CustomizableUI.reset());
+
+  await waitForOverflowButtonShown();
+
+  await document.getElementById("nav-bar").overflowable.show();
+  info("Menu panel was opened");
+
+  let windowWasHandled = false;
+  let privateWindow = null;
+
+  let observerWindowOpened = {
+    observe(aSubject, aTopic, aData) {
+      if (aTopic == "domwindowopened") {
+        privateWindow = aSubject;
+        privateWindow.addEventListener(
+          "load",
+          function () {
+            is(
+              privateWindow.location.href,
+              AppConstants.BROWSER_CHROME_URL,
+              "A new browser window was opened"
+            );
+            ok(
+              PrivateBrowsingUtils.isWindowPrivate(privateWindow),
+              "Window is private"
+            );
+            windowWasHandled = true;
+          },
+          { once: true }
+        );
+      }
+    },
+  };
+
+  Services.ww.registerNotification(observerWindowOpened);
+
+  let privateBrowsingButton = document.getElementById("privatebrowsing-button");
+  ok(privateBrowsingButton, "Private browsing button exists in Panel Menu");
+  privateBrowsingButton.click();
+
+  try {
+    await TestUtils.waitForCondition(() => windowWasHandled);
+    await promiseWindowClosed(privateWindow);
+    info("The new private window was closed");
+  } catch (e) {
+    ok(false, "The new private browser window was not properly handled");
+  } finally {
+    Services.ww.unregisterNotification(observerWindowOpened);
+  }
+});