1 files changed, 43 insertions, 0 deletions
diff --git a/browser/components/customizableui/test/browser_934113_menubar_removable.js b/browser/components/customizableui/test/browser_934113_menubar_removable.js
new file mode 100644
index 0000000000..8f41baba7a
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+++ b/browser/components/customizableui/test/browser_934113_menubar_removable.js
@@ -0,0 +1,43 @@
+/* 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";
+
+// Attempting to drag the menubar to the navbar shouldn't work.
+add_task(async function () {
+  await startCustomizing();
+  let menuItems = document.getElementById("menubar-items");
+  let navbar = document.getElementById("nav-bar");
+  let menubar = document.getElementById("toolbar-menubar");
+  // Force the menu to be shown.
+  const kAutohide = menubar.getAttribute("autohide");
+  menubar.setAttribute("autohide", "false");
+  simulateItemDrag(menuItems, CustomizableUI.getCustomizationTarget(navbar));
+
+  is(
+    getAreaWidgetIds("nav-bar").indexOf("menubar-items"),
+    -1,
+    "Menu bar shouldn't be in the navbar."
+  );
+  ok(
+    !navbar.querySelector("#menubar-items"),
+    "Shouldn't find menubar items in the navbar."
+  );
+  ok(
+    menubar.querySelector("#menubar-items"),
+    "Should find menubar items in the menubar."
+  );
+  isnot(
+    getAreaWidgetIds("toolbar-menubar").indexOf("menubar-items"),
+    -1,
+    "Menubar items shouldn't be missing from the navbar."
+  );
+  menubar.setAttribute("autohide", kAutohide);
+  await endCustomizing();
+});
+
+add_task(async function asyncCleanup() {
+  await endCustomizing();
+  await resetCustomization();
+});