1 files changed, 29 insertions, 0 deletions
diff --git a/browser/components/customizableui/test/browser_927717_customize_drag_empty_toolbar.js b/browser/components/customizableui/test/browser_927717_customize_drag_empty_toolbar.js
new file mode 100644
index 0000000000..340e840d83
--- /dev/null
+++ b/browser/components/customizableui/test/browser_927717_customize_drag_empty_toolbar.js
@@ -0,0 +1,29 @@
+/* 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";
+
+const kTestToolbarId = "test-empty-drag";
+
+// Attempting to drag an item to an empty container should work.
+add_task(async function () {
+  await createToolbarWithPlacements(kTestToolbarId, []);
+  await startCustomizing();
+  let libraryButton = document.getElementById("library-button");
+  let customToolbar = document.getElementById(kTestToolbarId);
+  simulateItemDrag(libraryButton, customToolbar);
+  assertAreaPlacements(kTestToolbarId, ["library-button"]);
+  ok(
+    libraryButton.parentNode &&
+      libraryButton.parentNode.parentNode == customToolbar,
+    "Button should really be in toolbar"
+  );
+  await endCustomizing();
+  removeCustomToolbars();
+});
+
+add_task(async function asyncCleanup() {
+  await endCustomizing();
+  await resetCustomization();
+});