1 files changed, 47 insertions, 0 deletions
diff --git a/browser/components/customizableui/test/browser_969427_recreate_destroyed_widget_after_reset.js b/browser/components/customizableui/test/browser_969427_recreate_destroyed_widget_after_reset.js
new file mode 100644
index 0000000000..8207cd5737
--- /dev/null
+++ b/browser/components/customizableui/test/browser_969427_recreate_destroyed_widget_after_reset.js
@@ -0,0 +1,47 @@
+/* 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";
+
+function getPlacementArea(id) {
+  let placement = CustomizableUI.getPlacementOfWidget(id);
+  return placement && placement.area;
+}
+
+// Check that a destroyed widget recreated after a reset call goes to
+// the navigation bar.
+add_task(function () {
+  const kWidgetId = "test-recreate-after-reset";
+  let spec = {
+    id: kWidgetId,
+    label: "Test re-create after reset.",
+    removable: true,
+    defaultArea: CustomizableUI.AREA_NAVBAR,
+  };
+
+  CustomizableUI.createWidget(spec);
+  is(
+    getPlacementArea(kWidgetId),
+    CustomizableUI.AREA_NAVBAR,
+    "widget is in the navigation bar"
+  );
+
+  CustomizableUI.destroyWidget(kWidgetId);
+  isnot(
+    getPlacementArea(kWidgetId),
+    CustomizableUI.AREA_NAVBAR,
+    "widget removed from the navigation bar"
+  );
+
+  CustomizableUI.reset();
+
+  CustomizableUI.createWidget(spec);
+  is(
+    getPlacementArea(kWidgetId),
+    CustomizableUI.AREA_NAVBAR,
+    "widget recreated and added back to the nav bar"
+  );
+
+  CustomizableUI.destroyWidget(kWidgetId);
+});