1 files changed, 65 insertions, 0 deletions
diff --git a/browser/components/customizableui/test/browser_981418-widget-onbeforecreated-handler.js b/browser/components/customizableui/test/browser_981418-widget-onbeforecreated-handler.js
new file mode 100644
index 0000000000..c3aee43404
--- /dev/null
+++ b/browser/components/customizableui/test/browser_981418-widget-onbeforecreated-handler.js
@@ -0,0 +1,65 @@
+/* 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/. */
+/* eslint-disable mozilla/no-arbitrary-setTimeout */
+
+"use strict";
+const kWidgetId = "test-981418-widget-onbeforecreated";
+
+// Should be able to add broken view widget
+add_task(async function testAddOnBeforeCreatedWidget() {
+  let onBeforeCreatedCalled = false;
+  let widgetSpec = {
+    id: kWidgetId,
+    type: "view",
+    viewId: kWidgetId + "idontexistyet",
+    onBeforeCreated(doc) {
+      let view = doc.createXULElement("panelview");
+      view.id = kWidgetId + "idontexistyet";
+      document.getElementById("appMenu-viewCache").appendChild(view);
+      onBeforeCreatedCalled = true;
+    },
+  };
+
+  CustomizableUI.createWidget(widgetSpec);
+  CustomizableUI.addWidgetToArea(kWidgetId, CustomizableUI.AREA_NAVBAR);
+
+  ok(onBeforeCreatedCalled, "onBeforeCreated should have been called");
+
+  let widgetNode = document.getElementById(kWidgetId);
+  let viewNode = document.getElementById(kWidgetId + "idontexistyet");
+  ok(widgetNode, "Widget should exist");
+  ok(viewNode, "Panelview should exist");
+
+  let viewShownPromise = BrowserTestUtils.waitForEvent(viewNode, "ViewShown");
+  widgetNode.click();
+  await viewShownPromise;
+
+  let widgetPanel = document.getElementById("customizationui-widget-panel");
+  ok(widgetPanel, "Widget panel should exist");
+
+  let panelHiddenPromise = promisePanelElementHidden(window, widgetPanel);
+  widgetPanel.hidePopup();
+  await panelHiddenPromise;
+
+  CustomizableUI.addWidgetToArea(
+    kWidgetId,
+    CustomizableUI.AREA_FIXED_OVERFLOW_PANEL
+  );
+  await waitForOverflowButtonShown();
+  await document.getElementById("nav-bar").overflowable.show();
+
+  viewShownPromise = BrowserTestUtils.waitForEvent(viewNode, "ViewShown");
+  widgetNode.click();
+  await viewShownPromise;
+
+  let panelHidden = promiseOverflowHidden(window);
+  PanelUI.overflowPanel.hidePopup();
+  await panelHidden;
+
+  CustomizableUI.destroyWidget(kWidgetId);
+});
+
+add_task(async function asyncCleanup() {
+  await resetCustomization();
+});