1 files changed, 69 insertions, 0 deletions
diff --git a/browser/components/customizableui/test/browser_1484275_PanelMultiView_toggle_with_other_popup.js b/browser/components/customizableui/test/browser_1484275_PanelMultiView_toggle_with_other_popup.js
new file mode 100644
index 0000000000..89b86dba20
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+++ b/browser/components/customizableui/test/browser_1484275_PanelMultiView_toggle_with_other_popup.js
@@ -0,0 +1,69 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_URL = "data:text/html,<html><body></body></html>";
+
+/**
+ * Test steps that may lead to the panel being stuck on Windows (bug 1484275).
+ */
+add_task(async function test_PanelMultiView_toggle_with_other_popup() {
+  // For proper cleanup, create a bookmark that we will remove later.
+  let bookmark = await PlacesUtils.bookmarks.insert({
+    parentGuid: PlacesUtils.bookmarks.unfiledGuid,
+    url: TEST_URL,
+  });
+  registerCleanupFunction(() => PlacesUtils.bookmarks.remove(bookmark));
+
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: TEST_URL,
+    },
+    async function (browser) {
+      // 1. Open the main menu.
+      await gCUITestUtils.openMainMenu();
+
+      // 2. Open another popup not managed by PanelMultiView.
+      StarUI._createPanelIfNeeded();
+      let bookmarkPanel = document.getElementById("editBookmarkPanel");
+      let shown = BrowserTestUtils.waitForEvent(bookmarkPanel, "popupshown");
+      let hidden = BrowserTestUtils.waitForEvent(bookmarkPanel, "popuphidden");
+      EventUtils.synthesizeKey("D", { accelKey: true });
+      await shown;
+
+      // 3. Click the button to which the main menu is anchored. We need a native
+      // mouse event to simulate the exact platform behavior with popups.
+      let clickFn = () =>
+        EventUtils.promiseNativeMouseEventAndWaitForEvent({
+          type: "click",
+          target: document.getElementById("PanelUI-button"),
+          atCenter: true,
+          eventTypeToWait: "mouseup",
+        });
+
+      // On Windows and macOS, the operation will close both popups.
+      if (AppConstants.platform == "win" || AppConstants.platform == "macosx") {
+        await gCUITestUtils.hidePanelMultiView(PanelUI.panel, clickFn);
+        await new Promise(resolve => executeSoon(resolve));
+
+        // 4. Test that the popup can be opened again after it's been closed.
+        await gCUITestUtils.openMainMenu();
+        Assert.equal(PanelUI.panel.state, "open");
+      } else {
+        // On other platforms, the operation will close both popups and reopen the
+        // main menu immediately, so we wait for the reopen to occur.
+        shown = BrowserTestUtils.waitForEvent(PanelUI.mainView, "ViewShown");
+        clickFn();
+        await shown;
+      }
+
+      await gCUITestUtils.hideMainMenu();
+
+      // Make sure the events for the bookmarks panel have also been processed
+      // before closing the tab and removing the bookmark.
+      await hidden;
+    }
+  );
+});