1 files changed, 83 insertions, 0 deletions
diff --git a/browser/components/customizableui/test/browser_987492_window_api.js b/browser/components/customizableui/test/browser_987492_window_api.js
new file mode 100644
index 0000000000..5e69573d60
--- /dev/null
+++ b/browser/components/customizableui/test/browser_987492_window_api.js
@@ -0,0 +1,83 @@
+/* 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";
+
+add_task(async function testOneWindow() {
+  let windows = [];
+  for (let win of CustomizableUI.windows) {
+    windows.push(win);
+  }
+  is(windows.length, 1, "Should have one customizable window");
+});
+
+add_task(async function testOpenCloseWindow() {
+  let newWindow = null;
+  let openListener = {
+    onWindowOpened(window) {
+      newWindow = window;
+    },
+  };
+  CustomizableUI.addListener(openListener);
+
+  {
+    let win = await openAndLoadWindow(null, true);
+    is(
+      newWindow,
+      win,
+      "onWindowOpen event should have received expected window"
+    );
+    isnot(newWindow, null, "Should have gotten onWindowOpen event");
+  }
+
+  CustomizableUI.removeListener(openListener);
+
+  let windows = [];
+  for (let win of CustomizableUI.windows) {
+    windows.push(win);
+  }
+  is(windows.length, 2, "Should have two customizable windows");
+  isnot(
+    windows.indexOf(window),
+    -1,
+    "Current window should be in window collection."
+  );
+  isnot(
+    windows.indexOf(newWindow),
+    -1,
+    "New window should be in window collection."
+  );
+
+  let closedWindow = null;
+  let closeListener = {
+    onWindowClosed(window) {
+      closedWindow = window;
+    },
+  };
+  CustomizableUI.addListener(closeListener);
+  await promiseWindowClosed(newWindow);
+  isnot(closedWindow, null, "Should have gotten onWindowClosed event");
+  is(
+    newWindow,
+    closedWindow,
+    "Closed window should match previously opened window"
+  );
+  CustomizableUI.removeListener(closeListener);
+
+  windows = [];
+  for (let win of CustomizableUI.windows) {
+    windows.push(win);
+  }
+  is(windows.length, 1, "Should have one customizable window");
+  isnot(
+    windows.indexOf(window),
+    -1,
+    "Current window should be in window collection."
+  );
+  is(
+    windows.indexOf(closedWindow),
+    -1,
+    "Closed window should not be in window collection."
+  );
+});