1 files changed, 43 insertions, 0 deletions
diff --git a/devtools/client/responsive/test/browser/browser_window_close.js b/devtools/client/responsive/test/browser/browser_window_close.js
new file mode 100644
index 0000000000..2af3d7fdd8
--- /dev/null
+++ b/devtools/client/responsive/test/browser/browser_window_close.js
@@ -0,0 +1,43 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+addRDMTask(
+  null,
+  async function () {
+    const NEW_WINDOW_URL =
+      "data:text/html;charset=utf-8,New window opened via window.open";
+    const newWindowPromise = BrowserTestUtils.waitForNewWindow({
+      // Passing the url param so the Promise will resolve once DOMContentLoaded is emitted
+      // on the new window tab
+      url: NEW_WINDOW_URL,
+    });
+    window.open(NEW_WINDOW_URL, "_blank", "noopener,all");
+
+    const newWindow = await newWindowPromise;
+    ok(true, "Got new window");
+
+    info("Focus new window");
+    newWindow.focus();
+
+    info("Open RDM");
+    const tab = newWindow.gBrowser.selectedTab;
+    const { ui } = await openRDM(tab);
+    await waitForDeviceAndViewportState(ui);
+
+    ok(
+      ResponsiveUIManager.isActiveForTab(tab),
+      "ResponsiveUI should be active for tab when the window is closed"
+    );
+
+    // Close the window on a tab with an active responsive design UI and
+    // wait for the UI to gracefully shutdown.  This has leaked the window
+    // in the past.
+    info("Close the new window");
+    const offPromise = once(ResponsiveUIManager, "off");
+    await BrowserTestUtils.closeWindow(newWindow);
+    await offPromise;
+  },
+  { onlyPrefAndTask: true }
+);