1 files changed, 40 insertions, 0 deletions
diff --git a/browser/base/content/test/tabPrompts/browser_prompt_closed_window.js b/browser/base/content/test/tabPrompts/browser_prompt_closed_window.js
new file mode 100644
index 0000000000..4db3286691
--- /dev/null
+++ b/browser/base/content/test/tabPrompts/browser_prompt_closed_window.js
@@ -0,0 +1,40 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * Check that if we loop prompts from a closed tab, they don't
+ * start showing up as window prompts.
+ */
+add_task(async function test_closed_tab_doesnt_show_prompt() {
+  let newWin = await BrowserTestUtils.openNewBrowserWindow();
+
+  // Get a promise for the initial, in-tab prompt:
+  let promptPromise = BrowserTestUtils.promiseAlertDialogOpen();
+  await ContentTask.spawn(newWin.gBrowser.selectedBrowser, [], function () {
+    // Don't want to block, so use setTimeout with 0 timeout:
+    content.setTimeout(
+      () =>
+        content.eval(
+          'let i = 0; while (!prompt("Prompts a lot!") && i++ < 10);'
+        ),
+      0
+    );
+  });
+  // wait for the first prompt to have appeared:
+  await promptPromise;
+
+  // Now close the containing tab, and check for windowed prompts appearing.
+  let opened = false;
+  let obs = () => {
+    opened = true;
+  };
+  Services.obs.addObserver(obs, "domwindowopened");
+  registerCleanupFunction(() =>
+    Services.obs.removeObserver(obs, "domwindowopened")
+  );
+  await BrowserTestUtils.closeWindow(newWin);
+
+  ok(!opened, "Should not have opened a prompt when closing the main window.");
+});