1 files changed, 78 insertions, 0 deletions
diff --git a/dom/base/test/browser_user_input_handling_delay_invisible_iframe.js b/dom/base/test/browser_user_input_handling_delay_invisible_iframe.js
new file mode 100644
index 0000000000..8227a09a08
--- /dev/null
+++ b/dom/base/test/browser_user_input_handling_delay_invisible_iframe.js
@@ -0,0 +1,78 @@
+/* -*- Mode: JavaScript; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+async function test_user_input_handling_delay_helper(prefs) {
+  await SpecialPowers.pushPrefEnv({
+    set: prefs,
+  });
+
+  const tab = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    `
+    data:text/html,
+    <body>
+      <iframe width="1" height="1" style="position:absolute; top:-9999px; left: -9999px; border-style: none" src="https://example.org/dom/base/test/empty.html"></iframe>
+      <input />
+    </body>`
+  );
+
+  await BrowserTestUtils.reloadTab(tab);
+
+  let iframeFocused = SpecialPowers.spawn(
+    tab.linkedBrowser,
+    [],
+    async function () {
+      let iframe = content.document.querySelector("iframe");
+      await ContentTaskUtils.waitForCondition(function () {
+        return content.document.activeElement == iframe;
+      });
+    }
+  );
+
+  // Now the focus moves to the cross origin iframe
+  await SpecialPowers.spawn(tab.linkedBrowser, [], async function () {
+    content.document.querySelector("iframe").focus();
+  });
+
+  await iframeFocused;
+
+  // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
+  await new Promise(r => setTimeout(r, 1000));
+
+  const inputGetFocused = SpecialPowers.spawn(
+    tab.linkedBrowser,
+    [],
+    async function () {
+      await ContentTaskUtils.waitForEvent(
+        content.document.querySelector("input"),
+        "focus"
+      );
+    }
+  ).then(function () {
+    Assert.ok(
+      true,
+      "Invisible OOP iframe shouldn't prevent user input event handling"
+    );
+  });
+
+  let iframeBC = tab.linkedBrowser.browsingContext.children[0];
+  // Next tab key should move the focus from the iframe to link
+  await BrowserTestUtils.synthesizeKey("KEY_Tab", {}, iframeBC);
+
+  await inputGetFocused;
+
+  BrowserTestUtils.removeTab(tab);
+}
+
+add_task(async function test_InvisibleIframe() {
+  const prefs = [
+    ["dom.input_events.security.minNumTicks", 3],
+    ["dom.input_events.security.minTimeElapsedInMS", 0],
+    ["dom.input_events.security.isUserInputHandlingDelayTest", true],
+  ];
+
+  await test_user_input_handling_delay_helper(prefs);
+});