1 files changed, 110 insertions, 0 deletions
diff --git a/browser/base/content/test/fullscreen/browser_fullscreen_window_focus.js b/browser/base/content/test/fullscreen/browser_fullscreen_window_focus.js
new file mode 100644
index 0000000000..7c935f64d3
--- /dev/null
+++ b/browser/base/content/test/fullscreen/browser_fullscreen_window_focus.js
@@ -0,0 +1,110 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+async function pause() {
+  /* eslint-disable mozilla/no-arbitrary-setTimeout */
+  return new Promise(resolve => setTimeout(resolve, 500));
+}
+
+// This test tends to trigger a race in the fullscreen time telemetry,
+// where the fullscreen enter and fullscreen exit events (which use the
+// same histogram ID) overlap. That causes TelemetryStopwatch to log an
+// error.
+SimpleTest.ignoreAllUncaughtExceptions(true);
+
+const IFRAME_ID = "testIframe";
+
+async function testWindowFocus(isPopup, iframeID) {
+  let tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, TEST_URL);
+
+  info("Calling window.open()");
+  let openedWindow = await jsWindowOpen(tab.linkedBrowser, isPopup, iframeID);
+  info("Letting OOP focus to stabilize");
+  await pause(); // Bug 1719659 for proper fix
+  info("re-focusing main window");
+  await waitForFocus(tab.linkedBrowser);
+
+  info("Entering full-screen");
+  await changeFullscreen(tab.linkedBrowser, true);
+
+  await testExpectFullScreenExit(tab.linkedBrowser, true, async () => {
+    info("Calling window.focus()");
+    await jsWindowFocus(tab.linkedBrowser, iframeID);
+  });
+
+  // Cleanup
+  if (isPopup) {
+    openedWindow.close();
+  } else {
+    BrowserTestUtils.removeTab(openedWindow);
+  }
+  BrowserTestUtils.removeTab(tab);
+}
+
+async function testWindowElementFocus(isPopup) {
+  let tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, TEST_URL);
+
+  info("Calling window.open()");
+  let openedWindow = await jsWindowOpen(tab.linkedBrowser, isPopup);
+  info("Letting OOP focus to stabilize");
+  await pause(); // Bug 1719659 for proper fix
+  info("re-focusing main window");
+  await waitForFocus(tab.linkedBrowser);
+
+  info("Entering full-screen");
+  await changeFullscreen(tab.linkedBrowser, true);
+
+  await testExpectFullScreenExit(tab.linkedBrowser, false, async () => {
+    info("Calling element.focus() on popup");
+    await ContentTask.spawn(tab.linkedBrowser, {}, async args => {
+      await content.wrappedJSObject.sendMessage(
+        content.wrappedJSObject.openedWindow,
+        "elementfocus"
+      );
+    });
+  });
+
+  // Cleanup
+  await changeFullscreen(tab.linkedBrowser, false);
+  if (isPopup) {
+    openedWindow.close();
+  } else {
+    BrowserTestUtils.removeTab(openedWindow);
+  }
+  BrowserTestUtils.removeTab(tab);
+}
+
+add_setup(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["dom.disable_open_during_load", false], // Allow window.focus calls without user interaction
+      ["browser.link.open_newwindow.disabled_in_fullscreen", false],
+    ],
+  });
+});
+
+add_task(function test_popupWindowFocus() {
+  return testWindowFocus(true);
+});
+
+add_task(function test_iframePopupWindowFocus() {
+  return testWindowFocus(true, IFRAME_ID);
+});
+
+add_task(function test_popupWindowElementFocus() {
+  return testWindowElementFocus(true);
+});
+
+add_task(function test_backgroundTabFocus() {
+  return testWindowFocus(false);
+});
+
+add_task(function test_iframebackgroundTabFocus() {
+  return testWindowFocus(false, IFRAME_ID);
+});
+
+add_task(function test_backgroundTabElementFocus() {
+  return testWindowElementFocus(false);
+});