1 files changed, 46 insertions, 0 deletions
diff --git a/browser/components/customizableui/test/browser_1087303_button_fullscreen.js b/browser/components/customizableui/test/browser_1087303_button_fullscreen.js
new file mode 100644
index 000000000..c6b87d6ab
--- /dev/null
+++ b/browser/components/customizableui/test/browser_1087303_button_fullscreen.js
@@ -0,0 +1,46 @@
+/* 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(function*() {
+  info("Check fullscreen button existence and functionality");
+
+  yield PanelUI.show();
+
+  let fullscreenButton = document.getElementById("fullscreen-button");
+  ok(fullscreenButton, "Fullscreen button appears in Panel Menu");
+
+  let fullscreenPromise = promiseFullscreenChange();
+  fullscreenButton.click();
+  yield fullscreenPromise;
+
+  ok(window.fullScreen, "Fullscreen mode was opened");
+
+  // exit full screen mode
+  fullscreenPromise = promiseFullscreenChange();
+  window.fullScreen = !window.fullScreen;
+  yield fullscreenPromise;
+
+  ok(!window.fullScreen, "Successfully exited fullscreen");
+});
+
+function promiseFullscreenChange() {
+  let deferred = Promise.defer();
+  info("Wait for fullscreen change");
+
+  let timeoutId = setTimeout(() => {
+    window.removeEventListener("fullscreen", onFullscreenChange, true);
+    deferred.reject("Fullscreen change did not happen within " + 20000 + "ms");
+  }, 20000);
+
+  function onFullscreenChange(event) {
+    clearTimeout(timeoutId);
+    window.removeEventListener("fullscreen", onFullscreenChange, true);
+    info("Fullscreen event received");
+    deferred.resolve();
+  }
+  window.addEventListener("fullscreen", onFullscreenChange, true);
+  return deferred.promise;
+}