1 files changed, 61 insertions, 0 deletions
diff --git a/browser/components/customizableui/test/browser_947914_button_zoomOut.js b/browser/components/customizableui/test/browser_947914_button_zoomOut.js
new file mode 100644
index 0000000000..b6175bccf5
--- /dev/null
+++ b/browser/components/customizableui/test/browser_947914_button_zoomOut.js
@@ -0,0 +1,61 @@
+/* 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(async function () {
+  info("Check zoom out button existence and functionality");
+
+  is(ZoomManager.zoom, 1, "Initial zoom factor should be 1");
+
+  CustomizableUI.addWidgetToArea(
+    "zoom-controls",
+    CustomizableUI.AREA_FIXED_OVERFLOW_PANEL
+  );
+
+  registerCleanupFunction(async () => {
+    CustomizableUI.reset();
+    let gContentPrefs = Cc["@mozilla.org/content-pref/service;1"].getService(
+      Ci.nsIContentPrefService2
+    );
+    let gLoadContext = Cu.createLoadContext();
+    await new Promise(resolve => {
+      gContentPrefs.removeByName(window.FullZoom.name, gLoadContext, {
+        handleResult() {},
+        handleCompletion() {
+          resolve();
+        },
+      });
+    });
+  });
+
+  await waitForOverflowButtonShown();
+
+  await document.getElementById("nav-bar").overflowable.show();
+  info("Menu panel was opened");
+
+  let zoomOutButton = document.getElementById("zoom-out-button");
+  ok(zoomOutButton, "Zoom out button exists in Panel Menu");
+
+  zoomOutButton.click();
+  let pageZoomLevel = Math.round(ZoomManager.zoom * 100);
+  console.log("Page zoom level is: ", pageZoomLevel);
+
+  let zoomResetButton = document.getElementById("zoom-reset-button");
+  await TestUtils.waitForCondition(() => {
+    console.log(
+      "Current zoom is ",
+      parseInt(zoomResetButton.getAttribute("label"), 10)
+    );
+    return parseInt(zoomResetButton.getAttribute("label"), 10) == pageZoomLevel;
+  });
+
+  ok(pageZoomLevel < 100, "Page zoomed out correctly");
+
+  // close the panel
+  let panelHiddenPromise = promiseOverflowHidden(window);
+  document.getElementById("widget-overflow").hidePopup();
+  await panelHiddenPromise;
+  info("Menu panel was closed");
+});