test: Coverage for Notification delegate shim

src/tab-manager/__tests__/browser-notification-shim.test.js

@@ -0,0 +1,44 @@
+describe('Browser Notification Shim test suite', () => {
+  test('Native Notification should be shimmed and used as delegate', () => {
+    // Given
+    const NativeNotification = jest.fn();
+    NativeNotification.maxActions = jest.fn();
+    NativeNotification.permission = jest.fn();
+    NativeNotification.requestPermission = jest.fn();
+    NativeNotification.prototype = {
+      actions: 'Actions', badge: 'Badge', body: 'Body', data: 'Data', dir: 'Dir', lang: 'Lang', tag: 'Tag', icon: 'Icon',
+      image: 'Image', renotify: 'Renotify', requireInteraction: 'RequireInteraction', silent: 'Silent',
+      timestamp: 'Timestamp', title: 'Title', vibrate: 'Vibrate', close: jest.fn()
+    };
+    window.Notification = NativeNotification;
+    require('../browser-notification-shim');
+    // When
+    const notification = new Notification();
+    Notification.maxActions();
+    Notification.permission();
+    Notification.requestPermission();
+    // Then
+    expect(window.Notification).not.toBe(NativeNotification);
+    expect(NativeNotification).toHaveBeenCalledTimes(1);
+    expect(NativeNotification.maxActions).toHaveBeenCalledTimes(1);
+    expect(NativeNotification.permission).toHaveBeenCalledTimes(1);
+    expect(NativeNotification.requestPermission).toHaveBeenCalledTimes(1);
+    expect(notification.actions).toBe('Actions');
+    expect(notification.badge).toBe('Badge');
+    expect(notification.body).toBe('Body');
+    expect(notification.data).toBe('Data');
+    expect(notification.dir).toBe('Dir');
+    expect(notification.lang).toBe('Lang');
+    expect(notification.tag).toBe('Tag');
+    expect(notification.icon).toBe('Icon');
+    expect(notification.image).toBe('Image');
+    expect(notification.renotify).toBe('Renotify');
+    expect(notification.requireInteraction).toBe('RequireInteraction');
+    expect(notification.silent).toBe('Silent');
+    expect(notification.timestamp).toBe('Timestamp');
+    expect(notification.title).toBe('Title');
+    expect(notification.vibrate).toBe('Vibrate');
+    notification.close();
+    expect(NativeNotification.prototype.close).toHaveBeenCalledTimes(1);
+  });
+});

src/tab-manager/browser-notification-shim.js

@@ -14,6 +14,9 @@
    limitations under the License.
  */
 /* eslint-disable no-global-assign,no-native-reassign */
+
+// Delegate for Notification API as specified in: https://notifications.spec.whatwg.org/
+
 const {ipcRenderer} = require('electron');
 const {APP_EVENTS} = require('../constants');
 
@@ -96,10 +99,11 @@ Notification = function() {
       delegate.onshow = func;
     },
     get close() {
-      return delegate.close();
+      return delegate.close;
     }
   };
 };
 
+Notification.maxActions = NativeNotification.maxActions;
 Notification.permission = NativeNotification.permission;
 Notification.requestPermission = NativeNotification.requestPermission;