message: Add mock for setFullScreenable
diff: @@ -15,6 +15,7 @@ const getMainWindow = {
  isAlwaysOnTop: jest.fn(() => true),
  setMenuBarVisibility: jest.fn(),
  setAlwaysOnTop: jest.fn(),
  + setFullScreenable: jest.fn(),
  };
  jest.mock('../src/common/env', () => {
  