Jest test mock class method

test.js

it('should redirect to another page', () => {
  const user = {
    id: 1,
    token: 'J9gj9fj90.Tgf84h8Ufds.jfiosdjfi',
  };
  
//   static method
  const spy = jest.spyOn(Login, 'redirectUser');
  mount(<Login user={user} />, global.contextData);
  expect(spy).toBeCalled();

//   Method by Spy on
  const mockRedirectUser = jest.spyOn(wrapper.instance(), 'componentDidMount');
  expect(mockRedirectUser).toHaveBeenCalled();
  
//   Method by jest.fn()
  wrapper.instance().redirectUser = jest.fn();
  expect(wrapper.instance().redirectUser).toBeCalled();
});