react-testing-2

react-testing-2.js

describe('when valid email was filled', () => {
  beforeEach(() => {
    subscribe = jest.fn();
    wrapper = mount(<Subscription subscribe={subscribe}/>);
  });
  
  describe('and when form was submitted', () => {
    beforeEach(() => {
      ...
      wrapper.find('#email').simulate('change', {target: {name: 'email', value: 'blah@gmail.com'}});
      wrapper.find('#submit').simulate('submit');
    });

    it('should subscribe to the news with correct email', () => {
      expect(subscribe).toHaveBeenCalledWith({email: 'blah@gmail.com'});
    });
  });
});