hello-person.driver.tsx

import { HelloPerson, Props } from './hello_person.component';
import { shallow } from 'enzyme';
import * as dataService from '../services/data-service';

export class HelloPersonDriver {
  private wrapper;
  private props: Props = {
    name: 'some name'
  }

  given = {
    name: (value: string): this => {
      this.props.name = value;
      return this;
    }
  };

  when = {
    rendered: (): this => {
      jest.spyOn(dataService, 'reportUserLogin').mockReturnValue(Promise.resolve('OK'));
      this.wrapper = shallow<HelloPerson>(<HelloPerson {...this.props} />);
      return this;
    }
  };
  
  get = {
    renderedName: (): string => this.wrapper.find('#name').text(),
    reportSpy: () => dataService.reportUserLogin
  };
}