test4-test.js

import { Provider } from "react-redux";
import configureStore from "redux-mock-store";
// ...

describe('App', () => {

  // ...

  describe('Question', () => {
    // - setup redux store
    const mockReduxStore = configureStore();
    const initialReduxState = { chosenAnswers: [], setChosenAnswers: () => {} };
    const reduxStore = mockReduxStore(initialReduxState);

    const getButton = question => question.find('Button');
    const wrapperProps = index => ({ index, result: data.results[0] });
    const wrapper = props => mount(<Provider store={reduxStore}><Question {...props} /></Provider>);

    test('Should have only one Next button for the first question', () => {
      // - when
      const firstQuestion = wrapper(wrapperProps(0));
      // - then
      expect(getButton(firstQuestion).text()).toEqual('next');
      expect(getButton(firstQuestion).length).toEqual(1);
    });
  });