Test manipulating state with jest

wow.test.js

mport React from 'react';
import { shallow, mount, render } from 'enzyme';
import Todo from '../components/Todo';

import { configure } from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';

configure({ adapter: new Adapter() });

test('Test it', async () => {
  // Render a checkbox with label in the document
  const cart = [
    { name: 'Green', cost: 4 },
    { name: 'Red', cost: 8 },
    { name: 'Blue', cost: 14 }
  ];

  const wrapper = mount(<Todo cart={cart} />);
  const firstInput = wrapper.find('.name');
  firstInput.simulate('change', { target: { value: 'Pink' } });

  const firstCost = wrapper.find('.cost');
  firstCost.simulate('change', { target: { value: 200 } });

  const submitButton = wrapper.find('.addtocart');
  submitButton.simulate('click');

  wrapper.update();

  expect(wrapper.state('price')).toBe(26);

  console.log(wrapper.state());
  console.log(wrapper.props().cart);

});