jest adn enzyme testing code example

Example 1: enzye check if it renders

describe('when x', () => {
  it('check if child renders', () => {
    const wrapper = shallow(<Parent />);
    expect(wrapper.find(ChildComponentName).length).toEqual(1);
  });
});

Example 2: react enzyme

// global config react and enzyme

import { configure } from 'enzyme'
import Adapter from 'enzyme-adapter-react-16'
import { shallow, mount, render } from 'enzyme'
import renderer from 'react-test-renderer'

configure({ adapter: new Adapter() })

global.shallow = shallow
global.mount = mount
global.render = render
global.renderer = renderer