React Jest test

MyComponent.test.js

import React from 'react';
import TestRenderer from 'react-test-renderer';
import TextField from './TextField';

function MyComponent() {
  return <TextField placeholder="bar" />;
}

const testRenderer = TestRenderer.create(<MyComponent />);
const testInstance = testRenderer.toJSON();

it('should be a div', () => {
  expect(testInstance.type).toBe('div');
});