rn-material-ui-textfield/src/components/counter/test.js

Material UI textfield

import 'react-native';
import React from 'react';
import renderer from 'react-test-renderer';

import Counter from '.';

/* eslint-env jest */

const props = {
  baseColor: 'blue',
  errorColor: 'red',
  fontSize: 12,
};

it('renders null when limit is not set', () => {
  let counter = renderer.create(<Counter count={1} {...props} />).toJSON();

  expect(counter).toBeNull();
});

it('renders when limit is set', () => {
  let counter = renderer
    .create(<Counter count={1} limit={1} {...props} />)
    .toJSON();

  expect(counter).toMatchSnapshot();
});

it('renders when limit is exceeded', () => {
  let counter = renderer
    .create(<Counter count={2} limit={1} {...props} />)
    .toJSON();

  expect(counter).toMatchSnapshot();
});