ImageView-test.js

import 'react-native';
import React from 'react';
import ImageView from '../imageview';
import { shallow } from 'enzyme';
import toJson from 'enzyme-to-json';
import errorImage from '../assets/error.png';

test('renders imageview with uri source', () => {
  const wrapper = shallow(<ImageView source={'https://facebook.github.io/react/img/logo_og.png'} />);
  const tree = toJson(wrapper);
  expect(tree).toMatchSnapshot();
});
test('renders imageview with number source', () => {
  const wrapper = shallow(<ImageView source={errorImage} />);
  const tree = toJson(wrapper);
  expect(tree).toMatchSnapshot();
});
test('renders imageview without source', () => {
  const wrapper = shallow(<ImageView source={null} />);
  const tree = toJson(wrapper);
  expect(tree).toEqual("");
});
test('renders imageview with style and source', () => {
  const wrapper = shallow(<ImageView style={{ width: 44, height: 44 }} source={'https://facebook.github.io/react/img/logo_og.png'} />);
  const tree = toJson(wrapper);
  expect(tree.props.style).toBeDefined();
});
test('renders imageview to have width and height without it defined in style', () => {
  const wrapper = shallow(<ImageView style={{ flex: 1 }} source={'https://facebook.github.io/react/img/logo_og.png'} />);
  const tree = toJson(wrapper);
  expect(tree.props.style.width).toBe(36);
  expect(tree.props.style.height).toBe(36);
});