import React from 'react'
import { shallow } from 'enzyme'
import isEqual from 'lodash/isEqual'

class TestComponent extends React.Component {
  static defaultProps = {
    myProp: 'should exist',
  }

  shouldComponentUpdate(nextProps) {
    return !isEqual(nextProps, this.props)
  }

  componentDidUpdate(prevProps) {
    if (typeof prevProps.myProp === 'undefined') {
      throw new Error('"myProp" disappeared')
    }
  }

  render() {
    return null
  }
}

describe('Example', function() {
  it('should pass', function() {
    const fetchNamedRelationship = sinon.spy()
    const wrapper = shallow(<TestComponent example="example" />)

    // Nothing is changed here
    wrapper.setProps({ example: 'example' })

    // Add something new
    wrapper.setProps({ somethingElse: '' })
  })
})

{
    myProp: 'should exist'
    example: 'example'
}

{
    example: 'example'
}