Circle transition animation jest test

CircleTransitionJest.js

import 'react-native'
import React from 'react'
import CircleTransition from '../CircleTransition.js'

// Note: test renderer must be required after react-native.
import renderer from 'react-test-renderer'

const positionTest = (position) => {
  const tree = renderer.create(
    <CircleTransition
      color={'orange'}
      position={position}
      expand
      callback={() => {
        console.log('transition done callback')
      }}
      customLeftMargin={100}
      customTopMargin={100}
    />
  ).toJSON()
  expect(tree).toMatchSnapshot()
}

it('renders correctly with default props', () => {
  const tree = renderer.create(
    <CircleTransition callback={() => {
      console.log('transition done callback')
    }} />
  )
})

it('renders correctly when position is center', () => {
  positionTest('center')
})

// other positions