Testing NextJS getInitialProps with Enzyme

If you're using NextJs, you probably want to test getInitialProps on your pages. You can call it from your un-instantiated imported class, and use the props it returns to instantiate an Enzyme wrapper. Here's a nice little pattern:

import { shallow } from 'enzyme'
import MyPage from '../components/my-page'

describe('My Page', () => {
  var wrapper
  
  beforeEach(async () => {
    const props = await MyPage.getInitialProps()
    wrapper = shallow(<MyPage {...props} />)
  })
})