Setting up MSW with Jest

setupMsw.test.js

import { rest } from 'msw'
import { setupServer } from 'msw/node'

describe('LoginForm', () => {
  let server

  beforeAll(() => {
    server = setupServer(
      rest.post('/auth/login/', (request, response, context) => {
        const username = request.body.username
        const password = request.body.password
        if (username === 'alice' && password === 'topsecret')
          return response(context.json({ key: 'topsecretkey' }))
        else if (username === 'alice' && password === 'wrongpassword')
          return response(
            context.status(400),
            context.json({ non_field_errors: 'Wrong password' })
          )
        else throw new Error('Something went wrong')
      })
    )
    server.listen()
  })

  afterAll(() => {
    server.close()
  })
})