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import { createNext, FileRef } from 'e2e-utils'
import { NextInstance } from 'e2e-utils'
import { fetchViaHTTP, renderViaHTTP } from 'next-test-utils'
import path from 'path'
import type { Response } from 'node-fetch'

async function serialize(response: Response) {
  return {
    text: await response.text(),
    headers: Object.fromEntries(response.headers),
    status: response.status,
  }
}

describe('Edge can read request body', () => {
  let next: NextInstance

  beforeAll(async () => {
    next = await createNext({
      files: new FileRef(path.resolve(__dirname, './app')),
      dependencies: {},
    })
  })
  afterAll(() => next.destroy())

  it('renders the static page', async () => {
    const html = await renderViaHTTP(next.url, '/api/nothing')
    expect(html).toContain('ok')
  })

  describe('middleware', () => {
    it('reads a JSON body', async () => {
      const response = await fetchViaHTTP(
        next.url,
        '/api/nothing?middleware-handler=json',
        null,
        {
          method: 'POST',
          body: JSON.stringify({ hello: 'world' }),
        }
      )
      expect(await serialize(response)).toMatchObject({
        text: expect.stringContaining('ok'),
        status: 200,
        headers: {
          'x-req-type': 'json',
          'x-serialized': '{"hello":"world"}',
        },
      })
    })

    it('reads a text body', async () => {
      try {
        const response = await fetchViaHTTP(
          next.url,
          '/api/nothing?middleware-handler=text',
          null,
          {
            method: 'POST',
            body: JSON.stringify({ hello: 'world' }),
          }
        )

        expect(await serialize(response)).toMatchObject({
          text: expect.stringContaining('ok'),
          status: 200,
          headers: {
            'x-req-type': 'text',
            'x-serialized': '{"hello":"world"}',
          },
        })
      } catch (err) {
        console.log('FAILED', err)
      }
    })

    it('reads an URL encoded form data', async () => {
      const response = await fetchViaHTTP(
        next.url,
        '/api/nothing?middleware-handler=formData',
        null,
        {
          method: 'POST',
          headers: {
            'Content-Type': 'application/x-www-form-urlencoded',
          },
          body: new URLSearchParams({ hello: 'world' }).toString(),
        }
      )
      expect(await serialize(response)).toMatchObject({
        text: expect.stringContaining('ok'),
        status: 200,
        headers: {
          'x-req-type': 'formData',
          'x-serialized': '{"hello":"world"}',
        },
      })
    })

    it('reads a multipart form data', async () => {
      const formData = new FormData()
      formData.append('hello', 'world')

      // @ts-expect-error use `fetchViaHTTP` when we drop `node-fetch`
      const response: Response = await fetch(
        new URL(next.url + '/api/nothing?middleware-handler=formData'),
        { method: 'POST', body: formData }
      )

      expect(await serialize(response)).toMatchObject({
        text: expect.stringContaining('ok'),
        status: 200,
        headers: {
          'x-req-type': 'formData',
          'x-serialized': '{"hello":"world"}',
        },
      })
    })
  })
})