text: /* eslint-env jest */
  
  import { join } from 'path'
  import { renderViaHTTP, findPort, launchApp, killApp } from 'next-test-utils'
  
  const context = {
    output: '',
  }
  
  const collectOutput = (message) => {
    context.output += message
  }
  
  describe('Document and App', () => {
    beforeAll(async () => {
      context.appPort = await findPort()
      context.server = await launchApp(join(__dirname, '../'), context.appPort, {
        onStdout: collectOutput,
        onStderr: collectOutput,
      })
  
      // pre-build all pages at the start
      await Promise.all([renderViaHTTP(context.appPort, '/')])
    })
    afterAll(() => killApp(context.server))
  
    it('should not have any missing key warnings', async () => {
      const html = await renderViaHTTP(context.appPort, '/')
      expect(html).toMatch(/<div>Hello World!!!<\/div>/)
    })
  })
  