next.js/test/integration/app-dir-export/test/start.test.ts

/* eslint-env jest */

import { join } from 'path'
import fs from 'fs-extra'
import {
  check,
  File,
  findPort,
  killApp,
  nextBuild,
  nextStart,
} from 'next-test-utils'

const appDir = join(__dirname, '..')
const distDir = join(appDir, '.next')
const exportDir = join(appDir, 'out')
const nextConfig = new File(join(appDir, 'next.config.js'))
let app

describe('app dir - with output export (next start)', () => {
  ;(process.env.TURBOPACK_DEV ? describe.skip : describe)(
    'production mode',
    () => {
      afterEach(async () => {
        await killApp(app)
        nextConfig.restore()
        await fs.remove(distDir)
        await fs.remove(exportDir)
      })

      it('should error during next start with output export', async () => {
        const { code } = await nextBuild(appDir)
        expect(code).toBe(0)
        const port = await findPort()
        let stderr = ''
        app = await nextStart(appDir, port, {
          onStderr(msg: string) {
            stderr += msg || ''
          },
        })
        await check(() => stderr, /error/i)
        expect(stderr).toContain(
          '"next start" does not work with "output: export" configuration. Use "npx serve@latest out" instead.'
        )
      })

      // TODO: Move this test to test/production to run in isolation.
      ;(process.env.TURBOPACK_BUILD ? it.skip : it)(
        'should warn during next start with output standalone',
        async () => {
          nextConfig.replace(`output: 'export'`, `output: 'standalone'`)
          const { code } = await nextBuild(appDir)
          // eslint-disable-next-line jest/no-standalone-expect
          expect(code).toBe(0)
          const port = await findPort()
          let stderr = ''
          app = await nextStart(appDir, port, {
            onStderr(msg: string) {
              stderr += msg || ''
            },
          })
          await check(() => stderr, /⚠/i)
          // eslint-disable-next-line jest/no-standalone-expect
          expect(stderr).toContain(
            `"next start" does not work with "output: standalone" configuration. Use "node .next/standalone/server.js" instead.`
          )
        }
      )
    }
  )
})