Function checkFileWrite

test/production/clean-distdir/index.test.ts:19–34

(existsAfterBuild: boolean)

  })

  async function checkFileWrite(existsAfterBuild: boolean) {
    await next.build()

    const customFile = '.next/extra-file.txt'
    await next.patchFile(customFile, 'this is a testing file')

    await next.build()

    expect(await next.hasFile(customFile)).toBe(existsAfterBuild)

    // `.next/cache` should be preserved in all cases
    expect(await next.hasFile('.next/cache')).toBe(true)
    if (!isTurbopack) {
      expect(await next.hasFile('.next/cache/swc')).toBe(true)
    }
  }

  describe('disabled write', () => {
    it('should clean up .next before build start', async () => {