Function runTests

test/integration/404-page/test/index.test.ts:29–76

(mode = 'server')

  (await fetchViaHTTP(port, pathname)).headers.get('Cache-Control')

const runTests = (mode = 'server') => {
  it('should use pages/404', async () => {
    const html = await renderViaHTTP(appPort, '/abc')
    expect(html).toContain('custom 404 page')
  })

  it('should set correct status code with pages/404', async () => {
    const res = await fetchViaHTTP(appPort, '/abc')
    expect(res.status).toBe(404)
  })

  it('should use pages/404 for .d.ts file', async () => {
    const html = await renderViaHTTP(appPort, '/invalidExtension')
    expect(html).toContain('custom 404 page')
  })

  it('should not error when visited directly', async () => {
    const res = await fetchViaHTTP(appPort, '/404')
    expect(res.status).toBe(404)
    expect(await res.text()).toContain('custom 404 page')
  })

  it('should render _error for a 500 error still', async () => {
    const html = await renderViaHTTP(appPort, '/err')
    expect(html).not.toContain('custom 404 page')
    expect(html).toContain(mode === 'dev' ? 'oops' : 'Internal Server Error')
  })

  if (mode !== 'dev') {
    it('should output 404.html during build', async () => {
      const page = getPageFileFromPagesManifest(appDir, '/404')
      expect(page.endsWith('.html')).toBe(true)
    })

    it('should still output 404.js anyway', async () => {
      expect(
        await fs.pathExists(join(appDir, '.next/server/pages/404.js'))
      ).toBeTrue()
    })

    it('should add /404 to pages-manifest correctly', async () => {
      const manifest = await fs.readJSON(
        join(appDir, '.next', mode, 'pages-manifest.json')
      )
      expect('/404' in manifest).toBe(true)
    })
  }
}

describe('404 Page Support', () => {
  ;(process.env.TURBOPACK_BUILD ? describe.skip : describe)(