Function runTests

test/production/prerender-prefetch/index.test.ts:17–294

({
    optimisticClientCache,
  }: {
    optimisticClientCache?: boolean
  })

  let next: NextInstance

  const runTests = ({
    optimisticClientCache,
  }: {
    optimisticClientCache?: boolean
  }) => {
    it('should not revalidate during prefetching', async () => {
      const cliOutputStart = next.cliOutput.length

      for (let i = 0; i < 3; i++) {
        for (const path of ['/blog/first', '/blog/second']) {
          const res = await fetchViaHTTP(
            next.url,
            `/_next/data/${next.buildId}${path}.json`,
            undefined,
            {
              headers: {
                purpose: 'prefetch',
              },
            }
          )
          expect(res.status).toBe(200)
        }
        // do requests three times with 1 second between
        // to go over revalidate period
        await waitFor(1000)
      }
      expect(next.cliOutput.substring(cliOutputStart)).not.toContain(
        'revalidating /blog'
      )
    })

    it('should trigger revalidation after navigation', async () => {
      const getData = () =>
        fetchViaHTTP(
          next.url,
          `/_next/data/${next.buildId}/blog/first.json`,
          undefined,
          {
            headers: {
              purpose: 'prefetch',
            },
          }
        )
      const initialDataRes = await getData()
      const initialData = await initialDataRes.json()
      const browser = await webdriver(next.url, '/')

      await browser.elementByCss('#to-blog-first').click()

      await check(async () => {
        const data = await getData()
        assert.notDeepEqual(initialData, data)
        return 'success'
      }, 'success')
    })

    it('should update cache using prefetch with unstable_skipClientCache', async () => {
      const browser = await webdriver(next.url, '/')