next.js/test/e2e/app-dir/app/index.test.ts

import { nextTestSetup } from 'e2e-utils'
import { check, retry, waitFor } from 'next-test-utils'
import cheerio from 'cheerio'
import stripAnsi from 'strip-ansi'
import {
  NEXT_RSC_UNION_QUERY,
  RSC_HEADER,
} from 'next/dist/client/components/app-router-headers'

// TODO: We should decide on an established pattern for gating test assertions
// on experimental flags. For example, as a first step we could all the common
// gates like this one into a single module.
const isPPREnabledByDefault = process.env.__NEXT_EXPERIMENTAL_PPR === 'true'

describe('app dir - basic', () => {
  const { next, isNextDev, isNextStart, isNextDeploy, isTurbopack } =
    nextTestSetup({
      files: __dirname,
      buildCommand: process.env.NEXT_EXPERIMENTAL_COMPILE
        ? 'pnpm compile-mode'
        : undefined,
      packageJson: {
        scripts: {
          'compile-mode': process.env.NEXT_EXPERIMENTAL_COMPILE
            ? `next build --experimental-build-mode=compile && next build --experimental-build-mode=generate-env`
            : undefined,
        },
      },
      dependencies: {
        nanoid: '4.0.1',
      },
      env: {
        NEXT_PUBLIC_TEST_ID: Date.now() + '',
      },
    })

  if (isNextStart) {
    it('should have correct cache-control for SSR routes', async () => {
      for (const path of ['/catch-all/first', '/ssr']) {
        const res = await next.fetch(path)
        expect(res.status).toBe(200)
        expect(res.headers.get('Cache-Control')).toBe(
          'private, no-cache, no-store, max-age=0, must-revalidate'
        )
      }
    })
  }

  if (process.env.NEXT_EXPERIMENTAL_COMPILE) {
    it('should provide query for getStaticProps page correctly', async () => {
      const res = await next.fetch('/ssg?hello=world')
      expect(res.status).toBe(200)

      const $ = cheerio.load(await res.text())
      expect(JSON.parse($('#query').text())).toEqual({ hello: 'world' })
    })
  }

  if (isNextStart) {
    it('should contain framework.json', async () => {
      const frameworksJson = await next.readJSON(
        '.next/diagnostics/framework.json'
      )
      expect(frameworksJson).toEqual({
        name: 'Next.js',
        version: require('next/package.json').version,
      })
    })

    it('outputs correct build-diagnostics.json', async () => {
      const buildDiagnosticsJson = await next.readJSON(
        '.next/diagnostics/build-diagnostics.json'
      )
      expect(buildDiagnosticsJson).toMatchObject({
        buildStage: 'static-generation',
        buildOptions: {},
      })
    })
  }

  if (isNextStart && !process.env.NEXT_EXPERIMENTAL_COMPILE) {
    if (!process.env.NEXT_EXPERIMENTAL_COMPILE) {
      it('should have correct size in build output', async () => {
        expect(next.cliOutput).toMatch(
          /\/dashboard\/another.*? *?[^0]\d{1,} [\w]{1,}B/
        )
      })
    }

    it('should have correct preferredRegion values in manifest', async () => {
      const middlewareManifest = JSON.parse(
        await next.readFile('.next/server/middleware-manifest.json')
      )
      expect(
        middlewareManifest.functions['/(rootonly)/dashboard/hello/page'].regions
      ).toEqual(['iad1', 'sfo1'])
      expect(middlewareManifest.functions['/dashboard/page'].regions).toEqual([
        'iad1',
      ])
      expect(
        middlewareManifest.functions['/slow-page-no-loading/page'].regions
      ).toEqual(['global'])

      expect(middlewareManifest.functions['/test-page/page'].regions).toEqual([
        'home',
      ])

      // Inherits from the root layout.
      expect(
        middlewareManifest.functions['/slow-page-with-loading/page'].regions
      ).toEqual(['sfo1'])
    })
  }

  it('should work for catch-all edge page', async () => {
    const html = await next.render('/catch-all-edge/hello123')
    const $ = cheerio.load(html)

    expect(JSON.parse($('#params').text())).toEqual({
      slug: ['hello123'],
    })
  })

  it('should return normalized dynamic route params for catch-all edge page', async () => {
    const html = await next.render('/catch-all-edge/a/b/c')
    const $ = cheerio.load(html)

    expect(JSON.parse($('#params').text())).toEqual({
      slug: ['a', 'b', 'c'],
    })
  })

  it('should have correct searchParams and params (server)', async () => {
    const html = await next.render('/dynamic/category-1/id-2?query1=value2')
    const $ = cheerio.load(html)

    expect(JSON.parse($('#id-page-params').text())).toEqual({
      category: 'category-1',
      id: 'id-2',
    })
    expect(JSON.parse($('#search-params').text())).toEqual({
      query1: 'value2',
    })
  })

  it('should have correct searchParams and params (client)', async () => {
    const browser = await next.browser(
      '/dynamic-client/category-1/id-2?query1=value2'
    )
    const html = await browser.eval('document.documentElement.innerHTML')
    const $ = cheerio.load(html)

    expect(JSON.parse($('#id-page-params').text())).toEqual({
      category: 'category-1',
      id: 'id-2',
    })
    expect(JSON.parse($('#search-params').text())).toEqual({
      query1: 'value2',
    })
  })

  if (!isNextDev) {
    it('should successfully detect app route during prefetch', async () => {
      const browser = await next.browser('/')

      await check(async () => {
        const found = await browser.eval(
          '!!window.next.router.components["/dashboard"]'
        )
        return found
          ? 'success'
          : await browser.eval('Object.keys(window.next.router.components)')
      }, 'success')

      await browser.elementByCss('a').click()
      await browser.waitForElementByCss('#from-dashboard')
    })
  }

  // Turbopack has different chunking in dev/production which results in the entrypoint name not being included in the outputs.
  if (!process.env.IS_TURBOPACK_TEST) {
    it('should encode chunk path correctly', async () => {
      await next.fetch('/dynamic-client/first/second')
      const browser = await next.browser('/')
      const requests = []
      browser.on('request', (req) => {
        requests.push(req.url())
      })

      await browser.eval(
        'window.location.href = "/dynamic-client/first/second"'
      )

      await browser.waitForElementByCss('#id-page-params')

      expect(
        requests.some(
          (req) =>
            req.includes(
              encodeURI(isTurbopack ? '[category]_[id]' : '/[category]/[id]')
            ) && req.includes('.js')
        )
      ).toBe(true)
    })
  }

  it.each([
    { pathname: '/redirect-1' },
    { pathname: '/redirect-2' },
    { pathname: '/blog/old-post' },
    { pathname: '/redirect-3/some' },
    { pathname: '/redirect-4' },
    { pathname: '/redirect-4/?q=1&=' },
  ])(
    'should match redirects in pages correctly $path',
    async ({ pathname }) => {
      let browser = await next.browser('/')

      await browser.eval(`next.router.push("${pathname}")`)
      await check(async () => {
        const href = await browser.eval('location.href')
        return href.includes('example.vercel.sh') ? 'yes' : href
      }, 'yes')

      if (pathname.includes('/blog')) {
        browser = await next.browser('/blog/first')
        await browser.eval('window.beforeNav = 1')

        // check 5 times to ensure a reload didn't occur
        for (let i = 0; i < 5; i++) {
          await waitFor(500)
          expect(
            await browser.eval('document.documentElement.innerHTML')
          ).toContain('hello from pages/blog/[slug]')
          expect(await browser.eval('window.beforeNav')).toBe(1)
        }
      }
    }
  )

  it('should not apply client router filter on shallow', async () => {
    const browser = await next.browser('/')
    await browser.eval('window.beforeNav = 1')

    await check(async () => {
      await browser.eval(
        `window.next.router.push('/', '/redirect-1', { shallow: true })`
      )
      return await browser.eval('window.location.pathname')
    }, '/redirect-1')
    expect(await browser.eval('window.beforeNav')).toBe(1)
  })

  if (isNextDev) {
    it('should not have duplicate config warnings', async () => {
      await next.fetch('/')
      expect(
        stripAnsi(next.cliOutput).match(/Experiments \(use with caution\):/g)
          .length
      ).toBe(1)
    })
  }

  if (!isNextDeploy) {
    it('should not share edge workers', async () => {
      const controller1 = new AbortController()
      const controller2 = new AbortController()
      next
        .fetch('/slow-page-no-loading', {
          signal: controller1.signal,
        })
        .catch(() => {})
      next
        .fetch('/slow-page-no-loading', {
          signal: controller2.signal,
        })
        .catch(() => {})

      await waitFor(1000)
      controller1.abort()

      const controller3 = new AbortController()
      next
        .fetch('/slow-page-no-loading', {
          signal: controller3.signal,
        })
        .catch(() => {})
      await waitFor(1000)
      controller2.abort()
      controller3.abort()

      const res = await next.fetch('/slow-page-no-loading')
      expect(res.status).toBe(200)
      expect(await res.text()).toContain('hello from slow page')
      expect(next.cliOutput).not.toContain(
        'A separate worker must be used for each render'
      )
    })
  }

  if (isNextStart) {
    it('should generate build traces correctly', async () => {
      const trace = JSON.parse(
        await next.readFile(
          '.next/server/app/dashboard/deployments/[id]/page.js.nft.json'
        )
      ) as { files: string[] }
      expect(trace.files.some((file) => file.endsWith('data.json'))).toBe(true)
    })
  }

  it('should use text/x-component for flight', async () => {
    const res = await next.fetch(
      `/dashboard/deployments/123?${NEXT_RSC_UNION_QUERY}`,
      {
        headers: {
          [RSC_HEADER]: '1',
        },
      }
    )
    expect(res.headers.get('Content-Type')).toBe('text/x-component')
  })

  it('should use text/x-component for flight with edge runtime', async () => {
    const res = await next.fetch(`/dashboard?${NEXT_RSC_UNION_QUERY}`, {
      headers: {
        [RSC_HEADER]: '1',
      },
    })
    expect(res.headers.get('Content-Type')).toBe('text/x-component')
  })

  it('should return the `vary` header from edge runtime', async () => {
    const res = await next.fetch('/dashboard')
    expect(res.headers.get('x-edge-runtime')).toBe('1')
    expect(res.headers.get('vary')).toBe(
      'RSC, Next-Router-State-Tree, Next-Router-Prefetch, Next-Router-Segment-Prefetch'
    )
  })

  it('should return the `vary` header from pages for flight requests', async () => {
    const res = await next.fetch(`/?${NEXT_RSC_UNION_QUERY}`, {
      headers: {
        [RSC_HEADER]: '1',
      },
    })
    expect(res.headers.get('vary')).toBe(
      isNextDeploy
        ? 'RSC, Next-Router-State-Tree, Next-Router-Prefetch, Next-Router-Segment-Prefetch'
        : 'RSC, Next-Router-State-Tree, Next-Router-Prefetch, Next-Router-Segment-Prefetch, Accept-Encoding'
    )
  })

  it('should pass props from getServerSideProps in root layout', async () => {
    const $ = await next.render$('/dashboard')
    expect($('title').first().text()).toBe('hello world')
  })

  it('should serve from pages', async () => {
    const html = await next.render('/')
    expect(html).toContain('hello from pages/index')
  })

  it('should serve dynamic route from pages', async () => {
    const html = await next.render('/blog/first')
    expect(html).toContain('hello from pages/blog/[slug]')
  })

  it('should serve from public', async () => {
    const html = await next.render('/hello.txt')
    expect(html).toContain('hello world')
  })

  it('should serve from app', async () => {
    const html = await next.render('/dashboard')
    expect(html).toContain('hello from app/dashboard')
  })

  it('should ensure the </body></html> suffix is at the end of the stream', async () => {
    const html = await next.render('/dashboard')

    // It must end with the suffix and not contain it anywhere else.
    const suffix = '</body></html>'
    expect(html).toEndWith(suffix)
    expect(html.slice(0, -suffix.length)).not.toContain(suffix)
  })

  if (!isNextDeploy) {
    it('should serve /index as separate page', async () => {
      const stderr = []
      next.on('stderr', (err) => {
        stderr.push(err)
      })
      const html = await next.render('/dashboard/index')
      expect(html).toContain('hello from app/dashboard/index')
      expect(stderr.some((err) => err.includes('Invalid hook call'))).toBe(
        false
      )
    })

    it('should serve polyfills for browsers that do not support modules', async () => {
      const html = await next.render('/dashboard/index')
      expect(html).toMatch(
        isTurbopack
          ? /<script src="\/_next\/static\/chunks\/([\w-]*polyfill-nomodule|[0-9a-f]+)\.js" noModule="">/
          : /<script src="\/_next\/static\/chunks\/polyfills(-\w+)?\.js" noModule="">/
      )
    })
  }

  // TODO-APP: handle css modules fouc in dev
  it.skip('should handle css imports in next/dynamic correctly', async () => {
    const browser = await next.browser('/dashboard/index')

    expect(
      await browser.eval(
        `window.getComputedStyle(document.querySelector('#css-text-dynamic-server')).color`
      )
    ).toBe('rgb(0, 0, 255)')
    expect(
      await browser.eval(
        `window.getComputedStyle(document.querySelector('#css-text-lazy')).color`
      )
    ).toBe('rgb(128, 0, 128)')
  })

  it('should include layouts when no direct parent layout', async () => {
    const $ = await next.render$('/dashboard/integrations')
    // Should not be nested in dashboard
    expect($('h1').text()).toBe('Dashboard')
    // Should include the page text
    expect($('p').text()).toBe('hello from app/dashboard/integrations')
  })

  // TODO-APP: handle new root layout
  it.skip('should not include parent when not in parent directory with route in directory', async () => {
    const $ = await next.render$('/dashboard/hello')
    const html = $.html()

    // new root has to provide it's own custom root layout or the default
    // is used instead
    expect(html).toContain('<html')
    expect(html).toContain('<body')
    expect($('html').hasClass('this-is-the-document-html')).toBeFalsy()
    expect($('body').hasClass('this-is-the-document-body')).toBeFalsy()

    // Should not be nested in dashboard
    expect($('h1').text()).toBeFalsy()

    // Should render the page text
    expect($('p').text()).toBe('hello from app/dashboard/rootonly/hello')
  })

  it('should use new root layout when provided', async () => {
    const $ = await next.render$('/dashboard/another')

    // new root has to provide it's own custom root layout or the default
    // is used instead
    expect($('html').hasClass('this-is-another-document-html')).toBeTruthy()
    expect($('body').hasClass('this-is-another-document-body')).toBeTruthy()

    // Should not be nested in dashboard
    expect($('h1').text()).toBeFalsy()

    // Should render the page text
    expect($('p').text()).toBe('hello from newroot/dashboard/another')
  })

  it('should not create new root layout when nested (optional)', async () => {
    const $ = await next.render$('/dashboard/deployments/breakdown')

    // new root has to provide it's own custom root layout or the default
    // is used instead
    expect($('html').hasClass('this-is-the-document-html')).toBeTruthy()
    expect($('body').hasClass('this-is-the-document-body')).toBeTruthy()

    // Should be nested in dashboard
    expect($('h1').text()).toBe('Dashboard')
    expect($('h2').text()).toBe('Custom dashboard')

    // Should render the page text
    expect($('p').text()).toBe(
      'hello from app/dashboard/(custom)/deployments/breakdown'
    )
  })

  it('should include parent document when no direct parent layout', async () => {
    const $ = await next.render$('/dashboard/integrations')

    expect($('html').hasClass('this-is-the-document-html')).toBeTruthy()
    expect($('body').hasClass('this-is-the-document-body')).toBeTruthy()
  })

  it('should not include parent when not in parent directory', async () => {
    const $ = await next.render$('/dashboard/changelog')
    // Should not be nested in dashboard
    expect($('h1').text()).toBeFalsy()
    // Should include the page text
    expect($('p').text()).toBe('hello from app/dashboard/changelog')
  })

  it('should serve nested parent', async () => {
    const $ = await next.render$('/dashboard/deployments/123')
    // Should be nested in dashboard
    expect($('h1').text()).toBe('Dashboard')
    // Should be nested in deployments
    expect($('h2').text()).toBe('Deployments hello')
  })

  it('should serve dynamic parameter', async () => {
    const $ = await next.render$('/dashboard/deployments/123')
    // Should include the page text with the parameter
    expect($('p').text()).toBe(
      'hello from app/dashboard/deployments/[id]. ID is: 123'
    )
  })

  // TODO-APP: fix to ensure behavior matches on deploy
  if (!isNextDeploy) {
    it('should serve page as a segment name correctly', async () => {
      const html = await next.render('/dashboard/page')
      expect(html).toContain('hello dashboard/page!')
    })
  }

  it('should include document html and body', async () => {
    const $ = await next.render$('/dashboard')

    expect($('html').hasClass('this-is-the-document-html')).toBeTruthy()
    expect($('body').hasClass('this-is-the-document-body')).toBeTruthy()
  })

  it('should not serve when layout is provided but no folder index', async () => {
    const res = await next.fetch('/dashboard/deployments')
    expect(res.status).toBe(404)
    expect(await res.text()).toContain('This page could not be found')
  })

  // TODO-APP: do we want to make this only work for /root or is it allowed
  // to work for /pages as well?
  it.skip('should match partial parameters', async () => {
    const html = await next.render('/partial-match-123')
    expect(html).toContain('hello from app/partial-match-[id]. ID is: 123')
  })

  describe('rewrites', () => {
    // TODO-APP: rewrite url is broken
    it('should support rewrites on initial load', async () => {
      const browser = await next.browser('/rewritten-to-dashboard')
      expect(await browser.elementByCss('h1').text()).toBe('Dashboard')
      expect(await browser.url()).toBe(`${next.url}/rewritten-to-dashboard`)
    })

    it('should support rewrites on client-side navigation from pages to app with existing pages path', async () => {
      await next.fetch('/exists-but-not-routed')
      const browser = await next.browser('/link-to-rewritten-path')

      try {
        // Click the link.
        await check(async () => {
          await browser.elementById('link-to-rewritten-path').click()
          await browser.waitForElementByCss('#from-dashboard', 5000)

          // Check to see that we were rewritten and not redirected.
          // TODO-APP: rewrite url is broken
          // expect(await browser.url()).toBe(`${next.url}/rewritten-to-dashboard`)

          // Check to see that the page we navigated to is in fact the dashboard.
          expect(await browser.elementByCss('#from-dashboard').text()).toBe(
            'hello from app/dashboard'
          )
          return 'success'
        }, 'success')
      } finally {
        await browser.close()
      }
    })

    it('should support rewrites on client-side navigation', async () => {
      const browser = await next.browser('/rewrites')

      try {
        // Click the link.
        await browser.elementById('link').click()
        await browser.waitForElementByCss('#from-dashboard')

        // Check to see that we were rewritten and not redirected.
        expect(await browser.url()).toBe(`${next.url}/rewritten-to-dashboard`)

        // Check to see that the page we navigated to is in fact the dashboard.
        expect(await browser.elementByCss('#from-dashboard').text()).toBe(
          'hello from app/dashboard'
        )
      } finally {
        await browser.close()
      }
    })
  })

  // TODO-APP: Enable in development
  ;(isNextDev ||
    // When PPR is enabled, the shared layouts re-render because we prefetch
    // from the root. This will be addressed before GA.
    isPPREnabledByDefault
    ? it.skip
    : it)(
    'should not rerender layout when navigating between routes in the same layout',
    async () => {
      const browser = await next.browser('/same-layout/first')

      try {
        // Get the render id from the dom and click the first link.
        const firstRenderID = await browser.elementById('render-id').text()
        await browser.elementById('link').click()
        await browser.waitForElementByCss('#second-page')

        // Get the render id from the dom again, it should be the same!
        const secondRenderID = await browser.elementById('render-id').text()
        expect(secondRenderID).toBe(firstRenderID)

        // Navigate back to the first page again by clicking the link.
        await browser.elementById('link').click()
        await browser.waitForElementByCss('#first-page')

        // Get the render id from the dom again, it should be the same!
        const thirdRenderID = await browser.elementById('render-id').text()
        expect(thirdRenderID).toBe(firstRenderID)
      } finally {
        await browser.close()
      }
    }
  )

  it('should handle hash in initial url', async () => {
    const browser = await next.browser('/dashboard#abc')

    try {
      // Check if hash is preserved
      expect(await browser.eval('window.location.hash')).toBe('#abc')
      await waitFor(1000)
      // Check again to be sure as it might be timed different
      expect(await browser.eval('window.location.hash')).toBe('#abc')
    } finally {
      await browser.close()
    }
  })

  describe('<Link />', () => {
    it('should hard push', async () => {
      const browser = await next.browser('/link-hard-push/123')

      try {
        // Click the link on the page, and verify that the history entry was
        // added.
        expect(await browser.eval('window.history.length')).toBe(2)
        await browser.elementById('link').click()
        await browser.waitForElementByCss('#render-id-456')
        expect(await browser.eval('window.history.length')).toBe(3)

        // Go back, and redo the navigation by clicking the link.
        await browser.back()
        await browser.elementById('link').click()
        await browser.waitForElementByCss('#render-id-456')
      } finally {
        await browser.close()
      }
    })

    it('should hard replace', async () => {
      const browser = await next.browser('/link-hard-replace/123')

      try {
        // Click the link on the page, and verify that the history entry was NOT
        // added.
        expect(await browser.eval('window.history.length')).toBe(2)
        await browser.elementById('link').click()
        await browser.waitForElementByCss('#render-id-456')
        expect(await browser.eval('window.history.length')).toBe(2)

        // Navigate to the subpage, verify that the history entry was NOT added.
        await browser.elementById('link').click()
        await browser.waitForElementByCss('#render-id-123')
        expect(await browser.eval('window.history.length')).toBe(2)

        // Navigate back again, verify that the history entry was NOT added.
        await browser.elementById('link').click()
        await browser.waitForElementByCss('#render-id-456')
        expect(await browser.eval('window.history.length')).toBe(2)
      } finally {
        await browser.close()
      }
    })

    it('should soft push', async () => {
      const browser = await next.browser('/link-soft-push')

      // set a flag once the page loads so we can track if a hard nav occurred (which would reset the flag)
      await browser.eval('window.__nextSoftPushTest = 1')

      try {
        // Click the link on the page, and verify that the history entry was
        // added.
        expect(await browser.eval('window.history.length')).toBe(2)
        await browser.elementById('link').click()
        await browser.waitForElementByCss('#render-id')
        expect(await browser.eval('window.history.length')).toBe(3)

        // Get the id on the rendered page.
        const firstID = await browser.elementById('render-id').text()

        // Go back, and redo the navigation by clicking the link.
        await browser.back()
        await browser.elementById('link').click()

        // Get the ID again, and compare, they should be the same.
        const secondID = await browser.elementById('render-id').text()

        // router cache should have invalidated the page content, so the IDs should be different
        expect(firstID).not.toBe(secondID)

        // verify that the flag is still set
        expect(await browser.eval('window.__nextSoftPushTest')).toBe(1)
      } finally {
        await browser.close()
      }
    })

    it('should soft replace', async () => {
      const browser = await next.browser('/link-soft-replace')

      // set a flag once the page loads so we can track if a hard nav occurred (which would reset the flag)
      await browser.eval('window.__nextSoftPushTest = 1')

      try {
        // Get the render ID so we can compare it.
        const firstID = await browser.elementById('render-id').text()

        // Click the link on the page, and verify that the history entry was NOT
        // added.
        expect(await browser.eval('window.history.length')).toBe(2)
        await browser.elementById('self-link').click()

        await retry(async () => {
          // Get the id on the rendered page.
          const secondID = await browser.elementById('render-id').text()
          expect(secondID).not.toBe(firstID)

          expect(await browser.eval('window.history.length')).toBe(2)
        })

        // Navigate to the subpage, verify that the history entry was NOT added.
        await browser.elementById('subpage-link').click()
        await browser.waitForElementByCss('#back-link')
        expect(await browser.eval('window.history.length')).toBe(2)

        // Navigate back again, verify that the history entry was NOT added.
        await browser.elementById('back-link').click()
        await browser.waitForElementByCss('#render-id')
        expect(await browser.eval('window.history.length')).toBe(2)

        await retry(async () => {
          // Get the ID again, and compare, they should be the same.
          const thirdID = await browser.elementById('render-id').text()
          expect(thirdID).not.toBe(firstID)
        })

        // verify that the flag is still set
        expect(await browser.eval('window.__nextSoftPushTest')).toBe(1)
      } finally {
        await browser.close()
      }
    })

    it('should be soft for back navigation', async () => {
      const browser = await next.browser('/with-id')

      try {
        // Get the id on the rendered page.
        const firstID = await browser.elementById('render-id').text()

        // Click the link, and go back.
        await browser.elementById('link').click()
        await browser.waitForElementByCss('#from-navigation')
        await browser.back()

        // Get the date again, and compare, they should be the same.
        const secondID = await browser.elementById('render-id').text()
        expect(firstID).toBe(secondID)
      } finally {
        await browser.close()
      }
    })

    it('should be soft for forward navigation', async () => {
      const browser = await next.browser('/with-id')

      try {
        // Click the link.
        await browser.elementById('link').click()
        await browser.waitForElementByCss('#from-navigation')

        // Get the id on the rendered page.
        const firstID = await browser.elementById('render-id').text()

        // Go back, then forward.
        await browser.back()
        await browser.forward()

        // Get the date again, and compare, they should be the same.
        const secondID = await browser.elementById('render-id').text()
        expect(firstID).toBe(secondID)
      } finally {
        await browser.close()
      }
    })

    it('should allow linking from app page to pages page', async () => {
      const browser = await next.browser('/pages-linking')

      try {
        // Click the link.
        await browser.elementById('app-link').click()
        expect(await browser.waitForElementByCss('#pages-link').text()).toBe(
          'To App Page'
        )

        // Click the other link.
        await browser.elementById('pages-link').click()
        expect(await browser.waitForElementByCss('#app-link').text()).toBe(
          'To Pages Page'
        )
      } finally {
        await browser.close()
      }
    })

    it('should navigate to pages dynamic route from pages page if it overlaps with an app page', async () => {
      await next.fetch('/dynamic-pages-route-app-overlap/app-dir')
      const browser = await next.browser('/dynamic-pages-route-app-overlap')

      try {
        // Click the link.
        await check(async () => {
          await browser.elementById('pages-link').click()

          expect(
            await browser.waitForElementByCss('#app-text', 5000).text()
          ).toBe('hello from app/dynamic-pages-route-app-overlap/app-dir/page')

          // When refreshing the browser, the app page should be rendered
          await browser.refresh()
          expect(await browser.waitForElementByCss('#app-text').text()).toBe(
            'hello from app/dynamic-pages-route-app-overlap/app-dir/page'
          )
          return 'success'
        }, 'success')
      } finally {
        await browser.close()
      }
    })

    it('should push to external url', async () => {
      const browser = await next.browser('/link-external/push')
      expect(await browser.eval('window.history.length')).toBe(2)
      await browser.elementByCss('#external-link').click()
      expect(await browser.waitForElementByCss('h1').text()).toBe(
        'Example Domain'
      )
      expect(await browser.eval('window.history.length')).toBe(3)
    })

    it('should replace to external url', async () => {
      const browser = await next.browser('/link-external/replace')
      expect(await browser.eval('window.history.length')).toBe(2)
      await browser.elementByCss('#external-link').click()
      expect(await browser.waitForElementByCss('h1').text()).toBe(
        'Example Domain'
      )
      expect(await browser.eval('window.history.length')).toBe(2)
    })
  })

  describe('server components', () => {
    // TODO-APP: why is this not servable but /dashboard+rootonly/hello.server.js
    // should be? Seems like they both either should be servable or not
    it('should not serve .server.js as a path', async () => {
      // Without .server.js should serve
      const html = await next.render('/should-not-serve-server')
      expect(html).toContain('hello from app/should-not-serve-server')

      // Should not serve `.server`
      const res = await next.fetch('/should-not-serve-server.server')
      expect(res.status).toBe(404)
      expect(await res.text()).toContain('This page could not be found')

      // Should not serve `.server.js`
      const res2 = await next.fetch('/should-not-serve-server.server.js')
      expect(res2.status).toBe(404)
      expect(await res2.text()).toContain('This page could not be found')
    })

    it('should not serve .client.js as a path', async () => {
      // Without .client.js should serve
      const html = await next.render('/should-not-serve-client')
      expect(html).toContain('hello from app/should-not-serve-client')

      // Should not serve `.client`
      const res = await next.fetch('/should-not-serve-client.client')
      expect(res.status).toBe(404)
      expect(await res.text()).toContain('This page could not be found')

      // Should not serve `.client.js`
      const res2 = await next.fetch('/should-not-serve-client.client.js')
      expect(res2.status).toBe(404)
      expect(await res2.text()).toContain('This page could not be found')
    })

    it('should serve shared component', async () => {
      // Without .client.js should serve
      const html = await next.render('/shared-component-route')
      expect(html).toContain('hello from app/shared-component-route')
    })

    describe('dynamic routes', () => {
      it('should only pass params that apply to the layout', async () => {
        const $ = await next.render$('/dynamic/books/hello-world')

        expect($('#dynamic-layout-params').text()).toBe('{}')
        expect($('#category-layout-params').text()).toBe('{"category":"books"}')
        expect($('#id-layout-params').text()).toBe(
          '{"category":"books","id":"hello-world"}'
        )
        expect($('#id-page-params').text()).toBe(
          '{"category":"books","id":"hello-world"}'
        )
      })
    })

    describe('catch-all routes', () => {
      it('should handle optional segments', async () => {
        const params = ['this', 'is', 'a', 'test']
        const route = params.join('/')
        const $ = await next.render$(`/catch-all-optional/${route}`)
        expect($('#text').attr('data-params')).toBe(route)
      })

      it('should handle optional segments root', async () => {
        const $ = await next.render$(`/catch-all-optional`)
        expect($('#text').attr('data-params')).toBe('')
      })

      it('should handle optional catch-all segments link', async () => {
        const browser = await next.browser('/catch-all-link')
        expect(
          await browser
            .elementByCss('#to-catch-all-optional')
            .click()
            .waitForElementByCss('#text')
            .text()
        ).toBe(`hello from /catch-all-optional/this/is/a/test`)
      })

      it('should handle required segments', async () => {
        const params = ['this', 'is', 'a', 'test']
        const route = params.join('/')
        const $ = await next.render$(`/catch-all/${route}`)
        expect($('#text').attr('data-params')).toBe(route)
        expect($('#not-a-page').text()).toBe('Not a page')

        // Components under catch-all should not be treated as route that errors during build.
        // They should be rendered properly when imported in page route.
        expect($('#widget').text()).toBe('widget')
      })

      it('should handle required segments root as not found', async () => {
        const res = await next.fetch(`/catch-all`)
        expect(res.status).toBe(404)
        expect(await res.text()).toContain('This page could not be found')
      })

      it('should handle catch-all segments link', async () => {
        const browser = await next.browser('/catch-all-link')
        expect(
          await browser
            .elementByCss('#to-catch-all')
            .click()
            .waitForElementByCss('#text')
            .text()
        ).toBe(`hello from /catch-all/this/is/a/test`)
      })
    })

    describe('should serve client component', () => {
      it('should serve server-side', async () => {
        const $ = await next.render$('/client-component-route')
        expect($('p').text()).toBe(
          'hello from app/client-component-route. count: 0'
        )
      })

      // TODO-APP: investigate hydration not kicking in on some runs
      it('should serve client-side', async () => {
        const browser = await next.browser('/client-component-route')

        // After hydration count should be 1
        expect(await browser.elementByCss('p').text()).toBe(
          'hello from app/client-component-route. count: 1'
        )
      })
    })

    describe('should include client component layout with server component route', () => {
      it('should include it server-side', async () => {
        const $ = await next.render$('/client-nested')
        // Should not be nested in dashboard
        expect($('h1').text()).toBe('Client Nested. Count: 0')
        // Should include the page text
        expect($('p').text()).toBe('hello from app/client-nested')
      })

      it('should include it client-side', async () => {
        const browser = await next.browser('/client-nested')

        // After hydration count should be 1
        expect(await browser.elementByCss('h1').text()).toBe(
          'Client Nested. Count: 1'
        )

        // After hydration count should be 1
        expect(await browser.elementByCss('p').text()).toBe(
          'hello from app/client-nested'
        )
      })
    })

    describe('Loading', () => {
      it('should render loading.js in initial html for slow page', async () => {
        const $ = await next.render$('/slow-page-with-loading')

        expect($('#loading').text()).toBe('Loading...')
      })

      it('should render loading.js in browser for slow page', async () => {
        const browser = await next.browser('/slow-page-with-loading', {
          waitHydration: false,
        })
        // TODO-APP: `await next.browser()` causes waiting for the full page to complete streaming. At that point "Loading..." is replaced by the actual content
        // expect(await browser.elementByCss('#loading').text()).toBe('Loading...')

        expect(await browser.elementByCss('#slow-page-message').text()).toBe(
          'hello from slow page'
        )
      })

      it('should render loading.js in initial html for slow layout', async () => {
        const $ = await next.render$('/slow-layout-with-loading/slow')

        expect($('#loading').text()).toBe('Loading...')
      })

      it('should render loading.js in browser for slow layout', async () => {
        const browser = await next.browser('/slow-layout-with-loading/slow', {
          waitHydration: false,
        })
        // TODO-APP: `await next.browser()` causes waiting for the full page to complete streaming. At that point "Loading..." is replaced by the actual content
        // expect(await browser.elementByCss('#loading').text()).toBe('Loading...')

        expect(await browser.elementByCss('#slow-layout-message').text()).toBe(
          'hello from slow layout'
        )

        expect(await browser.elementByCss('#page-message').text()).toBe(
          'Hello World'
        )
      })

      it('should render loading.js in initial html for slow layout and page', async () => {
        const $ = await next.render$('/slow-layout-and-page-with-loading/slow')

        expect($('#loading-layout').text()).toBe('Loading layout...')
        expect($('#loading-page').text()).toBe('Loading page...')
      })

      it('should render loading.js in browser for slow layout and page', async () => {
        const browser = await next.browser(
          '/slow-layout-and-page-with-loading/slow',
          {
            waitHydration: false,
          }
        )
        // TODO-APP: `await next.browser()` causes waiting for the full page to complete streaming. At that point "Loading..." is replaced by the actual content
        // expect(await browser.elementByCss('#loading-layout').text()).toBe('Loading...')
        // expect(await browser.elementByCss('#loading-page').text()).toBe('Loading...')

        expect(await browser.elementByCss('#slow-layout-message').text()).toBe(
          'hello from slow layout'
        )

        expect(await browser.elementByCss('#slow-page-message').text()).toBe(
          'hello from slow page'
        )
      })
    })

    describe('middleware', () => {
      it.each(['rewrite', 'redirect'])(
        `should strip internal query parameters from requests to middleware for %s`,
        async (method) => {
          const browser = await next.browser('/internal')

          // Wait for and click the navigation element, this should trigger
          // the flight request that'll be caught by the middleware. If the
          // middleware sees any flight data on the request it'll redirect to
          // a page with an element of #failure, otherwise, we'll see the
          // element for #success.
          await browser
            .waitForElementByCss(`#navigate-${method}`)
            .elementById(`navigate-${method}`)
            .click()
          await check(
            async () => await browser.elementByCss('#success').text(),
            /Success/
          )
        }
      )
    })

    describe('next/router', () => {
      it('should support router.back and router.forward', async () => {
        const browser = await next.browser('/back-forward/1')

        const firstMessage = 'Hello from 1'
        const secondMessage = 'Hello from 2'

        expect(await browser.elementByCss('#message-1').text()).toBe(
          firstMessage
        )

        try {
          const message2 = await browser
            .waitForElementByCss('#to-other-page')
            .click()
            .waitForElementByCss('#message-2')
            .text()
          expect(message2).toBe(secondMessage)

          const message1 = await browser
            .waitForElementByCss('#back-button')
            .click()
            .waitForElementByCss('#message-1')
            .text()
          expect(message1).toBe(firstMessage)

          const message2Again = await browser
            .waitForElementByCss('#forward-button')
            .click()
            .waitForElementByCss('#message-2')
            .text()
          expect(message2Again).toBe(secondMessage)
        } finally {
          await browser.close()
        }
      })
    })

    describe('client components', () => {
      if (!isNextDeploy) {
        it('should have consistent query and params handling', async () => {
          const $ = await next.render$('/param-and-query/params?slug=query')
          const el = $('#params-and-query')
          expect(el.attr('data-params')).toBe('params')
          expect(el.attr('data-query')).toBe('query')
        })
      }
    })
  })

  if (isNextDev) {
    describe('HMR', () => {
      it('should HMR correctly for server component', async () => {
        const filePath = 'app/dashboard/index/page.js'
        const origContent = await next.readFile(filePath)

        try {
          const browser = await next.browser('/dashboard/index')
          expect(await browser.elementByCss('p').text()).toContain(
            'hello from app/dashboard/index'
          )

          await next.patchFile(
            filePath,
            origContent.replace('hello from', 'swapped from')
          )

          await check(() => browser.elementByCss('p').text(), /swapped from/)
        } finally {
          await next.patchFile(filePath, origContent)
        }
      })

      it('should HMR correctly for client component', async () => {
        const filePath = 'app/client-component-route/page.js'
        const origContent = await next.readFile(filePath)

        try {
          const browser = await next.browser('/client-component-route')

          const ssrInitial = await next.render('/client-component-route')

          expect(ssrInitial).toContain('hello from app/client-component-route')

          expect(await browser.elementByCss('p').text()).toContain(
            'hello from app/client-component-route'
          )

          await next.patchFile(
            filePath,
            origContent.replace('hello from', 'swapped from')
          )

          await check(() => browser.elementByCss('p').text(), /swapped from/)

          const ssrUpdated = await next.render('/client-component-route')
          expect(ssrUpdated).toContain('swapped from')

          await next.patchFile(filePath, origContent)

          await check(() => browser.elementByCss('p').text(), /hello from/)
          expect(await next.render('/client-component-route')).toContain(
            'hello from'
          )
        } finally {
          await next.patchFile(filePath, origContent)
        }
      })

      // TODO: investigate flakey behavior with this test case
      it.skip('should HMR correctly when changing the component type', async () => {
        const filePath = 'app/dashboard/page/page.jsx'
        const origContent = await next.readFile(filePath)

        try {
          const browser = await next.browser('/dashboard/page')

          expect(await browser.elementByCss('p').text()).toContain(
            'hello dashboard/page!'
          )

          // Test HMR with server component
          await next.patchFile(
            filePath,
            origContent.replace(
              'hello dashboard/page!',
              'hello dashboard/page in server component!'
            )
          )
          await check(
            () => browser.elementByCss('p').text(),
            /in server component/
          )

          // Change to client component
          await next.patchFile(
            filePath,
            origContent
              .replace("// 'use client'", "'use client'")
              .replace(
                'hello dashboard/page!',
                'hello dashboard/page in client component!'
              )
          )
          await check(
            () => browser.elementByCss('p').text(),
            /in client component/
          )

          // Change back to server component
          await next.patchFile(
            filePath,
            origContent.replace(
              'hello dashboard/page!',
              'hello dashboard/page in server component2!'
            )
          )
          await check(
            () => browser.elementByCss('p').text(),
            /in server component2/
          )

          // Change to client component again
          await next.patchFile(
            filePath,
            origContent
              .replace("// 'use client'", "'use client'")
              .replace(
                'hello dashboard/page!',
                'hello dashboard/page in client component2!'
              )
          )
          await check(
            () => browser.elementByCss('p').text(),
            /in client component2/
          )
        } finally {
          await next.patchFile(filePath, origContent)
        }
      })
    })
  }

  describe('searchParams prop', () => {
    describe('client component', () => {
      it('should have the correct search params', async () => {
        const $ = await next.render$(
          '/search-params-prop?first=value&second=other%20value&third'
        )
        const el = $('#params')
        expect(el.attr('data-param-first')).toBe('value')
        expect(el.attr('data-param-second')).toBe('other value')
        expect(el.attr('data-param-third')).toBe('')
        expect(el.attr('data-param-not-real')).toBe('N/A')
      })

      it('should have the correct search params on rewrite', async () => {
        const $ = await next.render$('/search-params-prop-rewrite')
        const el = $('#params')
        expect(el.attr('data-param-first')).toBe('value')
        expect(el.attr('data-param-second')).toBe('other value')
        expect(el.attr('data-param-third')).toBe('')
        expect(el.attr('data-param-not-real')).toBe('N/A')
      })

      it('should have the correct search params on middleware rewrite', async () => {
        const $ = await next.render$('/search-params-prop-middleware-rewrite')
        const el = $('#params')
        expect(el.attr('data-param-first')).toBe('value')
        expect(el.attr('data-param-second')).toBe('other value')
        expect(el.attr('data-param-third')).toBe('')
        expect(el.attr('data-param-not-real')).toBe('N/A')
      })
    })

    describe('server component', () => {
      it('should have the correct search params', async () => {
        const $ = await next.render$(
          '/search-params-prop/server?first=value&second=other%20value&third'
        )
        const el = $('#params')
        expect(el.attr('data-param-first')).toBe('value')
        expect(el.attr('data-param-second')).toBe('other value')
        expect(el.attr('data-param-third')).toBe('')
        expect(el.attr('data-param-not-real')).toBe('N/A')
      })

      it('should have the correct search params on rewrite', async () => {
        const $ = await next.render$('/search-params-prop-server-rewrite')
        const el = $('#params')
        expect(el.attr('data-param-first')).toBe('value')
        expect(el.attr('data-param-second')).toBe('other value')
        expect(el.attr('data-param-third')).toBe('')
        expect(el.attr('data-param-not-real')).toBe('N/A')
      })

      it('should have the correct search params on middleware rewrite', async () => {
        const $ = await next.render$(
          '/search-params-prop-server-middleware-rewrite'
        )
        const el = $('#params')
        expect(el.attr('data-param-first')).toBe('value')
        expect(el.attr('data-param-second')).toBe('other value')
        expect(el.attr('data-param-third')).toBe('')
        expect(el.attr('data-param-not-real')).toBe('N/A')
      })
    })
  })

  describe('template component', () => {
    it('should render the template that holds state in a client component and reset on navigation', async () => {
      const browser = await next.browser('/template/clientcomponent')
      expect(await browser.elementByCss('h1').text()).toBe('Template 0')
      await browser.elementByCss('button').click()
      expect(await browser.elementByCss('h1').text()).toBe('Template 1')

      await browser.elementByCss('#link').click()
      await browser.waitForElementByCss('#other-page')

      expect(await browser.elementByCss('h1').text()).toBe('Template 0')
      await browser.elementByCss('button').click()
      expect(await browser.elementByCss('h1').text()).toBe('Template 1')

      await browser.elementByCss('#link').click()
      await browser.waitForElementByCss('#page')

      expect(await browser.elementByCss('h1').text()).toBe('Template 0')
    })

    // TODO-APP: disable failing test and investigate later
    ;(isNextDev ||
      // When PPR is enabled, the shared layouts re-render because we prefetch
      // from the root. This will be addressed before GA.
      isPPREnabledByDefault
      ? it.skip
      : it)(
      'should render the template that is a server component and rerender on navigation',
      async () => {
        const browser = await next.browser('/template/servercomponent')
        // eslint-disable-next-line jest/no-standalone-expect
        expect(await browser.elementByCss('h1').text()).toStartWith('Template')

        const currentTime = await browser
          .elementByCss('#performance-now')
          .text()

        await browser.elementByCss('#link').click()
        await browser.waitForElementByCss('#other-page')

        // eslint-disable-next-line jest/no-standalone-expect
        expect(await browser.elementByCss('h1').text()).toStartWith('Template')

        // template should rerender on navigation even when it's a server component
        // eslint-disable-next-line jest/no-standalone-expect
        expect(await browser.elementByCss('#performance-now').text()).toBe(
          currentTime
        )

        await browser.elementByCss('#link').click()
        await browser.waitForElementByCss('#page')

        // eslint-disable-next-line jest/no-standalone-expect
        expect(await browser.elementByCss('#performance-now').text()).toBe(
          currentTime
        )
      }
    )
  })

  describe('known bugs', () => {
    describe('should support React cache', () => {
      it('server component', async () => {
        const browser = await next.browser('/react-cache/server-component')
        const val1 = await browser.elementByCss('#value-1').text()
        const val2 = await browser.elementByCss('#value-2').text()
        expect(val1).toBe(val2)
      })

      it('server component client-navigation', async () => {
        const browser = await next.browser('/react-cache')

        await browser
          .elementByCss('#to-server-component')
          .click()
          .waitForElementByCss('#value-1', 10000)
        const val1 = await browser.elementByCss('#value-1').text()
        const val2 = await browser.elementByCss('#value-2').text()
        expect(val1).toBe(val2)
      })

      it('client component', async () => {
        const browser = await next.browser('/react-cache/client-component')
        const val1 = await browser.elementByCss('#value-1').text()
        const val2 = await browser.elementByCss('#value-2').text()
        // React.cache is not supported in client components.
        expect(val1).not.toBe(val2)
      })

      it('client component client-navigation', async () => {
        const browser = await next.browser('/react-cache')

        await browser
          .elementByCss('#to-client-component')
          .click()
          .waitForElementByCss('#value-1', 10000)
        const val1 = await browser.elementByCss('#value-1').text()
        const val2 = await browser.elementByCss('#value-2').text()
        // React.cache is not supported in client components.
        expect(val1).not.toBe(val2)
      })

      it('middleware overriding headers', async () => {
        const browser = await next.browser('/searchparams-normalization-bug')
        await browser.eval(`window.didFullPageTransition = 'no'`)
        expect(await browser.elementByCss('#header-empty').text()).toBe(
          'Header value: empty'
        )
        expect(
          await browser
            .elementByCss('#button-a')
            .click()
            .waitForElementByCss('#header-a')
            .text()
        ).toBe('Header value: a')
        expect(
          await browser
            .elementByCss('#button-b')
            .click()
            .waitForElementByCss('#header-b')
            .text()
        ).toBe('Header value: b')
        expect(
          await browser
            .elementByCss('#button-c')
            .click()
            .waitForElementByCss('#header-c')
            .text()
        ).toBe('Header value: c')
        expect(await browser.eval(`window.didFullPageTransition`)).toBe('no')
      })
    })

    describe('should support React fetch instrumentation', () => {
      it('server component', async () => {
        // trigger compilation of 404 here first.
        // Any other page being compiled between refresh of a page would get us fresh modules i.e. not catch previous regressions where we restored the wrong fetch.
        await next.browser('/_not-found')
        const browser = await next.browser('/react-fetch/server-component')
        const val1 = await browser.elementByCss('#value-1').text()
        const val2 = await browser.elementByCss('#value-2').text()
        expect(val1).toBe(val2)

        await browser.refresh()

        const val1AfterRefresh = await browser.elementByCss('#value-1').text()
        const val2AfterRefresh = await browser.elementByCss('#value-2').text()
        expect(val1AfterRefresh).toBe(val2AfterRefresh)
      })

      it('server component client-navigation', async () => {
        const browser = await next.browser('/react-fetch')

        await browser
          .elementByCss('#to-server-component')
          .click()
          .waitForElementByCss('#value-1', 10000)
        const val1 = await browser.elementByCss('#value-1').text()
        const val2 = await browser.elementByCss('#value-2').text()

        // TODO: enable when fetch cache is enabled in dev
        if (!isNextDev) {
          expect(val1).toBe(val2)
        }
      })

      // TODO-APP: React doesn't have fetch deduping for client components yet.
      it.skip('client component', async () => {
        const browser = await next.browser('/react-fetch/client-component')
        const val1 = await browser.elementByCss('#value-1').text()
        const val2 = await browser.elementByCss('#value-2').text()
        expect(val1).toBe(val2)
      })

      // TODO-APP: React doesn't have fetch deduping for client components yet.
      it.skip('client component client-navigation', async () => {
        const browser = await next.browser('/react-fetch')

        await browser
          .elementByCss('#to-client-component')
          .click()
          .waitForElementByCss('#value-1', 10000)
        const val1 = await browser.elementByCss('#value-1').text()
        const val2 = await browser.elementByCss('#value-2').text()
        expect(val1).toBe(val2)
      })
    })
    it('should not share flight data between requests', async () => {
      const fetches = await Promise.all(
        [...new Array(5)].map(() => next.render('/loading-bug/electronics'))
      )

      for (const text of fetches) {
        const $ = cheerio.load(text)
        expect($('#category-id').text()).toBe('electronicsabc')
      }
    })
    it('should handle router.refresh without resetting state', async () => {
      const browser = await next.browser(
        '/navigation/refresh/navigate-then-refresh-bug'
      )
      await browser
        .elementByCss('#to-route')
        // Navigate to the page
        .click()
        // Wait for new page to be loaded
        .waitForElementByCss('#refresh-page')
        // Click the refresh button to trigger a refresh
        .click()

      // Wait for element that is shown when refreshed and verify text
      expect(await browser.waitForElementByCss('#refreshed').text()).toBe(
        'Refreshed page successfully!'
      )

      expect(
        await browser.eval(
          `window.getComputedStyle(document.querySelector('h1')).backgroundColor`
        )
      ).toBe('rgb(34, 139, 34)')
    })
    it('should handle as on next/link', async () => {
      const browser = await next.browser('/link-with-as')
      expect(
        await browser
          .elementByCss('#link-to-info-123')
          .click()
          .waitForElementByCss('#message')
          .text()
      ).toBe(`hello from app/dashboard/deployments/info/[id]. ID is: 123`)
    })
    it('should handle next/link back to initially loaded page', async () => {
      const browser = await next.browser('/linking/about')
      expect(
        await browser
          .elementByCss('a[href="/linking"]')
          .click()
          .waitForElementByCss('#home-page')
          .text()
      ).toBe(`Home page`)

      expect(
        await browser
          .elementByCss('a[href="/linking/about"]')
          .click()
          .waitForElementByCss('#about-page')
          .text()
      ).toBe(`About page`)
    })
    it('should not do additional pushState when already on the page', async () => {
      const browser = await next.browser('/linking/about')
      const goToLinkingPage = async () => {
        expect(
          await browser
            .elementByCss('a[href="/linking"]')
            .click()
            .waitForElementByCss('#home-page')
            .text()
        ).toBe(`Home page`)
      }

      await goToLinkingPage()
      await waitFor(1000)
      await goToLinkingPage()
      await waitFor(1000)
      await goToLinkingPage()
      await waitFor(1000)

      expect(
        await browser.back().waitForElementByCss('#about-page', 2000).text()
      ).toBe(`About page`)
    })
  })

  describe('next/script', () => {
    if (!isNextDeploy) {
      it('should support next/script and render in correct order', async () => {
        const browser = await next.browser('/script')

        // Wait for lazyOnload scripts to be ready.
        await check(async () => {
          expect(await browser.eval(`window._script_order`)).toStrictEqual([
            1,
            1.5,
            2,
            2.5,
            'render',
            3,
            4,
          ])
          return 'yes'
        }, 'yes')
      })

      it('should pass on extra props for beforeInteractive scripts with a src prop', async () => {
        const browser = await next.browser('/script')

        const foundProps = await browser.eval(
          `document.querySelector('#script-with-src-noop-test').getAttribute('data-extra-prop')`
        )

        expect(foundProps).toBe('script-with-src')
      })

      it('should pass on extra props for beforeInteractive scripts without a src prop', async () => {
        const browser = await next.browser('/script')

        const foundProps = await browser.eval(
          `document.querySelector('#script-without-src-noop-test-dangerouslySetInnerHTML').getAttribute('data-extra-prop')`
        )

        expect(foundProps).toBe('script-without-src')
      })
    }

    it('should insert preload tags for beforeInteractive and afterInteractive scripts', async () => {
      const html = await next.render('/script')
      const $ = cheerio.load(html)

      const scriptPreloads = $(
        'link[rel="preload"][as="script"][href^="/test"]'
      )
      const expectedHrefs = new Set(['/test1.js', '/test2.js', '/test3.js'])
      expect(scriptPreloads.length).toBe(3)
      scriptPreloads.each((i, el) => {
        expect(expectedHrefs.has(el.attribs.href)).toBe(true)
        expectedHrefs.delete(el.attribs.href)
      })

      // test4.js has lazyOnload which doesn't need to be preloaded
      const lazyPreloads = $(
        'link[rel="preload"][as="script"][href="/test4.js"]'
      )
      expect(lazyPreloads.length).toBe(0)
    })

    it('should load stylesheets for next/scripts', async () => {
      const html = await next.render('/script')
      const $ = cheerio.load(html)

      expect($('link[href="/style3.css"]').length).toBe(1)
      expect($('link[href="/style1a.css"]').length).toBe(1)
      expect($('link[href="/style1b.css"]').length).toBe(1)
    })

    it('should pass `nonce`', async () => {
      const html = await next.render('/script-nonce')
      const $ = cheerio.load(html)
      const scripts = $('script, link[rel="preload"][as="script"]')

      scripts.each((_, element) => {
        expect(element.attribs.nonce).toBeTruthy()
      })

      if (!isNextDev) {
        const browser = await next.browser('/script-nonce')

        await retry(async () => {
          await browser.elementByCss('#get-order').click()
          const order = JSON.parse(await browser.elementByCss('#order').text())
          expect(order?.length).toBe(2)
        })
      }
    })

    it('should pass manual `nonce`', async () => {
      const html = await next.render('/script-manual-nonce')
      const $ = cheerio.load(html)
      let scripts = $('script, link[rel="preload"][as="script"]')

      scripts = scripts.filter((_, element) =>
        (element.attribs.src || element.attribs.href)?.startsWith('/test')
      )

      expect(scripts.length).toBeGreaterThan(0)

      scripts.each((_, element) => {
        expect(element.attribs.nonce).toBeTruthy()
      })

      if (!isNextDev) {
        const browser = await next.browser('/script-manual-nonce')

        await retry(async () => {
          await browser.elementByCss('#get-order').click()
          const order = JSON.parse(await browser.elementByCss('#order').text())
          expect(order?.length).toBe(2)
        })
      }
    })

    it('should pass manual `nonce` pages', async () => {
      const html = await next.render('/pages-script-manual-nonce')
      const $ = cheerio.load(html)
      let scripts = $('script, link[rel="preload"][as="script"]')

      scripts = scripts.filter((_, element) =>
        (element.attribs.src || element.attribs.href)?.startsWith('/test')
      )

      expect(scripts.length).toBeGreaterThan(0)

      scripts.each((_, element) => {
        expect(element.attribs.nonce).toBeTruthy()
      })

      if (!isNextDev) {
        await retry(async () => {
          const browser = await next.browser('/pages-script-manual-nonce')
          await browser.elementByCss('#get-order').click()
          const order = JSON.parse(await browser.elementByCss('#order').text())
          expect(order?.length).toBe(2)
        })
      }
    })

    it('should pass nonce when using next/font', async () => {
      const html = await next.render('/script-nonce/with-next-font')
      const $ = cheerio.load(html)
      const scripts = $('script, link[rel="preload"][as="script"]')

      scripts.each((_, element) => {
        expect(element.attribs.nonce).toBeTruthy()
      })
    })
  })

  describe('data fetch with response over 16KB with chunked encoding', () => {
    it('should load page when fetching a large amount of data', async () => {
      const browser = await next.browser('/very-large-data-fetch')
      expect(await (await browser.waitForElementByCss('#done')).text()).toBe(
        'Hello world'
      )
      expect(await browser.elementByCss('p').text()).toBe('item count 128000')
    })
  })

  describe('bootstrap scripts', () => {
    it('should only bootstrap with one script, prinitializing the rest', async () => {
      const html = await next.render('/bootstrap')
      const $ = cheerio.load(html)

      // We assume a minimum of 2 scripts, webpack runtime + main-app
      expect($('script[async]').length).toBeGreaterThan(1)
      expect($('body').find('script[async]').length).toBe(1)
    })

    // This test is here to ensure that we don't accidentally turn CSP off
    // for the prod version.
    it('should successfully bootstrap even when using CSP', async () => {
      // This path has a nonce applied in middleware
      const browser = await next.browser('/bootstrap/with-nonce')
      const response = await next.fetch('/bootstrap/with-nonce')
      // We expect this page to response with CSP headers requiring a nonce for scripts
      expect(response.headers.get('content-security-policy')).toEqual(
        isNextDev
          ? "script-src 'nonce-my-random-nonce' 'strict-dynamic' 'unsafe-eval';"
          : "script-src 'nonce-my-random-nonce' 'strict-dynamic';"
      )
      // We expect to find the updated text which demonstrates our app
      // was able to bootstrap successfully (scripts run)
      await retry(async () => {
        expect(await browser.elementByCss('#val').text()).toEqual('[[updated]]')
      })
    })
  })

  // this one comes at the end to not change behavior from above
  // assertions with compile mode specifically
  // consider breaking out into separate fixture if we expand this any more
  if (process.env.NEXT_EXPERIMENTAL_COMPILE) {
    it('should run generate command correctly', async () => {
      await next.stop()

      next.buildCommand = `pnpm next build --experimental-build-mode=generate`
      await next.start()

      let browser = await next.browser('/')

      expect(await browser.elementByCss('#my-env').text()).toBe(
        next.env.NEXT_PUBLIC_TEST_ID
      )
      expect(await browser.elementByCss('#my-other-env').text()).toBe(
        `${next.env.NEXT_PUBLIC_TEST_ID}-suffix`
      )

      browser = await next.browser('/dashboard/deployments/123')

      expect(await browser.elementByCss('#my-env').text()).toBe(
        next.env.NEXT_PUBLIC_TEST_ID
      )
      expect(await browser.elementByCss('#my-other-env').text()).toBe(
        `${next.env.NEXT_PUBLIC_TEST_ID}-suffix`
      )
    })
  }
})