next.js/test/e2e/app-dir/custom-cache-control/custom-cache-control.test.ts

import { nextTestSetup } from 'e2e-utils'

describe('custom-cache-control', () => {
  const { next, isNextDev, isNextDeploy } = nextTestSetup({
    files: __dirname,
  })

  if (isNextDeploy) {
    // customizing these headers won't apply on environments
    // where headers are applied outside of the Next.js server
    it('should skip for deploy', () => {})
    return
  }

  it('should have custom cache-control for app-ssg prerendered', async () => {
    const res = await next.fetch('/app-ssg/first')
    expect(res.headers.get('cache-control')).toBe(
      isNextDev ? 'no-store, must-revalidate' : 's-maxage=30'
    )
  })

  it('should have custom cache-control for app-ssg lazy', async () => {
    const res = await next.fetch('/app-ssg/lazy')
    expect(res.headers.get('cache-control')).toBe(
      isNextDev ? 'no-store, must-revalidate' : 's-maxage=31'
    )
  })
  ;(process.env.__NEXT_CACHE_COMPONENTS ? it.skip : it)(
    'should have default cache-control for app-ssg another',
    async () => {
      const res = await next.fetch('/app-ssg/another')
      // eslint-disable-next-line jest/no-standalone-expect
      expect(res.headers.get('cache-control')).toBe(
        isNextDev
          ? 'no-store, must-revalidate'
          : 's-maxage=120, stale-while-revalidate=31535880'
      )
    }
  )

  it('should have custom cache-control for app-ssr', async () => {
    const res = await next.fetch('/app-ssr')
    expect(res.headers.get('cache-control')).toBe(
      isNextDev ? 'no-store, must-revalidate' : 's-maxage=32'
    )
  })

  it('should have custom cache-control for auto static page', async () => {
    const res = await next.fetch('/pages-auto-static')
    expect(res.headers.get('cache-control')).toBe(
      isNextDev ? 'no-store, must-revalidate' : 's-maxage=33'
    )
  })

  it('should have custom cache-control for pages-ssg prerendered', async () => {
    const res = await next.fetch('/pages-ssg/first')
    expect(res.headers.get('cache-control')).toBe(
      isNextDev ? 'no-store, must-revalidate' : 's-maxage=34'
    )
  })

  it('should have custom cache-control for pages-ssg lazy', async () => {
    const res = await next.fetch('/pages-ssg/lazy')
    expect(res.headers.get('cache-control')).toBe(
      isNextDev ? 'no-store, must-revalidate' : 's-maxage=35'
    )
  })

  it('should have default cache-control for pages-ssg another', async () => {
    const res = await next.fetch('/pages-ssg/another')
    expect(res.headers.get('cache-control')).toBe(
      isNextDev
        ? 'no-store, must-revalidate'
        : 's-maxage=120, stale-while-revalidate=31535880'
    )
  })

  it('should have default cache-control for pages-ssr', async () => {
    const res = await next.fetch('/pages-ssr')
    expect(res.headers.get('cache-control')).toBe(
      isNextDev ? 'no-store, must-revalidate' : 's-maxage=36'
    )
  })
})