forked from vercel/next.js
/
rendering.test.ts
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/
rendering.test.ts
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import { createNext, FileRef } from 'e2e-utils'
import { NextInstance } from 'test/lib/next-modes/base'
import { renderViaHTTP, fetchViaHTTP, waitFor } from 'next-test-utils'
import path from 'path'
import cheerio from 'cheerio'
describe('app dir rendering', () => {
if (process.env.NEXT_TEST_REACT_VERSION === '^17') {
it('should skip for react v17', () => {})
return
}
if ((global as any).isNextDeploy) {
it('should skip next deploy for now', () => {})
return
}
const isDev = (global as any).isNextDev
let next: NextInstance
beforeAll(async () => {
next = await createNext({
files: new FileRef(path.join(__dirname, 'app-rendering')),
dependencies: {
react: 'experimental',
'react-dom': 'experimental',
},
})
})
afterAll(() => next.destroy())
it('should serve app/page.server.js at /', async () => {
const html = await renderViaHTTP(next.url, '/')
expect(html).toContain('app/page.server.js')
})
describe('getServerSideProps only', () => {
it('should run getServerSideProps in layout and page', async () => {
const html = await renderViaHTTP(
next.url,
'/getserversideprops-only/nested'
)
const $ = cheerio.load(html)
expect($('#layout-message').text()).toBe('hello from layout')
expect($('#page-message').text()).toBe('hello from page')
})
it('should run getServerSideProps in parallel', async () => {
const startTime = Date.now()
const html = await renderViaHTTP(
next.url,
'/getserversideprops-only/slow'
)
const endTime = Date.now()
const duration = endTime - startTime
// Each part takes 5 seconds so it should be below 10 seconds
// Using 7 seconds to ensure external factors causing slight slowness don't fail the tests
expect(duration < 7000).toBe(true)
const $ = cheerio.load(html)
expect($('#slow-layout-message').text()).toBe('hello from slow layout')
expect($('#slow-page-message').text()).toBe('hello from slow page')
})
})
describe('getStaticProps only', () => {
it('should run getStaticProps in layout and page', async () => {
const html = await renderViaHTTP(next.url, '/getstaticprops-only/nested')
const $ = cheerio.load(html)
expect($('#layout-message').text()).toBe('hello from layout')
expect($('#page-message').text()).toBe('hello from page')
})
it(`should run getStaticProps in parallel ${
isDev ? 'during development' : 'and use cached version for production'
}`, async () => {
const startTime = Date.now()
const html = await renderViaHTTP(next.url, '/getstaticprops-only/slow')
const endTime = Date.now()
const duration = endTime - startTime
// Each part takes 5 seconds so it should be below 10 seconds
// Using 7 seconds to ensure external factors causing slight slowness don't fail the tests
// TODO: cache static props in prod
// expect(duration < (isDev ? 7000 : 2000)).toBe(true)
expect(duration < 7000).toBe(true)
const $ = cheerio.load(html)
expect($('#slow-layout-message').text()).toBe('hello from slow layout')
expect($('#slow-page-message').text()).toBe('hello from slow page')
})
})
describe('getStaticProps ISR', () => {
it('should revalidate the page when getStaticProps return revalidate', async () => {
const getPage = async () => {
const res = await fetchViaHTTP(
next.url,
'getstaticprops-isr-multiple/nested'
)
const html = await res.text()
return {
$: cheerio.load(html),
cacheHeader: res.headers['x-nextjs-cache'],
}
}
const { $ } = await getPage()
expect($('#layout-message').text()).toBe('hello from layout')
expect($('#page-message').text()).toBe('hello from page')
const layoutNow = $('#layout-now').text()
const pageNow = $('#page-now').text()
await waitFor(2000)
// TODO: implement
// Trigger revalidate
// const { cacheHeader: revalidateCacheHeader } = await getPage()
// expect(revalidateCacheHeader).toBe('STALE')
// TODO: implement
const { $: $revalidated /* cacheHeader: revalidatedCacheHeader */ } =
await getPage()
// expect(revalidatedCacheHeader).toBe('REVALIDATED')
const layoutNowRevalidated = $revalidated('#layout-now').text()
const pageNowRevalidated = $revalidated('#page-now').text()
// Expect that the `Date.now()` is different as the page have been regenerated
expect(layoutNow).not.toBe(layoutNowRevalidated)
expect(pageNow).not.toBe(pageNowRevalidated)
})
})
// TODO: implement
describe.skip('getStaticProps and getServerSideProps without ISR', () => {
it('should generate getStaticProps data during build an use it', async () => {
const getPage = async () => {
const html = await renderViaHTTP(
next.url,
'getstaticprops-getserversideprops-combined/nested'
)
return {
$: cheerio.load(html),
}
}
const { $ } = await getPage()
expect($('#layout-message').text()).toBe('hello from layout')
expect($('#page-message').text()).toBe('hello from page')
const layoutNow = $('#layout-now').text()
const pageNow = $('#page-now').text()
const { $: $second } = await getPage()
const layoutNowSecond = $second('#layout-now').text()
const pageNowSecond = $second('#page-now').text()
// Expect that the `Date.now()` is different as it came from getServerSideProps
expect(layoutNow).not.toBe(layoutNowSecond)
// Expect that the `Date.now()` is the same as it came from getStaticProps
expect(pageNow).toBe(pageNowSecond)
})
})
})