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prerender.test.ts
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prerender.test.ts
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import cheerio from 'cheerio'
import { join, sep } from 'path'
import escapeRegex from 'escape-string-regexp'
import { createNext, FileRef } from 'e2e-utils'
import { NextInstance } from 'test/lib/next-modes/base'
import {
check,
fetchViaHTTP,
getBrowserBodyText,
getRedboxHeader,
hasRedbox,
normalizeRegEx,
renderViaHTTP,
waitFor,
} from 'next-test-utils'
import webdriver from 'next-webdriver'
describe('Prerender', () => {
let next: NextInstance
beforeAll(async () => {
next = await createNext({
files: {
pages: new FileRef(join(__dirname, 'prerender/pages')),
'world.txt': new FileRef(join(__dirname, 'prerender/world.txt')),
},
dependencies: {
firebase: '7.14.5',
},
nextConfig: {
async rewrites() {
return [
{
source: '/some-rewrite/:item',
destination: '/blog/post-:item',
},
{
source: '/about',
destination: '/lang/en/about',
},
{
source: '/blocked-create',
destination: '/blocking-fallback/blocked-create',
},
]
},
},
})
})
afterAll(() => next.destroy())
function isCachingHeader(cacheControl) {
return !cacheControl || !/no-store/.test(cacheControl)
}
const expectedManifestRoutes = () => ({
'/': {
dataRoute: `/_next/data/${next.buildId}/index.json`,
initialRevalidateSeconds: 2,
srcRoute: null,
},
'/blog/[post3]': {
dataRoute: `/_next/data/${next.buildId}/blog/[post3].json`,
initialRevalidateSeconds: 10,
srcRoute: '/blog/[post]',
},
'/blog/post-1': {
dataRoute: `/_next/data/${next.buildId}/blog/post-1.json`,
initialRevalidateSeconds: 10,
srcRoute: '/blog/[post]',
},
'/blog/post-2': {
dataRoute: `/_next/data/${next.buildId}/blog/post-2.json`,
initialRevalidateSeconds: 10,
srcRoute: '/blog/[post]',
},
'/blog/post-4': {
dataRoute: `/_next/data/${next.buildId}/blog/post-4.json`,
initialRevalidateSeconds: 10,
srcRoute: '/blog/[post]',
},
'/blog/post-1/comment-1': {
dataRoute: `/_next/data/${next.buildId}/blog/post-1/comment-1.json`,
initialRevalidateSeconds: 2,
srcRoute: '/blog/[post]/[comment]',
},
'/blog/post-2/comment-2': {
dataRoute: `/_next/data/${next.buildId}/blog/post-2/comment-2.json`,
initialRevalidateSeconds: 2,
srcRoute: '/blog/[post]/[comment]',
},
'/blog/post.1': {
dataRoute: `/_next/data/${next.buildId}/blog/post.1.json`,
initialRevalidateSeconds: 10,
srcRoute: '/blog/[post]',
},
'/catchall-explicit/another/value': {
dataRoute: `/_next/data/${next.buildId}/catchall-explicit/another/value.json`,
initialRevalidateSeconds: 1,
srcRoute: '/catchall-explicit/[...slug]',
},
'/catchall-explicit/first': {
dataRoute: `/_next/data/${next.buildId}/catchall-explicit/first.json`,
initialRevalidateSeconds: 1,
srcRoute: '/catchall-explicit/[...slug]',
},
'/catchall-explicit/hello/another': {
dataRoute: `/_next/data/${next.buildId}/catchall-explicit/hello/another.json`,
initialRevalidateSeconds: 1,
srcRoute: '/catchall-explicit/[...slug]',
},
'/catchall-explicit/second': {
dataRoute: `/_next/data/${next.buildId}/catchall-explicit/second.json`,
initialRevalidateSeconds: 1,
srcRoute: '/catchall-explicit/[...slug]',
},
'/catchall-explicit/[first]/[second]': {
dataRoute: `/_next/data/${next.buildId}/catchall-explicit/[first]/[second].json`,
initialRevalidateSeconds: 1,
srcRoute: '/catchall-explicit/[...slug]',
},
'/catchall-explicit/[third]/[fourth]': {
dataRoute: `/_next/data/${next.buildId}/catchall-explicit/[third]/[fourth].json`,
initialRevalidateSeconds: 1,
srcRoute: '/catchall-explicit/[...slug]',
},
'/catchall-optional': {
dataRoute: `/_next/data/${next.buildId}/catchall-optional.json`,
initialRevalidateSeconds: false,
srcRoute: '/catchall-optional/[[...slug]]',
},
'/catchall-optional/value': {
dataRoute: `/_next/data/${next.buildId}/catchall-optional/value.json`,
initialRevalidateSeconds: false,
srcRoute: '/catchall-optional/[[...slug]]',
},
'/large-page-data': {
dataRoute: `/_next/data/${next.buildId}/large-page-data.json`,
initialRevalidateSeconds: false,
srcRoute: null,
},
'/another': {
dataRoute: `/_next/data/${next.buildId}/another.json`,
initialRevalidateSeconds: 1,
srcRoute: null,
},
'/api-docs/first': {
dataRoute: `/_next/data/${next.buildId}/api-docs/first.json`,
initialRevalidateSeconds: false,
srcRoute: '/api-docs/[...slug]',
},
'/blocking-fallback-once/404-on-manual-revalidate': {
dataRoute: `/_next/data/${next.buildId}/blocking-fallback-once/404-on-manual-revalidate.json`,
initialRevalidateSeconds: false,
srcRoute: '/blocking-fallback-once/[slug]',
},
'/blocking-fallback-some/a': {
dataRoute: `/_next/data/${next.buildId}/blocking-fallback-some/a.json`,
initialRevalidateSeconds: 1,
srcRoute: '/blocking-fallback-some/[slug]',
},
'/blocking-fallback-some/b': {
dataRoute: `/_next/data/${next.buildId}/blocking-fallback-some/b.json`,
initialRevalidateSeconds: 1,
srcRoute: '/blocking-fallback-some/[slug]',
},
'/blocking-fallback/test-errors-1': {
dataRoute: `/_next/data/${next.buildId}/blocking-fallback/test-errors-1.json`,
initialRevalidateSeconds: 1,
srcRoute: '/blocking-fallback/[slug]',
},
'/blog': {
dataRoute: `/_next/data/${next.buildId}/blog.json`,
initialRevalidateSeconds: 10,
srcRoute: null,
},
'/default-revalidate': {
dataRoute: `/_next/data/${next.buildId}/default-revalidate.json`,
initialRevalidateSeconds: false,
srcRoute: null,
},
'/dynamic/[first]': {
dataRoute: `/_next/data/${next.buildId}/dynamic/[first].json`,
initialRevalidateSeconds: false,
srcRoute: '/dynamic/[slug]',
},
'/dynamic/[second]': {
dataRoute: `/_next/data/${next.buildId}/dynamic/[second].json`,
initialRevalidateSeconds: false,
srcRoute: '/dynamic/[slug]',
},
'/index': {
dataRoute: `/_next/data/${next.buildId}/index/index.json`,
initialRevalidateSeconds: false,
srcRoute: null,
},
'/lang/de/about': {
dataRoute: `/_next/data/${next.buildId}/lang/de/about.json`,
initialRevalidateSeconds: false,
srcRoute: '/lang/[lang]/about',
},
'/lang/en/about': {
dataRoute: `/_next/data/${next.buildId}/lang/en/about.json`,
initialRevalidateSeconds: false,
srcRoute: '/lang/[lang]/about',
},
'/lang/es/about': {
dataRoute: `/_next/data/${next.buildId}/lang/es/about.json`,
initialRevalidateSeconds: false,
srcRoute: '/lang/[lang]/about',
},
'/lang/fr/about': {
dataRoute: `/_next/data/${next.buildId}/lang/fr/about.json`,
initialRevalidateSeconds: false,
srcRoute: '/lang/[lang]/about',
},
'/something': {
dataRoute: `/_next/data/${next.buildId}/something.json`,
initialRevalidateSeconds: false,
srcRoute: null,
},
'/catchall/another/value': {
dataRoute: `/_next/data/${next.buildId}/catchall/another/value.json`,
initialRevalidateSeconds: 1,
srcRoute: '/catchall/[...slug]',
},
'/catchall/first': {
dataRoute: `/_next/data/${next.buildId}/catchall/first.json`,
initialRevalidateSeconds: 1,
srcRoute: '/catchall/[...slug]',
},
'/catchall/second': {
dataRoute: `/_next/data/${next.buildId}/catchall/second.json`,
initialRevalidateSeconds: 1,
srcRoute: '/catchall/[...slug]',
},
'/catchall/hello/another': {
dataRoute: `/_next/data/${next.buildId}/catchall/hello/another.json`,
initialRevalidateSeconds: 1,
srcRoute: '/catchall/[...slug]',
},
})
const navigateTest = (dev = false) => {
it('should navigate between pages successfully', async () => {
const toBuild = [
'/',
'/another',
'/something',
'/normal',
'/blog/post-1',
'/blog/post-1/comment-1',
'/catchall/first',
]
await waitFor(2500)
await Promise.all(toBuild.map((pg) => renderViaHTTP(next.url, pg)))
const browser = await webdriver(next.url, '/')
let text = await browser.elementByCss('p').text()
expect(text).toMatch(/hello.*?world/)
// go to /another
async function goFromHomeToAnother() {
await browser.eval('window.beforeAnother = true')
await browser.elementByCss('#another').click()
await browser.waitForElementByCss('#home')
text = await browser.elementByCss('p').text()
expect(await browser.eval('window.beforeAnother')).toBe(true)
expect(text).toMatch(/hello.*?world/)
}
await goFromHomeToAnother()
// go to /
async function goFromAnotherToHome() {
await browser.eval('window.didTransition = 1')
await browser.elementByCss('#home').click()
await browser.waitForElementByCss('#another')
text = await browser.elementByCss('p').text()
expect(text).toMatch(/hello.*?world/)
expect(await browser.eval('window.didTransition')).toBe(1)
}
await goFromAnotherToHome()
// Client-side SSG data caching test
// eslint-disable-next-line no-lone-blocks
{
// Let revalidation period lapse
await waitFor(2000)
// Trigger revalidation (visit page)
await goFromHomeToAnother()
const snapTime = await browser.elementByCss('#anotherTime').text()
// Wait for revalidation to finish
await waitFor(2000)
// Re-visit page
await goFromAnotherToHome()
await goFromHomeToAnother()
const nextTime = await browser.elementByCss('#anotherTime').text()
if (dev) {
expect(snapTime).not.toMatch(nextTime)
} else {
expect(snapTime).toMatch(nextTime)
}
// Reset to Home for next test
await goFromAnotherToHome()
}
// go to /something
await browser.elementByCss('#something').click()
await browser.waitForElementByCss('#home')
text = await browser.elementByCss('p').text()
expect(text).toMatch(/hello.*?world/)
expect(await browser.eval('window.didTransition')).toBe(1)
// go to /
await browser.elementByCss('#home').click()
await browser.waitForElementByCss('#post-1')
// go to /blog/post-1
await browser.elementByCss('#post-1').click()
await browser.waitForElementByCss('#home')
text = await browser.elementByCss('p').text()
expect(text).toMatch(/Post:.*?post-1/)
expect(await browser.eval('window.didTransition')).toBe(1)
// go to /
await browser.elementByCss('#home').click()
await browser.waitForElementByCss('#comment-1')
// go to /index
await browser.elementByCss('#to-nested-index').click()
await browser.waitForElementByCss('#home')
text = await browser.elementByCss('p').text()
expect(text).toMatch(/hello nested index/)
// go to /
await browser.elementByCss('#home').click()
await browser.waitForElementByCss('#comment-1')
// go to /catchall-optional
await browser.elementByCss('#catchall-optional-root').click()
await browser.waitForElementByCss('#home')
text = await browser.elementByCss('p').text()
expect(text).toMatch(/Catch all: \[\]/)
expect(await browser.eval('window.didTransition')).toBe(1)
// go to /
await browser.elementByCss('#home').click()
await browser.waitForElementByCss('#comment-1')
// go to /dynamic/[first]
await browser.elementByCss('#dynamic-first').click()
await browser.waitForElementByCss('#home')
text = await browser.elementByCss('#param').text()
expect(text).toMatch(/Hi \[first\]!/)
expect(await browser.eval('window.didTransition')).toBe(1)
// go to /
await browser.elementByCss('#home').click()
await browser.waitForElementByCss('#comment-1')
// go to /dynamic/[second]
await browser.elementByCss('#dynamic-second').click()
await browser.waitForElementByCss('#home')
text = await browser.elementByCss('#param').text()
expect(text).toMatch(/Hi \[second\]!/)
expect(await browser.eval('window.didTransition')).toBe(1)
// go to /
await browser.elementByCss('#home').click()
await browser.waitForElementByCss('#comment-1')
// go to /catchall-explicit/[first]/[second]
await browser.elementByCss('#catchall-explicit-string').click()
await browser.waitForElementByCss('#home')
text = await browser.elementByCss('#catchall').text()
expect(text).toMatch(/Hi \[first\] \[second\]/)
expect(await browser.eval('window.didTransition')).toBe(1)
// go to /
await browser.elementByCss('#home').click()
await browser.waitForElementByCss('#comment-1')
// go to /catchall-explicit/[first]/[second]
await browser.elementByCss('#catchall-explicit-object').click()
await browser.waitForElementByCss('#home')
text = await browser.elementByCss('#catchall').text()
expect(text).toMatch(/Hi \[third\] \[fourth\]/)
expect(await browser.eval('window.didTransition')).toBe(1)
// go to /
await browser.elementByCss('#home').click()
await browser.waitForElementByCss('#comment-1')
// go to /catchall-optional/value
await browser.elementByCss('#catchall-optional-value').click()
await browser.waitForElementByCss('#home')
text = await browser.elementByCss('p').text()
expect(text).toMatch(/Catch all: \[value\]/)
expect(await browser.eval('window.didTransition')).toBe(1)
// go to /
await browser.elementByCss('#home').click()
await browser.waitForElementByCss('#comment-1')
// go to /blog/post-1/comment-1
await browser.elementByCss('#comment-1').click()
await browser.waitForElementByCss('#home')
text = await browser.elementByCss('p:nth-child(2)').text()
expect(text).toMatch(/Comment:.*?comment-1/)
expect(await browser.eval('window.didTransition')).toBe(1)
// go to /catchall/first
await browser.elementByCss('#home').click()
await browser.waitForElementByCss('#to-catchall')
await browser.elementByCss('#to-catchall').click()
await browser.waitForElementByCss('#catchall')
text = await browser.elementByCss('#catchall').text()
expect(text).toMatch(/Hi.*?first/)
expect(await browser.eval('window.didTransition')).toBe(1)
await browser.close()
})
}
const runTests = (dev = false) => {
navigateTest(dev)
it('should respond with 405 for POST to static page', async () => {
const res = await fetchViaHTTP(next.url, '/', undefined, {
method: 'POST',
})
expect(res.status).toBe(405)
expect(await res.text()).toContain('Method Not Allowed')
})
it('should SSR normal page correctly', async () => {
const html = await renderViaHTTP(next.url, '/')
expect(html).toMatch(/hello.*?world/)
})
it('should SSR incremental page correctly', async () => {
const html = await renderViaHTTP(next.url, '/blog/post-1')
const $ = cheerio.load(html)
expect(JSON.parse($('#__NEXT_DATA__').text()).isFallback).toBe(false)
expect(html).toMatch(/Post:.*?post-1/)
})
it('should SSR blocking path correctly (blocking)', async () => {
const html = await renderViaHTTP(
next.url,
'/blocking-fallback/random-path'
)
const $ = cheerio.load(html)
expect(JSON.parse($('#__NEXT_DATA__').text()).isFallback).toBe(false)
expect($('p').text()).toBe('Post: random-path')
})
it('should SSR blocking path correctly (pre-rendered)', async () => {
const html = await renderViaHTTP(next.url, '/blocking-fallback-some/a')
const $ = cheerio.load(html)
expect(JSON.parse($('#__NEXT_DATA__').text()).isFallback).toBe(false)
expect($('p').text()).toBe('Post: a')
})
it('should have gsp in __NEXT_DATA__', async () => {
const html = await renderViaHTTP(next.url, '/')
const $ = cheerio.load(html)
expect(JSON.parse($('#__NEXT_DATA__').text()).gsp).toBe(true)
})
it('should not have gsp in __NEXT_DATA__ for non-GSP page', async () => {
const html = await renderViaHTTP(next.url, '/normal')
const $ = cheerio.load(html)
expect('gsp' in JSON.parse($('#__NEXT_DATA__').text())).toBe(false)
})
it('should not supply query values to params or useRouter non-dynamic page SSR', async () => {
const html = await renderViaHTTP(next.url, '/something?hello=world')
const $ = cheerio.load(html)
const query = $('#query').text()
expect(JSON.parse(query)).toEqual({})
const params = $('#params').text()
expect(JSON.parse(params)).toEqual({})
})
it('should not supply query values to params in /_next/data request', async () => {
const data = JSON.parse(
await renderViaHTTP(
next.url,
`/_next/data/${next.buildId}/something.json?hello=world`
)
)
expect(data.pageProps.params).toEqual({})
})
it('should not supply query values to params or useRouter dynamic page SSR', async () => {
const html = await renderViaHTTP(next.url, '/blog/post-1?hello=world')
const $ = cheerio.load(html)
const params = $('#params').text()
expect(JSON.parse(params)).toEqual({ post: 'post-1' })
const query = $('#query').text()
expect(JSON.parse(query)).toEqual({ post: 'post-1' })
})
it('should return data correctly', async () => {
const data = JSON.parse(
await renderViaHTTP(
next.url,
expectedManifestRoutes()['/something'].dataRoute
)
)
expect(data.pageProps.world).toBe('world')
})
it('should return data correctly for dynamic page', async () => {
const data = JSON.parse(
await renderViaHTTP(
next.url,
expectedManifestRoutes()['/blog/post-1'].dataRoute
)
)
expect(data.pageProps.post).toBe('post-1')
})
it('should return data correctly for dynamic page (non-seeded)', async () => {
const data = JSON.parse(
await renderViaHTTP(
next.url,
expectedManifestRoutes()['/blog/post-1'].dataRoute.replace(
/post-1/,
'post-3'
)
)
)
expect(data.pageProps.post).toBe('post-3')
})
if (!dev) {
it('should use correct caching headers for a revalidate page', async () => {
const initialRes = await fetchViaHTTP(next.url, '/')
expect(initialRes.headers.get('cache-control')).toBe(
's-maxage=2, stale-while-revalidate'
)
})
}
it('should navigate to a normal page and back', async () => {
const browser = await webdriver(next.url, '/')
let text = await browser.elementByCss('p').text()
expect(text).toMatch(/hello.*?world/)
await browser.elementByCss('#normal').click()
await browser.waitForElementByCss('#normal-text')
text = await browser.elementByCss('#normal-text').text()
expect(text).toMatch(/a normal page/)
})
it('should parse query values on mount correctly', async () => {
const browser = await webdriver(next.url, '/blog/post-1?another=value')
const text = await browser.elementByCss('#query').text()
expect(text).toMatch(/another.*?value/)
expect(text).toMatch(/post.*?post-1/)
})
it('should reload page on failed data request', async () => {
const browser = await webdriver(next.url, '/')
await browser.eval('window.beforeClick = "abc"')
await browser.elementByCss('#broken-post').click()
expect(
await check(() => browser.eval('window.beforeClick'), {
test(v) {
return v !== 'abc'
},
})
).toBe(true)
})
it('should SSR dynamic page with brackets in param as object', async () => {
const html = await renderViaHTTP(next.url, '/dynamic/[first]')
const $ = cheerio.load(html)
expect($('#param').text()).toMatch(/Hi \[first\]!/)
})
it('should navigate to dynamic page with brackets in param as object', async () => {
const browser = await webdriver(next.url, '/')
await browser.elementByCss('#dynamic-first').click()
await browser.waitForElementByCss('#param')
const value = await browser.elementByCss('#param').text()
expect(value).toMatch(/Hi \[first\]!/)
})
it('should SSR dynamic page with brackets in param as string', async () => {
const html = await renderViaHTTP(next.url, '/dynamic/[second]')
const $ = cheerio.load(html)
expect($('#param').text()).toMatch(/Hi \[second\]!/)
})
it('should navigate to dynamic page with brackets in param as string', async () => {
const browser = await webdriver(next.url, '/')
await browser.elementByCss('#dynamic-second').click()
await browser.waitForElementByCss('#param')
const value = await browser.elementByCss('#param').text()
expect(value).toMatch(/Hi \[second\]!/)
})
it('should not return data for fallback: false and missing dynamic page', async () => {
const res1 = await fetchViaHTTP(
next.url,
`/_next/data/${next.buildId}/dynamic/oopsie.json`
)
expect(res1.status).toBe(404)
await waitFor(500)
const res2 = await fetchViaHTTP(
next.url,
`/_next/data/${next.buildId}/dynamic/oopsie.json`
)
expect(res2.status).toBe(404)
await waitFor(500)
const res3 = await fetchViaHTTP(
next.url,
`/_next/data/${next.buildId}/dynamic/oopsie.json`
)
expect(res3.status).toBe(404)
})
it('should server prerendered path correctly for SSG pages that starts with api-docs', async () => {
const html = await renderViaHTTP(next.url, '/api-docs/first')
const $ = cheerio.load(html)
expect($('#api-docs').text()).toBe('API Docs')
expect(JSON.parse($('#props').text())).toEqual({
hello: 'world',
})
})
it('should render correctly for SSG pages that starts with api-docs', async () => {
const browser = await webdriver(next.url, '/api-docs/second')
await browser.waitForElementByCss('#api-docs')
expect(await browser.elementByCss('#api-docs').text()).toBe('API Docs')
expect(JSON.parse(await browser.elementByCss('#props').text())).toEqual({
hello: 'world',
})
})
it('should return data correctly for SSG pages that starts with api-docs', async () => {
const data = await renderViaHTTP(
next.url,
`/_next/data/${next.buildId}/api-docs/first.json`
)
const { pageProps } = JSON.parse(data)
expect(pageProps).toEqual({
hello: 'world',
})
})
it('should SSR catch-all page with brackets in param as string', async () => {
const html = await renderViaHTTP(
next.url,
'/catchall-explicit/[first]/[second]'
)
const $ = cheerio.load(html)
expect($('#catchall').text()).toMatch(/Hi \[first\] \[second\]/)
})
it('should navigate to catch-all page with brackets in param as string', async () => {
const browser = await webdriver(next.url, '/')
await browser.elementByCss('#catchall-explicit-string').click()
await browser.waitForElementByCss('#catchall')
const value = await browser.elementByCss('#catchall').text()
expect(value).toMatch(/Hi \[first\] \[second\]/)
})
it('should SSR catch-all page with brackets in param as object', async () => {
const html = await renderViaHTTP(
next.url,
'/catchall-explicit/[third]/[fourth]'
)
const $ = cheerio.load(html)
expect($('#catchall').text()).toMatch(/Hi \[third\] \[fourth\]/)
})
it('should navigate to catch-all page with brackets in param as object', async () => {
const browser = await webdriver(next.url, '/')
await browser.elementByCss('#catchall-explicit-object').click()
await browser.waitForElementByCss('#catchall')
const value = await browser.elementByCss('#catchall').text()
expect(value).toMatch(/Hi \[third\] \[fourth\]/)
})
if ((global as any).isNextStart) {
// TODO: dev currently renders this page as blocking, meaning it shows the
// server error instead of continuously retrying. Do we want to change this?
it.skip('should reload page on failed data request, and retry', async () => {
const browser = await webdriver(next.url, '/')
await browser.eval('window.beforeClick = "abc"')
await browser.elementByCss('#broken-at-first-post').click()
expect(
await check(() => browser.eval('window.beforeClick'), {
test(v) {
return v !== 'abc'
},
})
).toBe(true)
const text = await browser.elementByCss('#params').text()
expect(text).toMatch(/post.*?post-999/)
})
}
it('should support prerendered catchall route', async () => {
const html = await renderViaHTTP(next.url, '/catchall/another/value')
const $ = cheerio.load(html)
expect(
JSON.parse(cheerio.load(html)('#__NEXT_DATA__').text()).isFallback
).toBe(false)
expect($('#catchall').text()).toMatch(/Hi.*?another value/)
})
it('should support lazy catchall route', async () => {
const html = await renderViaHTTP(next.url, '/catchall/notreturnedinpaths')
const $ = cheerio.load(html)
expect($('#catchall').text()).toBe('fallback')
// hydration
const browser = await webdriver(next.url, '/catchall/delayby3s')
const text1 = await browser.elementByCss('#catchall').text()
expect(text1).toBe('fallback')
await check(
() => browser.elementByCss('#catchall').text(),
/Hi.*?delayby3s/
)
})
it('should support nested lazy catchall route', async () => {
// We will render fallback for a "lazy" route
const html = await renderViaHTTP(
next.url,
'/catchall/notreturnedinpaths/nested'
)
const $ = cheerio.load(html)
expect($('#catchall').text()).toBe('fallback')
// hydration
const browser = await webdriver(next.url, '/catchall/delayby3s/nested')
const text1 = await browser.elementByCss('#catchall').text()
expect(text1).toBe('fallback')
await check(
() => browser.elementByCss('#catchall').text(),
/Hi.*?delayby3s nested/
)
})
it('should support prerendered catchall-explicit route (nested)', async () => {
const html = await renderViaHTTP(
next.url,
'/catchall-explicit/another/value'
)
const $ = cheerio.load(html)
expect(
JSON.parse(cheerio.load(html)('#__NEXT_DATA__').text()).isFallback
).toBe(false)
expect($('#catchall').text()).toMatch(/Hi.*?another value/)
})
it('should support prerendered catchall-explicit route (single)', async () => {
const html = await renderViaHTTP(next.url, '/catchall-explicit/second')
const $ = cheerio.load(html)
expect(
JSON.parse(cheerio.load(html)('#__NEXT_DATA__').text()).isFallback
).toBe(false)
expect($('#catchall').text()).toMatch(/Hi.*?second/)
})
it('should handle fallback only page correctly HTML', async () => {
const browser = await webdriver(next.url, '/fallback-only/first%2Fpost')
const text = await browser.elementByCss('p').text()
expect(text).toContain('hi fallback')
// wait for fallback data to load
await check(() => browser.elementByCss('p').text(), /Post/)
// check fallback data
const post = await browser.elementByCss('p').text()
const query = JSON.parse(await browser.elementByCss('#query').text())
const params = JSON.parse(await browser.elementByCss('#params').text())
expect(post).toContain('first/post')
expect(params).toEqual({
slug: 'first/post',
})
expect(query).toEqual(params)
})
it('should handle fallback only page correctly data', async () => {
const data = JSON.parse(
await renderViaHTTP(
next.url,
`/_next/data/${next.buildId}/fallback-only/second%2Fpost.json`
)
)
expect(data.pageProps.params).toEqual({
slug: 'second/post',
})
})
it('should 404 for a missing catchall explicit route', async () => {
const res = await fetchViaHTTP(
next.url,
'/catchall-explicit/notreturnedinpaths'
)
expect(res.status).toBe(404)
const html = await res.text()
expect(html).toMatch(/This page could not be found/)
})
it('should 404 for an invalid data url', async () => {
const res = await fetchViaHTTP(next.url, `/_next/data/${next.buildId}`)
expect(res.status).toBe(404)
})
it('should allow rewriting to SSG page with fallback: false', async () => {
const html = await renderViaHTTP(next.url, '/about')
expect(html).toMatch(/About:.*?en/)
})
it("should allow rewriting to SSG page with fallback: 'blocking'", async () => {
const html = await renderViaHTTP(next.url, '/blocked-create')
expect(html).toMatch(/Post:.*?blocked-create/)
})
it('should fetch /_next/data correctly with mismatched href and as', async () => {
const browser = await webdriver(next.url, '/')
if (!dev) {
await browser.eval(() =>
document.querySelector('#to-rewritten-ssg').scrollIntoView()
)
await check(async () => {
const hrefs = await browser.eval(
`Object.keys(window.next.router.sdc)`
)
hrefs.sort()
expect(
hrefs.map((href) =>
new URL(href).pathname.replace(/^\/_next\/data\/[^/]+/, '')
)
).toContainEqual('/lang/en/about.json')
return 'yes'
}, 'yes')
}
await browser.eval('window.beforeNav = "hi"')
await browser.elementByCss('#to-rewritten-ssg').click()
await browser.waitForElementByCss('#about')
expect(await browser.eval('window.beforeNav')).toBe('hi')
expect(await browser.elementByCss('#about').text()).toBe('About: en')
})
it('should not error when rewriting to fallback dynamic SSG page', async () => {
const item = Math.round(Math.random() * 100)
const browser = await webdriver(next.url, `/some-rewrite/${item}`)
await check(
() => browser.elementByCss('p').text(),
new RegExp(`Post: post-${item}`)
)
expect(JSON.parse(await browser.elementByCss('#params').text())).toEqual({
post: `post-${item}`,
})
expect(JSON.parse(await browser.elementByCss('#query').text())).toEqual({
post: `post-${item}`,
})
})
if ((global as any).isNextDev) {
it('should show warning when large amount of page data is returned', async () => {
await renderViaHTTP(next.url, '/large-page-data')
await check(
() => next.cliOutput,
/Warning: data for page "\/large-page-data" is 128 kB, this amount of data can reduce performance/
)
})
it('should not show warning from url prop being returned', async () => {
const urlPropPage = 'pages/url-prop.js'
await next.patchFile(
urlPropPage,
`
export async function getStaticProps() {
return {
props: {
url: 'something'
}
}
}
export default ({ url }) => <p>url: {url}</p>
`
)
const html = await renderViaHTTP(next.url, '/url-prop')
await next.deleteFile(urlPropPage)
expect(next.cliOutput).not.toMatch(
/The prop `url` is a reserved prop in Next.js for legacy reasons and will be overridden on page \/url-prop/
)
expect(html).toMatch(/url:.*?something/)
})
it('should always show fallback for page not in getStaticPaths', async () => {
const html = await renderViaHTTP(next.url, '/blog/post-321')
const $ = cheerio.load(html)
expect(JSON.parse($('#__NEXT_DATA__').text()).isFallback).toBe(true)
// make another request to ensure it still is
const html2 = await renderViaHTTP(next.url, '/blog/post-321')
const $2 = cheerio.load(html2)
expect(JSON.parse($2('#__NEXT_DATA__').text()).isFallback).toBe(true)
})
it('should not show fallback for page in getStaticPaths', async () => {
const html = await renderViaHTTP(next.url, '/blog/post-1')
const $ = cheerio.load(html)
expect(JSON.parse($('#__NEXT_DATA__').text()).isFallback).toBe(false)
// make another request to ensure it's still not
const html2 = await renderViaHTTP(next.url, '/blog/post-1')
const $2 = cheerio.load(html2)
expect(JSON.parse($2('#__NEXT_DATA__').text()).isFallback).toBe(false)
})
it('should never show fallback for page not in getStaticPaths when blocking', async () => {
const html = await renderViaHTTP(
next.url,
'/blocking-fallback-some/asf'
)
const $ = cheerio.load(html)
expect(JSON.parse($('#__NEXT_DATA__').text()).isFallback).toBe(false)
// make another request to ensure it still is
const html2 = await renderViaHTTP(
next.url,
'/blocking-fallback-some/asf'
)
const $2 = cheerio.load(html2)
expect(JSON.parse($2('#__NEXT_DATA__').text()).isFallback).toBe(false)
})
it('should not show fallback for page in getStaticPaths when blocking', async () => {
const html = await renderViaHTTP(next.url, '/blocking-fallback-some/b')
const $ = cheerio.load(html)
expect(JSON.parse($('#__NEXT_DATA__').text()).isFallback).toBe(false)
// make another request to ensure it's still not
const html2 = await renderViaHTTP(next.url, '/blocking-fallback-some/b')
const $2 = cheerio.load(html2)
expect(JSON.parse($2('#__NEXT_DATA__').text()).isFallback).toBe(false)
})
it('should log error in console and browser in dev mode', async () => {
const indexPage = 'pages/index.js'
const origContent = await next.readFile(indexPage)
const browser = await webdriver(next.url, '/')
expect(await browser.elementByCss('p').text()).toMatch(/hello.*?world/)
await next.patchFile(
indexPage,
origContent
.replace('// throw new', 'throw new')
.replace('{/* <div', '<div')
.replace('</div> */}', '</div>')
)
await browser.waitForElementByCss('#after-change')