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index.test.js
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index.test.js
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/* eslint-env jest */
/* global jasmine */
import cheerio from 'cheerio'
import cookie from 'cookie'
import fs from 'fs-extra'
import {
fetchViaHTTP,
findPort,
initNextServerScript,
killApp,
nextBuild,
nextStart,
renderViaHTTP,
} from 'next-test-utils'
import webdriver from 'next-webdriver'
import os from 'os'
import { join } from 'path'
import qs from 'querystring'
jasmine.DEFAULT_TIMEOUT_INTERVAL = 1000 * 60 * 2
const appDir = join(__dirname, '..')
const nextConfigPath = join(appDir, 'next.config.js')
async function getBuildId() {
return fs.readFile(join(appDir, '.next', 'BUILD_ID'), 'utf8')
}
function getData(html) {
const $ = cheerio.load(html)
const nextData = $('#__NEXT_DATA__')
const preEl = $('#props-pre')
return { nextData: JSON.parse(nextData.html()), pre: preEl.text() }
}
function runTests(startServer = nextStart) {
it('should compile successfully', async () => {
await fs.remove(join(appDir, '.next'))
const { code, stdout } = await nextBuild(appDir, [], {
stdout: true,
})
expect(code).toBe(0)
expect(stdout).toMatch(/Compiled successfully/)
})
let appPort, app
it('should start production application', async () => {
appPort = await findPort()
app = await startServer(appDir, appPort)
})
it('should return prerendered page on first request', async () => {
const html = await renderViaHTTP(appPort, '/')
const { nextData, pre } = getData(html)
expect(nextData).toMatchObject({ isFallback: false })
expect(pre).toBe('undefined and undefined')
})
it('should return prerendered page on second request', async () => {
const html = await renderViaHTTP(appPort, '/')
const { nextData, pre } = getData(html)
expect(nextData).toMatchObject({ isFallback: false })
expect(pre).toBe('undefined and undefined')
})
let previewCookieString
it('should enable preview mode', async () => {
const res = await fetchViaHTTP(appPort, '/api/preview', { lets: 'goooo' })
expect(res.status).toBe(200)
const cookies = res.headers
.get('set-cookie')
.split(',')
.map(cookie.parse)
expect(cookies.length).toBe(2)
expect(cookies[0]).toMatchObject({ Path: '/', SameSite: 'Strict' })
expect(cookies[0]).toHaveProperty('__prerender_bypass')
expect(cookies[0]).not.toHaveProperty('Max-Age')
expect(cookies[1]).toMatchObject({ Path: '/', SameSite: 'Strict' })
expect(cookies[1]).toHaveProperty('__next_preview_data')
expect(cookies[1]).not.toHaveProperty('Max-Age')
previewCookieString =
cookie.serialize('__prerender_bypass', cookies[0].__prerender_bypass) +
'; ' +
cookie.serialize('__next_preview_data', cookies[1].__next_preview_data)
})
it('should not return fallback page on preview request', async () => {
const res = await fetchViaHTTP(
appPort,
'/',
{},
{ headers: { Cookie: previewCookieString } }
)
const html = await res.text()
const { nextData, pre } = getData(html)
expect(res.headers.get('cache-control')).toBe(
'private, no-cache, no-store, max-age=0, must-revalidate'
)
expect(nextData).toMatchObject({ isFallback: false })
expect(pre).toBe('true and {"lets":"goooo"}')
})
it('should return correct caching headers for data preview request', async () => {
const res = await fetchViaHTTP(
appPort,
`/_next/data/${encodeURI(await getBuildId())}/index.json`,
{},
{ headers: { Cookie: previewCookieString } }
)
const json = await res.json()
expect(res.headers.get('cache-control')).toBe(
'private, no-cache, no-store, max-age=0, must-revalidate'
)
expect(json).toMatchObject({
pageProps: {
preview: true,
previewData: { lets: 'goooo' },
},
})
})
it('should return cookies to be expired on reset request', async () => {
const res = await fetchViaHTTP(
appPort,
'/api/reset',
{},
{ headers: { Cookie: previewCookieString } }
)
expect(res.status).toBe(200)
const cookies = res.headers
.get('set-cookie')
.replace(/(=\w{3}),/g, '$1')
.split(',')
.map(cookie.parse)
expect(cookies.length).toBe(2)
expect(cookies[0]).toMatchObject({
Path: '/',
SameSite: 'Strict',
Expires: 'Thu 01 Jan 1970 00:00:00 GMT',
})
expect(cookies[0]).toHaveProperty('__prerender_bypass')
expect(cookies[0]).not.toHaveProperty('Max-Age')
expect(cookies[1]).toMatchObject({
Path: '/',
SameSite: 'Strict',
Expires: 'Thu 01 Jan 1970 00:00:00 GMT',
})
expect(cookies[1]).toHaveProperty('__next_preview_data')
expect(cookies[1]).not.toHaveProperty('Max-Age')
})
/** @type import('next-webdriver').Chain */
let browser
it('should start the client-side browser', async () => {
browser = await webdriver(
appPort,
'/api/preview?' + qs.stringify({ client: 'mode' })
)
})
it('should fetch preview data', async () => {
await browser.get(`http://localhost:${appPort}/`)
await browser.waitForElementByCss('#props-pre')
// expect(await browser.elementById('props-pre').text()).toBe('Has No Props')
// await new Promise(resolve => setTimeout(resolve, 2000))
expect(await browser.elementById('props-pre').text()).toBe(
'true and {"client":"mode"}'
)
})
it('should fetch prerendered data', async () => {
await browser.get(`http://localhost:${appPort}/api/reset`)
await browser.get(`http://localhost:${appPort}/`)
await browser.waitForElementByCss('#props-pre')
expect(await browser.elementById('props-pre').text()).toBe(
'undefined and undefined'
)
})
afterAll(async () => {
await browser.close()
await killApp(app)
})
}
const startServerlessEmulator = async (dir, port) => {
const scriptPath = join(dir, 'server.js')
const env = Object.assign(
{},
{ ...process.env },
{ PORT: port, BUILD_ID: await getBuildId() }
)
return initNextServerScript(scriptPath, /ready on/i, env)
}
describe('Prerender Preview Mode', () => {
describe('Server Mode', () => {
beforeAll(async () => {
await fs.remove(nextConfigPath)
})
runTests()
})
describe('Serverless Mode', () => {
beforeAll(async () => {
await fs.writeFile(
nextConfigPath,
`module.exports = { target: 'experimental-serverless-trace' }` + os.EOL
)
})
afterAll(async () => {
await fs.remove(nextConfigPath)
})
runTests()
})
describe('Emulated Serverless Mode', () => {
beforeAll(async () => {
await fs.writeFile(
nextConfigPath,
`module.exports = { target: 'experimental-serverless-trace' }` + os.EOL
)
})
afterAll(async () => {
await fs.remove(nextConfigPath)
})
runTests(startServerlessEmulator)
})
})