/
index.test.js
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/
index.test.js
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/* eslint-env jest */
import fs from 'fs-extra'
import { join } from 'path'
import webdriver from 'next-webdriver'
import { killApp, findPort, launchApp, check } from 'next-test-utils'
const appDir = join(__dirname, '../')
const appPage = join(appDir, 'pages/_app.js')
const indexPage = join(appDir, 'pages/index.js')
const documentPage = join(appDir, 'pages/_document.js')
let appPort
let app
describe('_app removal HMR', () => {
beforeAll(async () => {
appPort = await findPort()
app = await launchApp(appDir, appPort)
})
afterAll(() => killApp(app))
it('should HMR when _app is removed', async () => {
let indexContent = await fs.readFile(indexPage)
try {
const browser = await webdriver(appPort, '/')
const html = await browser.eval('document.documentElement.innerHTML')
expect(html).toContain('custom _app')
await fs.rename(appPage, appPage + '.bak')
await check(async () => {
const html = await browser.eval('document.documentElement.innerHTML')
return html.includes('index page') && !html.includes('custom _app')
? 'success'
: html
}, 'success')
await fs.writeFile(
indexPage,
`
export default function Page() {
return <p>index page updated</p>
}
`
)
await check(async () => {
const html = await browser.eval('document.documentElement.innerHTML')
return html.includes('index page updated') &&
!html.includes('custom _app')
? 'success'
: html
}, 'success')
await fs.rename(appPage + '.bak', appPage)
await check(async () => {
const html = await browser.eval('document.documentElement.innerHTML')
return html.includes('index page updated') &&
html.includes('custom _app')
? 'success'
: html
}, 'success')
} finally {
await fs.writeFile(indexPage, indexContent)
if (await fs.pathExists(appPage + '.bak')) {
await fs.rename(appPage + '.bak', appPage)
}
}
})
it('should HMR when _document is removed', async () => {
let indexContent = await fs.readFile(indexPage)
try {
const browser = await webdriver(appPort, '/')
const html = await browser.eval('document.documentElement.innerHTML')
expect(html).toContain('custom _document')
await fs.rename(documentPage, documentPage + '.bak')
await check(async () => {
const html = await browser.eval('document.documentElement.innerHTML')
return html.includes('index page') && !html.includes('custom _document')
? 'success'
: html
}, 'success')
await fs.writeFile(
indexPage,
`
export default function Page() {
return <p>index page updated</p>
}
`
)
await check(async () => {
const html = await browser.eval('document.documentElement.innerHTML')
return html.includes('index page updated') &&
!html.includes('custom _document')
? 'success'
: html
}, 'success')
await fs.rename(documentPage + '.bak', documentPage)
await check(async () => {
const html = await browser.eval('document.documentElement.innerHTML')
return html.includes('index page updated') &&
html.includes('custom _document')
? 'success'
: html
}, 'success')
} finally {
await fs.writeFile(indexPage, indexContent)
if (await fs.pathExists(documentPage + '.bak')) {
await fs.rename(documentPage + '.bak', documentPage)
}
}
})
})