Files
Zack TannerandGitHub 1dffd3c02a remove HMR polling in favor of more targeted events (#54406)
This removes the client-side polling logic that we're doing on every HMR
tick in favor of events like `addedPage` / `removedPage`. It was leading
to a lot of misc issues & confusion surrounding error/404 pages being
polled needlessly.

Instead this updates `addedPage` / `removedPage` to be emitted on the
server, so that we can leverage those hooks to reload when necessary.

Fixes #10024
Fixes #51132
Closes NEXT-1372
related discussion: https://github.com/vercel/next.js/discussions/40000

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2023-08-23 16:25:57 -07:00

97 lines
3.0 KiB
TypeScript

import { createNextDescribe } from 'e2e-utils'
import { check, waitFor } from 'next-test-utils'
const envFile = '.env.development.local'
createNextDescribe(
`app-dir-hmr`,
{
files: __dirname,
},
({ next }) => {
describe('filesystem changes', () => {
it('should not continously poll when hitting a not found page', async () => {
let requestCount = 0
const browser = await next.browser('/does-not-exist', {
beforePageLoad(page) {
page.on('request', (request) => {
const url = new URL(request.url())
if (url.pathname === '/does-not-exist') {
requestCount++
}
})
},
})
const body = await browser.elementByCss('body').text()
expect(body).toContain('404')
await waitFor(3000)
expect(requestCount).toBe(1)
})
it('should not break when renaming a folder', async () => {
const browser = await next.browser('/folder')
const text = await browser.elementByCss('h1').text()
expect(text).toBe('Hello')
// Rename folder
await next.renameFolder('app/folder', 'app/folder-renamed')
try {
// Should be 404 in a few seconds
await check(async () => {
const body = await browser.elementByCss('body').text()
expect(body).toContain('404')
return 'success'
}, 'success')
// The new page should be rendered
const newHTML = await next.render('/folder-renamed')
expect(newHTML).toContain('Hello')
} finally {
// Rename it back
await next.renameFolder('app/folder-renamed', 'app/folder')
}
})
it('should update server components pages when env files is changed (nodejs)', async () => {
const envContent = await next.readFile(envFile)
const browser = await next.browser('/env/node')
expect(await browser.elementByCss('p').text()).toBe('mac')
await next.patchFile(envFile, 'MY_DEVICE="ipad"')
try {
await check(async () => {
expect(await browser.elementByCss('p').text()).toBe('ipad')
return 'success'
}, /success/)
} finally {
await next.patchFile(envFile, envContent)
}
})
it('should update server components pages when env files is changed (edge)', async () => {
const envContent = await next.readFile(envFile)
const browser = await next.browser('/env/edge')
expect(await browser.elementByCss('p').text()).toBe('mac')
await next.patchFile(envFile, 'MY_DEVICE="ipad"')
try {
await check(async () => {
expect(await browser.elementByCss('p').text()).toBe('ipad')
return 'success'
}, /success/)
} finally {
await next.patchFile(envFile, envContent)
}
})
it('should have no unexpected action error for hmr', async () => {
expect(next.cliOutput).not.toContain('Unexpected action')
})
})
}
)