| import { createNext } from 'e2e-utils' |
| import { NextInstance } from 'e2e-utils' |
|
|
| |
| ;(process.env.IS_TURBOPACK_TEST ? describe.skip : describe)( |
| 'Disable fallback polyfills', |
| () => { |
| let next: NextInstance |
|
|
| function getFirstLoadSize(output: string) { |
| const firstLoadRe = |
| /○ \/.*? (?<size>\d.*?) [^\d]{2} (?<firstLoad>\d.*?) [^\d]{2}/ |
| return Number(output.match(firstLoadRe).groups.firstLoad) |
| } |
|
|
| beforeAll(async () => { |
| next = await createNext({ |
| files: { |
| 'pages/index.js': ` |
| import { useEffect } from 'react' |
| import crypto from 'crypto' |
| |
| export default function Page() { |
| useEffect(() => { |
| crypto; |
| }, []) |
| return <p>hello world</p> |
| } |
| `, |
| }, |
| dependencies: { |
| axios: '0.27.2', |
| }, |
| }) |
| await next.stop() |
| }) |
| afterAll(() => next.destroy()) |
|
|
| it('Fallback polyfills added by default', async () => { |
| expect(getFirstLoadSize(next.cliOutput)).not.toBeLessThan(200) |
| }) |
|
|
| it('Reduced bundle size when polyfills are disabled', async () => { |
| await next.patchFile( |
| 'next.config.js', |
| `module.exports = { |
| experimental: { |
| fallbackNodePolyfills: false |
| } |
| }` |
| ) |
| await next.start() |
| await next.stop() |
|
|
| expect(getFirstLoadSize(next.cliOutput)).toBeLessThan(200) |
| }) |
|
|
| it('Pass build without error if non-polyfilled module is unreachable', async () => { |
| |
| |
| await next.patchFile( |
| 'pages/index.js', |
| `import axios from 'axios' |
| import { useEffect } from 'react' |
| |
| export default function Home() { |
| useEffect(() => { |
| axios.get('/api') |
| }, []) |
| |
| return "hello world" |
| }` |
| ) |
|
|
| await expect(next.start()).not.toReject() |
| }) |
| } |
| ) |
|
|
