| import { nextTestSetup } from 'e2e-utils' | |
| import { fetchViaHTTP } from 'next-test-utils' | |
| ;(process.env.IS_TURBOPACK_TEST ? describe.skip : describe)( | |
| 'Slow Module Detection', | |
| () => { | |
| const { next } = nextTestSetup({ | |
| files: __dirname, | |
| overrideFiles: { | |
| 'utils/slow-module.js': ` | |
| // This module is intentionally made complex to trigger slow compilation | |
| ${Array(2000) | |
| .fill(0) | |
| .map( | |
| (_, i) => ` | |
| export const value${i} = ${JSON.stringify( | |
| Array(100).fill(`some-long-string-${i}`).join('') | |
| )} | |
| ` | |
| ) | |
| .join('\n')} | |
| `, | |
| }, | |
| }) | |
| it('should detect slow modules in webpack mode', async () => { | |
| let logs = '' | |
| next.on('stdout', (log) => { | |
| logs += log | |
| }) | |
| // Trigger a compilation by making a request | |
| await fetchViaHTTP(next.url, '/') | |
| // Wait for compilation to complete and check logs | |
| await new Promise((resolve) => setTimeout(resolve, 1000)) | |
| // Verify slow module detection output | |
| expect(logs).toContain('🐌 Detected slow modules while compiling client:') | |
| expect(logs).toContain('./utils/slow-module.js') | |
| }) | |
| } | |
| ) | |