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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')
})
}
)
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