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import { nextTestSetup } from 'e2e-utils'
describe('Dynamic Code Evaluation (DCE)', () => {
const { next } = nextTestSetup({
skipStart: true,
dependencies: { 'function-bind': 'latest' },
files: __dirname,
})
// This test is basically for https://github.com/vercel/next.js/discussions/51910
// to make sure that some libs that we know are using `eval` but don't break
// because it will never run into that condition, but still can't to be DCE'd.
it('should not fail when "function-bind" package is used', async () => {
const { exitCode, cliOutput } = await next.build()
expect(exitCode).toBe(0)
expect(cliOutput).not.toContain(
`Dynamic Code Evaluation (e. g. 'eval', 'new Function', 'WebAssembly.compile') not allowed in Edge Runtime`
)
})
;(process.env.IS_TURBOPACK_TEST ? it.skip : it)(
"should show the user's import trace",
async () => {
await next.patchFile(
'middleware.js',
`
import { foo } from './lib/foo'
export function middleware() {
foo()
}`
)
const { exitCode, cliOutput } = await next.build()
// eslint-disable-next-line jest/no-standalone-expect
expect(exitCode).toBe(1)
// eslint-disable-next-line jest/no-standalone-expect
expect(cliOutput).toContain(`./lib/foo.js
Dynamic Code Evaluation (e. g. 'eval', 'new Function', 'WebAssembly.compile') not allowed in Edge Runtime
Used by bar`)
// eslint-disable-next-line jest/no-standalone-expect
expect(cliOutput).toContain(`Import trace for requested module:
./lib/foo.js
./middleware.js`)
}
)
})
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