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Ensure next-server prepare only execute once
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huozhi committed Aug 7, 2024
1 parent 070159a commit ab9c14b
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Original file line number Diff line number Diff line change
@@ -1,5 +1,11 @@
let count = 0

export function register() {
if (process.env.NEXT_RUNTIME === 'nodejs') {
if (count > 0) {
throw new Error('duplicated-register')
}
console.log('register-log')
count++
}
}
Original file line number Diff line number Diff line change
Expand Up @@ -14,4 +14,10 @@ describe('instrumentation-hook - register-once', () => {
await next.fetch('/foo')
expect(next.cliOutput).toIncludeRepeated('register-log', 1)
})

it('should not error when concurrent requests are made', async () => {
await Promise.all([next.fetch('/foo'), next.fetch('/foo')])
expect(next.cliOutput).toIncludeRepeated('register-log', 1)
expect(next.cliOutput).not.toInclude('duplicated-register')
})
})

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