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import { nextTestSetup } from 'e2e-utils'
import path from 'path'
const { version: nextVersion } = require('next/package.json')
const cacheComponentsEnabled =
process.env.__NEXT_EXPERIMENTAL_CACHE_COMPONENTS === 'true'
const pprEnabled = process.env.__NEXT_EXPERIMENTAL_PPR === 'true'
describe('build-output-prerender', () => {
describe('with a next config file', () => {
describe('without --debug-prerender', () => {
const { next, isTurbopack } = nextTestSetup({
files: path.join(__dirname, 'fixtures/with-config-file'),
skipStart: true,
})
beforeAll(() => next.build())
it('prints only the user-selected experimental flags (and the ones enabled via env variable)', async () => {
if (cacheComponentsEnabled) {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z (Turbopack)
- Experiments (use with caution):
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_CACHE_COMPONENTS\`)
✓ cacheComponents
✓ clientSegmentCache (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ enablePrerenderSourceMaps (enabled by \`experimental.cacheComponents\`)"
`)
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z
- Experiments (use with caution):
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_CACHE_COMPONENTS\`)
✓ cacheComponents
✓ clientSegmentCache (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ enablePrerenderSourceMaps (enabled by \`experimental.cacheComponents\`)"
`)
}
} else if (pprEnabled) {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z (Turbopack)
- Experiments (use with caution):
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ cacheComponents
✓ clientSegmentCache (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ enablePrerenderSourceMaps (enabled by \`experimental.cacheComponents\`)"
`)
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z
- Experiments (use with caution):
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ cacheComponents
✓ clientSegmentCache (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ enablePrerenderSourceMaps (enabled by \`experimental.cacheComponents\`)"
`)
}
} else {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z (Turbopack)
- Experiments (use with caution):
✓ cacheComponents
✓ enablePrerenderSourceMaps (enabled by \`experimental.cacheComponents\`)"
`)
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z
- Experiments (use with caution):
✓ cacheComponents
✓ enablePrerenderSourceMaps (enabled by \`experimental.cacheComponents\`)"
`)
}
}
})
it('shows only a single prerender error with a mangled stack', async () => {
if (isTurbopack) {
// TODO(veil): Why is the location incomplete unless we enable --no-mangling?
expect(getPrerenderOutput(next.cliOutput)).toMatchInlineSnapshot(`
"Error: Route "/client" used \`new Date()\` inside a Client Component without a Suspense boundary above it. See more info here: https://nextjs.org/docs/messages/next-prerender-current-time-client
at c (bundler:///app/client/page.tsx:4:28)
2 |
3 | export default function Page() {
> 4 | return <p>Current time: {new Date().toISOString()}</p>
| ^
5 | }
6 |
To get a more detailed stack trace and pinpoint the issue, try one of the following:
- Start the app in development mode by running \`next dev\`, then open "/client" in your browser to investigate the error.
- Rerun the production build with \`next build --debug-prerender\` to generate better stack traces.
Error occurred prerendering page "/client". Read more: https://nextjs.org/docs/messages/prerender-error
Export encountered an error on /client/page: /client, exiting the build."
`)
} else {
expect(getPrerenderOutput(next.cliOutput)).toMatchInlineSnapshot(`
"Error: Route "/client" used \`new Date()\` inside a Client Component without a Suspense boundary above it. See more info here: https://nextjs.org/docs/messages/next-prerender-current-time-client
at x (<next-dist-dir>)
To get a more detailed stack trace and pinpoint the issue, try one of the following:
- Start the app in development mode by running \`next dev\`, then open "/client" in your browser to investigate the error.
- Rerun the production build with \`next build --debug-prerender\` to generate better stack traces.
Error occurred prerendering page "/client". Read more: https://nextjs.org/docs/messages/prerender-error
Export encountered an error on /client/page: /client, exiting the build."
`)
}
})
})
describe('with --debug-prerender', () => {
const { next, isTurbopack } = nextTestSetup({
files: path.join(__dirname, 'fixtures/with-config-file'),
skipStart: true,
buildArgs: ['--debug-prerender'],
})
beforeAll(() => next.build())
it('prints a warning and the customized experimental flags', async () => {
if (cacheComponentsEnabled) {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z (Turbopack)
- Experiments (use with caution):
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_CACHE_COMPONENTS\`)
✓ cacheComponents
⨯ turbopackMinify (disabled by \`--debug-prerender\`)
✓ serverSourceMaps (enabled by \`--debug-prerender\`)
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ clientSegmentCache (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ enablePrerenderSourceMaps (enabled by \`--debug-prerender\`)"
`)
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z
- Experiments (use with caution):
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_CACHE_COMPONENTS\`)
✓ cacheComponents
✓ serverSourceMaps (enabled by \`--debug-prerender\`)
⨯ serverMinification (disabled by \`--debug-prerender\`)
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ clientSegmentCache (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ enablePrerenderSourceMaps (enabled by \`--debug-prerender\`)"
`)
}
} else if (pprEnabled) {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z (Turbopack)
- Experiments (use with caution):
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ cacheComponents
⨯ turbopackMinify (disabled by \`--debug-prerender\`)
✓ serverSourceMaps (enabled by \`--debug-prerender\`)
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ clientSegmentCache (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ enablePrerenderSourceMaps (enabled by \`--debug-prerender\`)"
`)
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z
- Experiments (use with caution):
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ cacheComponents
✓ serverSourceMaps (enabled by \`--debug-prerender\`)
⨯ serverMinification (disabled by \`--debug-prerender\`)
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ clientSegmentCache (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ enablePrerenderSourceMaps (enabled by \`--debug-prerender\`)"
`)
}
} else {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z (Turbopack)
- Experiments (use with caution):
✓ cacheComponents
⨯ turbopackMinify (disabled by \`--debug-prerender\`)
✓ serverSourceMaps (enabled by \`--debug-prerender\`)
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ enablePrerenderSourceMaps (enabled by \`--debug-prerender\`)"
`)
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z
- Experiments (use with caution):
✓ cacheComponents
✓ serverSourceMaps (enabled by \`--debug-prerender\`)
⨯ serverMinification (disabled by \`--debug-prerender\`)
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ enablePrerenderSourceMaps (enabled by \`--debug-prerender\`)"
`)
}
}
})
it('shows all prerender errors with readable stacks and code frames', async () => {
expect(getPrerenderOutput(next.cliOutput)).toMatchInlineSnapshot(`
"Error: Route "/client" used \`new Date()\` inside a Client Component without a Suspense boundary above it. See more info here: https://nextjs.org/docs/messages/next-prerender-current-time-client
at Page (bundler:///app/client/page.tsx:4:28)
2 |
3 | export default function Page() {
> 4 | return <p>Current time: {new Date().toISOString()}</p>
| ^
5 | }
6 |
To get a more detailed stack trace and pinpoint the issue, start the app in development mode by running \`next dev\`, then open "/client" in your browser to investigate the error.
Error occurred prerendering page "/client". Read more: https://nextjs.org/docs/messages/prerender-error
Error: Route "/server" used \`Math.random()\` outside of \`"use cache"\` and without explicitly calling \`await connection()\` beforehand. See more info here: https://nextjs.org/docs/messages/next-prerender-random
at Page (bundler:///app/server/page.tsx:13:27)
11 | await cachedDelay()
12 |
> 13 | return <p>Random: {Math.random()}</p>
| ^
14 | }
15 |
To get a more detailed stack trace and pinpoint the issue, start the app in development mode by running \`next dev\`, then open "/server" in your browser to investigate the error.
Error occurred prerendering page "/server". Read more: https://nextjs.org/docs/messages/prerender-error
> Export encountered errors on following paths:
/client/page: /client
/server/page: /server"
`)
})
})
})
describe('without a next config file', () => {
describe('without --debug-prerender', () => {
const { next, isTurbopack } = nextTestSetup({
files: path.join(__dirname, 'fixtures/without-config-file'),
skipStart: true,
})
beforeAll(() => next.build())
it('prints no experimental flags (unless enabled via env variable)', async () => {
if (cacheComponentsEnabled) {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z (Turbopack)
- Experiments (use with caution):
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_CACHE_COMPONENTS\`)
✓ cacheComponents (enabled by \`__NEXT_EXPERIMENTAL_CACHE_COMPONENTS\`)
✓ clientSegmentCache (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ enablePrerenderSourceMaps (enabled by \`experimental.cacheComponents\`)"
`)
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z
- Experiments (use with caution):
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_CACHE_COMPONENTS\`)
✓ cacheComponents (enabled by \`__NEXT_EXPERIMENTAL_CACHE_COMPONENTS\`)
✓ clientSegmentCache (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ enablePrerenderSourceMaps (enabled by \`experimental.cacheComponents\`)"
`)
}
} else if (pprEnabled) {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z (Turbopack)
- Experiments (use with caution):
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ clientSegmentCache (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)"
`)
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z
- Experiments (use with caution):
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ clientSegmentCache (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)"
`)
}
} else {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(
`"▲ Next.js x.y.z (Turbopack)"`
)
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(
`"▲ Next.js x.y.z"`
)
}
}
})
})
describe('with --debug-prerender', () => {
const { next, isTurbopack } = nextTestSetup({
files: path.join(__dirname, 'fixtures/without-config-file'),
skipStart: true,
buildArgs: ['--debug-prerender'],
})
beforeAll(() => next.build())
it('prints a warning and the customized experimental flags', async () => {
if (cacheComponentsEnabled) {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z (Turbopack)
- Experiments (use with caution):
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_CACHE_COMPONENTS\`)
✓ cacheComponents (enabled by \`__NEXT_EXPERIMENTAL_CACHE_COMPONENTS\`)
⨯ turbopackMinify (disabled by \`--debug-prerender\`)
✓ serverSourceMaps (enabled by \`--debug-prerender\`)
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ clientSegmentCache (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ enablePrerenderSourceMaps (enabled by \`--debug-prerender\`)"
`)
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z
- Experiments (use with caution):
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_CACHE_COMPONENTS\`)
✓ cacheComponents (enabled by \`__NEXT_EXPERIMENTAL_CACHE_COMPONENTS\`)
✓ serverSourceMaps (enabled by \`--debug-prerender\`)
⨯ serverMinification (disabled by \`--debug-prerender\`)
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ clientSegmentCache (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ enablePrerenderSourceMaps (enabled by \`--debug-prerender\`)"
`)
}
} else if (pprEnabled) {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z (Turbopack)
- Experiments (use with caution):
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
⨯ turbopackMinify (disabled by \`--debug-prerender\`)
✓ serverSourceMaps (enabled by \`--debug-prerender\`)
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ clientSegmentCache (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ enablePrerenderSourceMaps (enabled by \`--debug-prerender\`)"
`)
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z
- Experiments (use with caution):
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ serverSourceMaps (enabled by \`--debug-prerender\`)
⨯ serverMinification (disabled by \`--debug-prerender\`)
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ clientSegmentCache (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
✓ enablePrerenderSourceMaps (enabled by \`--debug-prerender\`)"
`)
}
} else {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z (Turbopack)
- Experiments (use with caution):
⨯ turbopackMinify (disabled by \`--debug-prerender\`)
✓ serverSourceMaps (enabled by \`--debug-prerender\`)
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ enablePrerenderSourceMaps (enabled by \`--debug-prerender\`)"
`)
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z
- Experiments (use with caution):
✓ serverSourceMaps (enabled by \`--debug-prerender\`)
⨯ serverMinification (disabled by \`--debug-prerender\`)
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ enablePrerenderSourceMaps (enabled by \`--debug-prerender\`)"
`)
}
}
})
})
})
})
function getPreambleOutput(cliOutput: string): string {
const lines: string[] = []
for (const line of cliOutput.split('\n')) {
if (line.includes('Creating an optimized production build')) {
break
}
lines.push(line.replace(nextVersion, 'x.y.z'))
}
return lines.join('\n').trim()
}
function getPrerenderOutput(cliOutput: string): string {
let foundPrerenderingLine = false
const lines: string[] = []
for (const line of cliOutput.split('\n')) {
if (line.includes('Collecting page data')) {
foundPrerenderingLine = true
continue
}
if (line.includes('Next.js build worker exited')) {
break
}
if (foundPrerenderingLine && !line.includes('Generating static pages')) {
lines.push(
line
.replace(/at \w+ \(.next[^)]+\)/, 'at x (<next-dist-dir>)')
// TODO(veil): Bundler protocols should not appear in stackframes.
.replace('webpack:///', 'bundler:///')
.replace('turbopack:///[project]/', 'bundler:///')
)
}
}
return lines.join('\n').trim()
}
|