Add typechecking test for all entrypoints

[eps1lon]

Couldn't find existing tests for checking that all entrypoints have working types. 3 entrypoints currently don't typecheck with skipLibCheck:

• next/jest: Just need to declare an explicit peer dependency on @jest/types and install that to validate
• next/babel: References next/dist/compiled/babel/core which re-exports via misc.d.ts from babel/core. Since misc.d.ts is not published, installing @babel/core wouldn't be sufficient. Need to check how to fix.
• next/web-vitals: Unclear how to fix. Tracking in missing Metric type in useReportWebVitals #59903

The main point here was to write a regression test before we land #64043 which needs more @internal annotations.

Closes NEXT-3105

[ijjk]

Tests Passed

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General

	vercel/next.js canary	vercel/next.js sebbie/typechecking-test	Change
buildDuration	13.8s	13.8s	N/A
buildDurationCached	8.4s	6.1s	N/A
nodeModulesSize	199 MB	199 MB	✓
nextStartRea..uration (ms)	397ms	404ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	vercel/next.js sebbie/typechecking-test	Change
2453-HASH.js gzip	31.4 kB	31.4 kB	N/A
3304.HASH.js gzip	181 B	181 B	✓
3f784ff6-HASH.js gzip	53.7 kB	53.7 kB	✓
8299-HASH.js gzip	5.1 kB	5.1 kB	N/A
framework-HASH.js gzip	45.2 kB	45.2 kB	✓
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main-HASH.js gzip	32.2 kB	32.2 kB	N/A
webpack-HASH.js gzip	1.68 kB	1.68 kB	N/A
Overall change	99 kB	99 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js sebbie/typechecking-test	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

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Client Build Manifests

	vercel/next.js canary	vercel/next.js sebbie/typechecking-test	Change
_buildManifest.js gzip	483 B	485 B	N/A
Overall change	0 B	0 B	✓

Rendered Page Sizes

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index.html gzip	528 B	528 B	✓
link.html gzip	541 B	540 B	N/A
withRouter.html gzip	524 B	522 B	N/A
Overall change	528 B	528 B	✓

Edge SSR bundle Size

	vercel/next.js canary	vercel/next.js sebbie/typechecking-test	Change
edge-ssr.js gzip	95.6 kB	95.6 kB	N/A
page.js gzip	3.06 kB	3.06 kB	N/A
Overall change	0 B	0 B	✓

Middleware size

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middleware.js gzip	25.5 kB	25.5 kB	N/A
edge-runtime..pack.js gzip	839 B	839 B	✓
Overall change	839 B	839 B	✓

Next Runtimes

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app-route-tu..prod.js gzip	14.9 kB	14.9 kB	✓
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app-route.ru..prod.js gzip	14.9 kB	14.9 kB	✓
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pages-api.ru..prod.js gzip	9.55 kB	9.55 kB	✓
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pages.runtim..prod.js gzip	22.5 kB	22.5 kB	✓
server.runti..prod.js gzip	51.3 kB	51.3 kB	✓
Overall change	948 kB	948 kB	✓

build cache Overall increase ⚠️

	vercel/next.js canary	vercel/next.js sebbie/typechecking-test	Change
0.pack gzip	1.58 MB	1.58 MB	⚠️ +989 B
index.pack gzip	106 kB	106 kB	N/A
Overall change	1.58 MB	1.58 MB	⚠️ +989 B

Diff details

Diff for middleware.js

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Commit: 9dd8af4

[huozhi]

Nice coverage!

[huozhi]

this file is :interesting: 👍