fix(next/jest): do not watch .next folder

[balazsorban44]

jest --watch looks for changes in dotfiles and folders by default, which resulted in the tests being re-run when navigating between pages with next dev.

Fixes #32650

Bug

• Related issues linked using fixes #number
• Integration tests added
• Errors have helpful link attached, see contributing.md

Feature

• Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
• Related issues linked using fixes #number
• Integration tests added
• Documentation added
• Telemetry added. In case of a feature if it's used or not.
• Errors have helpful link attached, see contributing.md

Documentation / Examples

• Make sure the linting passes by running yarn lint

[ijjk]

Stats from current PR

Default Build (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	vercel/next.js fix/ignore-dot-next-jest	Change
buildDuration	19s	18.9s	-30ms
buildDurationCached	3.5s	3.5s	⚠️ +20ms
nodeModulesSize	348 MB	348 MB	⚠️ +387 B

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	vercel/next.js fix/ignore-dot-next-jest	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.057	3.087	⚠️ +0.03
/ avg req/sec	817.89	809.82	⚠️ -8.07
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.405	1.414	⚠️ +0.01
/error-in-render avg req/sec	1779.35	1768.62	⚠️ -10.73

Client Bundles (main, webpack, commons)

	vercel/next.js canary	vercel/next.js fix/ignore-dot-next-jest	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.2 kB	42.2 kB	✓
main-HASH.js gzip	30.2 kB	30.2 kB	✓
webpack-HASH.js gzip	1.45 kB	1.45 kB	✓
Overall change	74 kB	74 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js fix/ignore-dot-next-jest	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js fix/ignore-dot-next-jest	Change
_app-HASH.js gzip	1.37 kB	1.37 kB	✓
_error-HASH.js gzip	194 B	194 B	✓
amp-HASH.js gzip	312 B	312 B	✓
css-HASH.js gzip	326 B	326 B	✓
dynamic-HASH.js gzip	2.37 kB	2.37 kB	✓
head-HASH.js gzip	350 B	350 B	✓
hooks-HASH.js gzip	919 B	919 B	✓
image-HASH.js gzip	4.73 kB	4.73 kB	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	2.13 kB	2.13 kB	✓
routerDirect..HASH.js gzip	321 B	321 B	✓
script-HASH.js gzip	383 B	383 B	✓
withRouter-HASH.js gzip	318 B	318 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	14.1 kB	14.1 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js fix/ignore-dot-next-jest	Change
_buildManifest.js gzip	460 B	460 B	✓
Overall change	460 B	460 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js fix/ignore-dot-next-jest	Change
index.html gzip	533 B	533 B	✓
link.html gzip	547 B	547 B	✓
withRouter.html gzip	527 B	527 B	✓
Overall change	1.61 kB	1.61 kB	✓

---

Default Build with SWC (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	vercel/next.js fix/ignore-dot-next-jest	Change
buildDuration	20.3s	20.4s	⚠️ +99ms
buildDurationCached	3.5s	3.5s	⚠️ +28ms
nodeModulesSize	348 MB	348 MB	⚠️ +387 B

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	vercel/next.js fix/ignore-dot-next-jest	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.008	3.013	0
/ avg req/sec	831.01	829.73	⚠️ -1.28
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.385	1.441	⚠️ +0.06
/error-in-render avg req/sec	1805.59	1734.32	⚠️ -71.27

Client Bundles (main, webpack, commons)

	vercel/next.js canary	vercel/next.js fix/ignore-dot-next-jest	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.3 kB	42.3 kB	✓
main-HASH.js gzip	30.3 kB	30.3 kB	✓
webpack-HASH.js gzip	1.44 kB	1.44 kB	✓
Overall change	74.3 kB	74.3 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js fix/ignore-dot-next-jest	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js fix/ignore-dot-next-jest	Change
_app-HASH.js gzip	1.35 kB	1.35 kB	✓
_error-HASH.js gzip	180 B	180 B	✓
amp-HASH.js gzip	305 B	305 B	✓
css-HASH.js gzip	321 B	321 B	✓
dynamic-HASH.js gzip	2.36 kB	2.36 kB	✓
head-HASH.js gzip	342 B	342 B	✓
hooks-HASH.js gzip	906 B	906 B	✓
image-HASH.js gzip	4.75 kB	4.75 kB	✓
index-HASH.js gzip	256 B	256 B	✓
link-HASH.js gzip	2.19 kB	2.19 kB	✓
routerDirect..HASH.js gzip	314 B	314 B	✓
script-HASH.js gzip	375 B	375 B	✓
withRouter-HASH.js gzip	309 B	309 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	14.1 kB	14.1 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js fix/ignore-dot-next-jest	Change
_buildManifest.js gzip	459 B	459 B	✓
Overall change	459 B	459 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js fix/ignore-dot-next-jest	Change
index.html gzip	532 B	532 B	✓
link.html gzip	546 B	546 B	✓
withRouter.html gzip	526 B	526 B	✓
Overall change	1.6 kB	1.6 kB	✓

Commit: 7ee36b9

[ijjk]

Are there other folders we should ignore as well if no dot files/folders are ignored by default?

[balazsorban44]

Ones that we should ignore by default? Don't think so.