Add stitches and material-ui tests for new link behavior + fix TypeScript types when imported

[timneutkens]

Adds additional tests for material-ui and stitches based on questions in the Twitter thread.

Fixes TypeScript types when LinkProps is imported and used in combination with <button>, added a TODO to change this at a later point when the new behavior is the default instead of opt-in.

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 (Increase detected ⚠️)

General Overall decrease ✓

	vercel/next.js canary	timneutkens/next.js add/more-link-tests	Change
buildDuration	16.5s	16s	-452ms
buildDurationCached	6.2s	6.4s	⚠️ +143ms
nodeModulesSize	481 MB	481 MB	-5 B

Page Load Tests Overall increase ✓

	vercel/next.js canary	timneutkens/next.js add/more-link-tests	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.247	3.258	⚠️ +0.01
/ avg req/sec	769.86	767.42	⚠️ -2.44
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.368	1.352	-0.02
/error-in-render avg req/sec	1827.13	1848.61	+21.48

Client Bundles (main, webpack)

	vercel/next.js canary	timneutkens/next.js add/more-link-tests	Change
925.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42 kB	42 kB	✓
main-HASH.js gzip	28.6 kB	28.6 kB	✓
webpack-HASH.js gzip	1.44 kB	1.44 kB	✓
Overall change	72.3 kB	72.3 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	timneutkens/next.js add/more-link-tests	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	timneutkens/next.js add/more-link-tests	Change
_app-HASH.js gzip	1.36 kB	1.36 kB	✓
_error-HASH.js gzip	192 B	192 B	✓
amp-HASH.js gzip	309 B	309 B	✓
css-HASH.js gzip	327 B	327 B	✓
dynamic-HASH.js gzip	3.04 kB	3.04 kB	✓
head-HASH.js gzip	378 B	378 B	✓
hooks-HASH.js gzip	920 B	920 B	✓
image-HASH.js gzip	5.73 kB	5.73 kB	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	2.63 kB	2.63 kB	✓
routerDirect..HASH.js gzip	320 B	320 B	✓
script-HASH.js gzip	392 B	392 B	✓
withRouter-HASH.js gzip	319 B	319 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	16.3 kB	16.3 kB	✓

Client Build Manifests

	vercel/next.js canary	timneutkens/next.js add/more-link-tests	Change
_buildManifest.js gzip	460 B	460 B	✓
Overall change	460 B	460 B	✓

Rendered Page Sizes

	vercel/next.js canary	timneutkens/next.js add/more-link-tests	Change
index.html gzip	533 B	533 B	✓
link.html gzip	546 B	546 B	✓
withRouter.html gzip	526 B	526 B	✓
Overall change	1.6 kB	1.6 kB	✓

---

Default Build with SWC (Decrease detected ✓)

General Overall decrease ✓

	vercel/next.js canary	timneutkens/next.js add/more-link-tests	Change
buildDuration	18.4s	18.5s	⚠️ +130ms
buildDurationCached	6.2s	6.2s	-84ms
nodeModulesSize	481 MB	481 MB	-5 B

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	timneutkens/next.js add/more-link-tests	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.278	3.29	⚠️ +0.01
/ avg req/sec	762.68	759.82	⚠️ -2.86
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.393	1.396	0
/error-in-render avg req/sec	1794.59	1791.28	⚠️ -3.31

Client Bundles (main, webpack)

	vercel/next.js canary	timneutkens/next.js add/more-link-tests	Change
925.HASH.js gzip	178 B	178 B	✓
framework-HASH.js gzip	42.2 kB	42.2 kB	✓
main-HASH.js gzip	29.1 kB	29.1 kB	✓
webpack-HASH.js gzip	1.45 kB	1.45 kB	✓
Overall change	72.9 kB	72.9 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	timneutkens/next.js add/more-link-tests	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	timneutkens/next.js add/more-link-tests	Change
_app-HASH.js gzip	1.35 kB	1.35 kB	✓
_error-HASH.js gzip	179 B	179 B	✓
amp-HASH.js gzip	313 B	313 B	✓
css-HASH.js gzip	325 B	325 B	✓
dynamic-HASH.js gzip	3.02 kB	3.02 kB	✓
head-HASH.js gzip	385 B	385 B	✓
hooks-HASH.js gzip	921 B	921 B	✓
image-HASH.js gzip	5.78 kB	5.78 kB	✓
index-HASH.js gzip	261 B	261 B	✓
link-HASH.js gzip	2.74 kB	2.74 kB	✓
routerDirect..HASH.js gzip	322 B	322 B	✓
script-HASH.js gzip	393 B	393 B	✓
withRouter-HASH.js gzip	317 B	317 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	16.4 kB	16.4 kB	✓

Client Build Manifests

	vercel/next.js canary	timneutkens/next.js add/more-link-tests	Change
_buildManifest.js gzip	456 B	456 B	✓
Overall change	456 B	456 B	✓

Rendered Page Sizes

	vercel/next.js canary	timneutkens/next.js add/more-link-tests	Change
index.html gzip	530 B	530 B	✓
link.html gzip	542 B	542 B	✓
withRouter.html gzip	525 B	525 B	✓
Overall change	1.6 kB	1.6 kB	✓

Commit: e35e4b7