Extract slow tests to avoid wasteful start/stop

[eps1lon]

The extracted test started timing out in #65058. When it does, it leaves the whole test suite in a corrupted state and fails all subsequent tests.

The slow part was just immediately stopping. It also wasn't robust against test failures since the cleanup logic was in the test itself not beforeEach or afterEach.

I moved the test to a separate describe block where tests don't start with a started Next.js server. This saves time and isolates failing tests.

Closes NEXT-3280

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General

	vercel/next.js canary	vercel/next.js sebbie/slow-turbo-tst	Change
buildDuration	26.3s	24.2s	N/A
buildDurationCached	15.3s	12.8s	N/A
nodeModulesSize	360 MB	360 MB	✓
nextStartRea..uration (ms)	766ms	784ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	vercel/next.js sebbie/slow-turbo-tst	Change
1103-HASH.js gzip	31.9 kB	31.9 kB	N/A
1a9f679d-HASH.js gzip	53.5 kB	53.5 kB	N/A
335-HASH.js gzip	5.05 kB	5.05 kB	✓
7953.HASH.js gzip	169 B	169 B	✓
framework-HASH.js gzip	45.2 kB	45.2 kB	✓
main-app-HASH.js gzip	230 B	229 B	N/A
main-HASH.js gzip	31.6 kB	31.6 kB	N/A
webpack-HASH.js gzip	1.65 kB	1.65 kB	N/A
Overall change	50.4 kB	50.4 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js sebbie/slow-turbo-tst	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

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_app-HASH.js gzip	192 B	193 B	N/A
_error-HASH.js gzip	192 B	193 B	N/A
amp-HASH.js gzip	507 B	511 B	N/A
css-HASH.js gzip	341 B	343 B	N/A
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edge-ssr-HASH.js gzip	266 B	265 B	N/A
head-HASH.js gzip	362 B	365 B	N/A
hooks-HASH.js gzip	392 B	392 B	✓
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withRouter-HASH.js gzip	324 B	324 B	✓
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Overall change	8.27 kB	8.27 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js sebbie/slow-turbo-tst	Change
_buildManifest.js gzip	483 B	484 B	N/A
Overall change	0 B	0 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js sebbie/slow-turbo-tst	Change
index.html gzip	527 B	526 B	N/A
link.html gzip	540 B	538 B	N/A
withRouter.html gzip	522 B	521 B	N/A
Overall change	0 B	0 B	✓

Edge SSR bundle Size

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edge-ssr.js gzip	94.7 kB	94.7 kB	N/A
page.js gzip	182 kB	182 kB	N/A
Overall change	0 B	0 B	✓

Middleware size

	vercel/next.js canary	vercel/next.js sebbie/slow-turbo-tst	Change
middleware-b..fest.js gzip	623 B	621 B	N/A
middleware-r..fest.js gzip	156 B	156 B	✓
middleware.js gzip	25.7 kB	25.7 kB	N/A
edge-runtime..pack.js gzip	839 B	839 B	✓
Overall change	995 B	995 B	✓

Next Runtimes

	vercel/next.js canary	vercel/next.js sebbie/slow-turbo-tst	Change
app-page-exp...dev.js gzip	171 kB	171 kB	✓
app-page-exp..prod.js gzip	98.7 kB	98.7 kB	✓
app-page-tur..prod.js gzip	100 kB	100 kB	✓
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app-page.run..prod.js gzip	93.2 kB	93.2 kB	✓
app-route-ex...dev.js gzip	21.5 kB	21.5 kB	✓
app-route-ex..prod.js gzip	15.2 kB	15.2 kB	✓
app-route-tu..prod.js gzip	15.2 kB	15.2 kB	✓
app-route-tu..prod.js gzip	15 kB	15 kB	✓
app-route.ru...dev.js gzip	21.3 kB	21.3 kB	✓
app-route.ru..prod.js gzip	15 kB	15 kB	✓
pages-api-tu..prod.js gzip	9.55 kB	9.55 kB	✓
pages-api.ru...dev.js gzip	9.82 kB	9.82 kB	✓
pages-api.ru..prod.js gzip	9.55 kB	9.55 kB	✓
pages-turbo...prod.js gzip	21.5 kB	21.5 kB	✓
pages.runtim...dev.js gzip	22.1 kB	22.1 kB	✓
pages.runtim..prod.js gzip	21.5 kB	21.5 kB	✓
server.runti..prod.js gzip	51.6 kB	51.6 kB	✓
Overall change	963 kB	963 kB	✓

build cache Overall increase ⚠️

	vercel/next.js canary	vercel/next.js sebbie/slow-turbo-tst	Change
0.pack gzip	1.62 MB	1.62 MB	N/A
index.pack gzip	114 kB	114 kB	⚠️ +460 B
Overall change	114 kB	114 kB	⚠️ +460 B

Diff details

Diff for edge-ssr.js

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Commit: 98e6e9d