Fix filesystempublicroutes test for Turbopack

[timneutkens]

What?

exportPathMap didn't work when Turbopack was enabled because the serializeNextConfig function mutates the original values, overriding exportPathMap.

This PR changes the serialization to copy the object and mutate only the copied object.

Also refactored the test that was checking _next, the better way to test that is to have the page render something dynamically, which is what is added in this PR.

Closes NEXT-2225

[timneutkens]

• canary
  • Fix filesystempublicroutes test for Turbopack #61132 👈

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[ijjk]

Stats from current PR

Default Build

General Overall increase ⚠️

	vercel/next.js canary	vercel/next.js 01-25-Fix_filesystempublicroutes_test_for_Turbopack	Change
buildDuration	11.8s	11.7s	N/A
buildDurationCached	6s	4.9s	N/A
nodeModulesSize	200 MB	200 MB	⚠️ +992 B
nextStartRea..uration (ms)	426ms	426ms	✓

Client Bundles (main, webpack)

	vercel/next.js canary	vercel/next.js 01-25-Fix_filesystempublicroutes_test_for_Turbopack	Change
3f784ff6-HASH.js gzip	53.4 kB	53.4 kB	✓
423.HASH.js gzip	185 B	181 B	N/A
68-HASH.js gzip	29.8 kB	29.8 kB	N/A
framework-HASH.js gzip	45.2 kB	45.2 kB	✓
main-app-HASH.js gzip	238 B	240 B	N/A
main-HASH.js gzip	31.8 kB	31.8 kB	N/A
webpack-HASH.js gzip	1.7 kB	1.7 kB	✓
Overall change	100 kB	100 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js 01-25-Fix_filesystempublicroutes_test_for_Turbopack	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js 01-25-Fix_filesystempublicroutes_test_for_Turbopack	Change
_app-HASH.js gzip	194 B	195 B	N/A
_error-HASH.js gzip	182 B	181 B	N/A
amp-HASH.js gzip	502 B	502 B	✓
css-HASH.js gzip	320 B	322 B	N/A
dynamic-HASH.js gzip	2.5 kB	2.5 kB	N/A
edge-ssr-HASH.js gzip	255 B	256 B	N/A
head-HASH.js gzip	350 B	349 B	N/A
hooks-HASH.js gzip	368 B	369 B	N/A
image-HASH.js gzip	4.18 kB	4.18 kB	N/A
index-HASH.js gzip	257 B	256 B	N/A
link-HASH.js gzip	2.61 kB	2.61 kB	N/A
routerDirect..HASH.js gzip	310 B	311 B	N/A
script-HASH.js gzip	384 B	383 B	N/A
withRouter-HASH.js gzip	306 B	308 B	N/A
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Overall change	608 B	608 B	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js 01-25-Fix_filesystempublicroutes_test_for_Turbopack	Change
_buildManifest.js gzip	484 B	484 B	✓
Overall change	484 B	484 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js 01-25-Fix_filesystempublicroutes_test_for_Turbopack	Change
index.html gzip	527 B	529 B	N/A
link.html gzip	539 B	541 B	N/A
withRouter.html gzip	521 B	524 B	N/A
Overall change	0 B	0 B	✓

Edge SSR bundle Size

	vercel/next.js canary	vercel/next.js 01-25-Fix_filesystempublicroutes_test_for_Turbopack	Change
edge-ssr.js gzip	94 kB	94 kB	N/A
page.js gzip	149 kB	149 kB	N/A
Overall change	0 B	0 B	✓

Middleware size

	vercel/next.js canary	vercel/next.js 01-25-Fix_filesystempublicroutes_test_for_Turbopack	Change
middleware-b..fest.js gzip	625 B	622 B	N/A
middleware-r..fest.js gzip	151 B	149 B	N/A
middleware.js gzip	37.6 kB	37.6 kB	N/A
edge-runtime..pack.js gzip	1.92 kB	1.92 kB	✓
Overall change	1.92 kB	1.92 kB	✓

Next Runtimes

	vercel/next.js canary	vercel/next.js 01-25-Fix_filesystempublicroutes_test_for_Turbopack	Change
app-page-exp...dev.js gzip	170 kB	170 kB	✓
app-page-exp..prod.js gzip	95.7 kB	95.7 kB	✓
app-page-tur..prod.js gzip	96.3 kB	96.3 kB	✓
app-page-tur..prod.js gzip	90.9 kB	90.9 kB	✓
app-page.run...dev.js gzip	142 kB	142 kB	✓
app-page.run..prod.js gzip	90.2 kB	90.2 kB	✓
app-route-ex...dev.js gzip	22.2 kB	22.2 kB	✓
app-route-ex..prod.js gzip	14.9 kB	14.9 kB	✓
app-route-tu..prod.js gzip	14.9 kB	14.9 kB	✓
app-route-tu..prod.js gzip	14.5 kB	14.5 kB	✓
app-route.ru...dev.js gzip	21.6 kB	21.6 kB	✓
app-route.ru..prod.js gzip	14.5 kB	14.5 kB	✓
pages-api-tu..prod.js gzip	9.42 kB	9.42 kB	✓
pages-api.ru...dev.js gzip	9.69 kB	9.69 kB	✓
pages-api.ru..prod.js gzip	9.42 kB	9.42 kB	✓
pages-turbo...prod.js gzip	22 kB	22 kB	✓
pages.runtim...dev.js gzip	22.6 kB	22.6 kB	✓
pages.runtim..prod.js gzip	22 kB	22 kB	✓
server.runti..prod.js gzip	49.7 kB	49.7 kB	✓
Overall change	932 kB	932 kB	✓

Commit: bcc7082

[ijjk]

Failing test suites

Commit: bcc7082

pnpm test-dev test/e2e/app-dir/app/index.test.ts (PPR)

• app dir - basic > known bugs > should support React cache > server component client-navigation

Expand output

● app dir - basic › known bugs › should support React cache › server component client-navigation

expect(received).toBe(expected) // Object.is equality

Expected: "0.208788532179625"
Received: "0.08418260790234444"

  1544 |           const val1 = await browser.elementByCss('#value-1').text()
  1545 |           const val2 = await browser.elementByCss('#value-2').text()
> 1546 |           expect(val1).toBe(val2)
       |                        ^
  1547 |         })
  1548 |
  1549 |         it('client component', async () => {

  at Object.toBe (e2e/app-dir/app/index.test.ts:1546:24)

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