test: enable prerender e2e tests after rollupOptions.input fix

- Enable previously skipped prerender tests for both serverless and edge sites.
- The tests were disabled due to React Router issue #13226, but now work correctly after the rollupOptions.input merge fix in plugin.ts.

Author: nahyeongjin1

tests/e2e/fixtures/react-router-edge-site/react-router.config.ts

@@ -4,7 +4,8 @@ export default {
   // Config options...
   // Server-side render by default, to enable SPA mode set this to `false`
   ssr: true,
-  // TODO(serhalp) Revisit this if RR team changes their minds:
-  // https://github.com/remix-run/react-router/issues/13226#issuecomment-2776672461.
-  // prerender: ['/prerendered'],
+  // Previously disabled due to https://github.com/remix-run/react-router/issues/13226#issuecomment-2776672461.
+  // Now enabled after fixing rollupOptions.input merge in plugin.ts to preserve existing entries
+  // including 'virtual:react-router/server-build'.
+  prerender: ['/prerendered'],
 } satisfies Config

tests/e2e/fixtures/react-router-serverless-site/react-router.config.ts

@@ -4,7 +4,8 @@ export default {
   // Config options...
   // Server-side render by default, to enable SPA mode set this to `false`
   ssr: true,
-  // TODO(serhalp) Revisit this if RR team changes their minds:
-  // https://github.com/remix-run/react-router/issues/13226#issuecomment-2776672461.
-  // prerender: ['/prerendered'],
+  // Previously disabled due to https://github.com/remix-run/react-router/issues/13226#issuecomment-2776672461.
+  // Now enabled after fixing rollupOptions.input merge in plugin.ts to preserve existing entries
+  // including 'virtual:react-router/server-build'.
+  prerender: ['/prerendered'],
 } satisfies Config

tests/e2e/react-router-user-journeys.spec.ts

@@ -33,9 +33,9 @@ test.describe('React Router user journeys', () => {
       expect(response?.headers()['cache-status']).toMatch(CACHE_STATUS_SERVED_FROM_EDGE)
     })
 
-    // TODO(serhalp) Revisit this if RR team changes their minds:
-    // https://github.com/remix-run/react-router/issues/13226#issuecomment-2776672461.
-    test.skip('serves a response from the CDN (without compute) for a pre-rendered route', async ({
+    // Previously skipped due to https://github.com/remix-run/react-router/issues/13226#issuecomment-2776672461.
+    // Now enabled after fixing rollupOptions.input merge in plugin.ts to preserve existing entries.
+    test('serves a response from the CDN (without compute) for a pre-rendered route', async ({
       page,
       reactRouterServerlessSite,
     }) => {
@@ -177,9 +177,9 @@ test.describe('React Router user journeys', () => {
       expect(response?.headers()['cache-status']).toMatch(CACHE_STATUS_SERVED_FROM_EDGE)
     })
 
-    // TODO(serhalp) Revisit this if RR team changes their minds:
-    // https://github.com/remix-run/react-router/issues/13226#issuecomment-2776672461.
-    test.skip('serves a response from the CDN (without compute) for a pre-rendered route', async ({
+    // Previously skipped due to https://github.com/remix-run/react-router/issues/13226#issuecomment-2776672461.
+    // Now enabled after fixing rollupOptions.input merge in plugin.ts to preserve existing entries.
+    test('serves a response from the CDN (without compute) for a pre-rendered route', async ({
       page,
       reactRouterEdgeSite,
     }) => {