Fix an issue where Vercel adapter may create functions for prerendered routes (#10231)

* fix: fix an issue where Vercel adapter may create functions for prerendered routes

* test: update test cases in `split.test.js`

* chore: add changeset

* refactor: apply suggested changes from code review

* Apply suggestions from code review

---------

Co-authored-by: Arsh <69170106+lilnasy@users.noreply.github.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/packages/integrations/vercel/test/split.test.js b/packages/integrations/vercel/test/split.test.js
index fbd61aa9b..e64a4dc60 100644
--- a/packages/integrations/vercel/test/split.test.js
+++ b/packages/integrations/vercel/test/split.test.js
@@ -14,14 +14,19 @@ describe('build: split', () => {
 		await fixture.build();
 	});
 
-	it('creates separate functions for each page', async () => {
+	it('creates separate functions for non-prerendered pages', async () => {
 		const files = await fixture.readdir('../.vercel/output/functions/');
 		assert.equal(files.length, 3);
+		assert.equal(files.includes('prerender.astro.func'), false);
 	});
 
 	it('creates the route definitions in the config.json', async () => {
 		const json = await fixture.readFile('../.vercel/output/config.json');
 		const config = JSON.parse(json);
 		assert.equal(config.routes.length, 5);
+		assert.equal(
+			config.routes.some((route) => route.dest === 'prerender.astro'),
+			false
+		);
 	});
 });