Add unstable_cache validate test case (vercel#59828)

Follow-up to vercel#59822 adding an
additional test case.

Closes NEXT-1918

test/e2e/app-dir/app-invalid-revalidate/app-invalid-revalidate.test.ts

@@ -74,5 +74,27 @@ createNextDescribe(
         await next.patchFile('app/page.tsx', origText)
       }
     })
+
+    it('should error properly for invalid revalidate on unstable_cache', async () => {
+      await next.stop().catch(() => {})
+      const origText = await next.readFile('app/page.tsx')
+
+      try {
+        await next.patchFile(
+          'app/page.tsx',
+          origText.replace('// await unstable', 'await unstable')
+        )
+        await next.start().catch(() => {})
+
+        await check(async () => {
+          if (isNextDev) {
+            await next.fetch('/')
+          }
+          return next.cliOutput
+        }, /Invalid revalidate value "1" on "unstable_cache/)
+      } finally {
+        await next.patchFile('app/page.tsx', origText)
+      }
+    })
   }
 )

test/e2e/app-dir/app-invalid-revalidate/app/page.tsx

@@ -1,6 +1,9 @@
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
+import { unstable_cache } from 'next/cache'
 // export const revalidate = '1'
 
 export default async function Page() {
   // await fetch('https://example.vercel.sh', { next: { revalidate: '1' } })
+  // await unstable_cache(async () => Date.now(), [], { revalidate: '1' })()
   return <p>hello world</p>
 }