add e2e test for function config manifest

test/e2e/app-dir/with-exported-function-config/app/foo/bar/route.ts

@@ -0,0 +1,8 @@
+import { NextResponse } from 'next/server'
+
+export async function GET() {
+  return NextResponse.json({ hello: 'world' })
+}
+
+export const runtime = 'edge'
+export const maxDuration = 2

test/e2e/app-dir/with-exported-function-config/app/route.ts

@@ -0,0 +1,7 @@
+import { NextResponse } from 'next/server'
+
+export async function GET() {
+  return NextResponse.json({ hello: 'world' })
+}
+
+export const maxDuration = 5

test/e2e/app-dir/with-exported-function-config/next.config.js

@@ -0,0 +1,6 @@
+/**
+ * @type {import('next').NextConfig}
+ */
+const nextConfig = {}
+
+module.exports = nextConfig

test/e2e/app-dir/with-exported-function-config/with-exported-function-config.test.ts

@@ -0,0 +1,28 @@
+import { createNextDescribe } from 'e2e-utils'
+
+createNextDescribe(
+  'with-exported-function-config',
+  {
+    files: __dirname,
+  },
+  ({ next, isNextStart }) => {
+    if (isNextStart) {
+      it('should have correct values in function config manifest', async () => {
+        const functionsConfigManifest = JSON.parse(
+          await next.readFile('.next/server/functions-config-manifest.json')
+        )
+
+        expect(functionsConfigManifest).toMatchInlineSnapshot(`
+          Object {
+            "/": Object {
+              "maxDuration": 5,
+            },
+            "/foo/bar": Object {
+              "maxDuration": 2,
+            },
+          }
+        `)
+      })
+    }
+  }
+)