Fix a bug in the recently added unstable_getResponseFromNextConfig. (#72355)

This utility was added in #70731
but incorrectly said there was a match even if `has` and `missing`
didn't match.

This also updates the test utility to automatically set the `Host`
header when constructing a request (if the URL has a host).

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---------

Co-authored-by: Mark Knichel <[email protected]>
Co-authored-by: JJ Kasper <[email protected]>

Author: 3 people

packages/next/src/experimental/testing/server/config-testing-utils.test.ts

@@ -49,6 +49,64 @@ describe('config-testing-utils', () => {
       )
     })
 
+    it("ignores redirect that doesn't match has", async () => {
+      const response = await unstable_getResponseFromNextConfig({
+        url: 'https://nextjs.org/test/foo',
+        nextConfig: {
+          async redirects() {
+            return [
+              {
+                source: '/test/:slug',
+                destination: '/test2/:slug',
+                permanent: false,
+                has: [
+                  {
+                    type: 'header',
+                    key: 'host',
+                    value: 'othersite.com',
+                  },
+                ],
+              },
+            ]
+          },
+        },
+      })
+      expect(response.status).toEqual(200)
+    })
+
+    it('redirects with has and missing', async () => {
+      const response = await unstable_getResponseFromNextConfig({
+        url: 'https://nextjs.org/test/foo',
+        nextConfig: {
+          async redirects() {
+            return [
+              {
+                source: '/test/:slug',
+                destination: '/test2/:slug',
+                permanent: false,
+                has: [
+                  {
+                    type: 'host',
+                    value: 'nextjs.org',
+                  },
+                ],
+                missing: [
+                  {
+                    type: 'host',
+                    value: 'othersite.com',
+                  },
+                ],
+              },
+            ]
+          },
+        },
+      })
+      expect(response.status).toEqual(307)
+      expect(response.headers.get('location')).toEqual(
+        'https://nextjs.org/test2/foo'
+      )
+    })
+
     it('redirects take precedence over rewrites', async () => {
       const response = await unstable_getResponseFromNextConfig({
         url: 'https://nextjs.org/test/foo',

packages/next/src/experimental/testing/server/config-testing-utils.ts

@@ -43,8 +43,8 @@ function matchRoute(
       )
     }
     if (route.has || route.missing) {
-      if (matchHas(request, parsedUrl.query, route.has, route.missing)) {
-        return pathMatch.params
+      if (!matchHas(request, parsedUrl.query, route.has, route.missing)) {
+        return
       }
     }
     return pathMatch.params

packages/next/src/experimental/testing/server/utils.ts

@@ -3,6 +3,7 @@ import { MockedRequest } from '../../../server/lib/mock-request'
 import { NodeNextRequest } from '../../../server/base-http/node'
 import type { BaseNextRequest } from '../../../server/base-http'
 import type { NextResponse } from '../../../server/web/exports'
+import { parseUrl } from '../../../lib/url'
 
 export function constructRequest({
   url,
@@ -16,6 +17,9 @@ export function constructRequest({
   if (!headers) {
     headers = {}
   }
+  if (!headers.host) {
+    headers.host = parseUrl(url)?.host
+  }
   if (cookies) {
     headers = {
       ...headers,