fixups

Author: Guy Bedford

integration-tests/js-compute/fixtures/app/src/headers.js

@@ -26,25 +26,31 @@ routes.set('/headers/from-response/set', async () => {
     backend: 'httpbin',
     cacheOverride: new CacheOverride('pass'),
   });
-  response.headers.set('cuStom', 'test');
-  return response;
+  return new Response(response.body, {
+    headers: {
+      cuStom: 'test',
+    },
+  });
 });
 
 routes.set('/headers/from-response/delete-invalid', async () => {
   const response = await fetch('https://httpbin.org/stream-bytes/11', {
     backend: 'httpbin',
     cacheOverride: new CacheOverride('pass'),
   });
-  response.headers.delete('none');
-  return response;
+  const outResponse = new Response(response);
+  outResponse.headers.delete('none');
+  return outResponse;
 });
 
 routes.set('/headers/from-response/set-delete', async () => {
   const response = await fetch('https://httpbin.org/stream-bytes/11', {
     backend: 'httpbin',
     cacheOverride: new CacheOverride('pass'),
   });
-  response.headers.set('custom', 'test');
-  response.headers.delete('access-control-allow-origin');
-  return response;
+  const outResponse = new Response(response);
+  outResponse.headers.set('custom', 'test');
+  outResponse.headers.set('another', 'test');
+  outResponse.headers.delete('access-control-allow-origin');
+  return outResponse;
 });

integration-tests/js-compute/fixtures/app/src/index.js

@@ -92,7 +92,10 @@ async function app(event) {
       }
     }
   } finally {
-    res.headers.set('fastly_service_version', FASTLY_SERVICE_VERSION);
+    try {
+      // this will fail if headers were same headers object from original upstream
+      res.headers.set('fastly_service_version', FASTLY_SERVICE_VERSION);
+    } catch {}
   }
 
   return res;

integration-tests/js-compute/fixtures/app/tests.json

@@ -1503,7 +1503,10 @@
   "GET /headers/from-response/set-delete": {
     "downstream_response": {
       "status": 200,
-      "headers": [["cuStom", "test"]]
+      "headers": [
+        ["cuStom", "test"],
+        ["another", "test"]
+      ]
     }
   },