Add header filter to api-gateway xDS golden test

agent/xds/resources_test.go

@@ -415,6 +415,19 @@ func getAPIGatewayGoldenTestCases(t *testing.T) []goldenTestCase {
 						Kind: structs.HTTPRoute,
 						Name: "route",
 						Rules: []structs.HTTPRouteRule{{
+							Filters: structs.HTTPFilters{
+								Headers: []structs.HTTPHeaderFilter{
+									{
+										Add: map[string]string{
+											"X-Header-Add": "added",
+										},
+										Set: map[string]string{
+											"X-Header-Set": "set",
+										},
+										Remove: []string{"X-Header-Remove"},
+									},
+								},
+							},
 							Services: []structs.HTTPService{{
 								Name: "service",
 							}},

agent/xds/testdata/routes/api-gateway-with-http-route-and-inline-certificate.latest.golden

@@ -18,8 +18,46 @@
               },
               "route":  {
                 "cluster":  "service.default.dc1.internal.11111111-2222-3333-4444-555555555555.consul"
+              },
+              "requestHeadersToAdd":  [
+                {
+                  "header":  {
+                    "key":  "X-Header-Add",
+                    "value":  "added"
+                  },
+                  "append":  true
+                },
+                {
+                  "header":  {
+                    "key":  "X-Header-Set",
+                    "value":  "set"
+                  },
+                  "append":  false
+                }
+              ],
+              "requestHeadersToRemove":  [
+                "X-Header-Remove"
+              ]
             }
+          ],
+          "requestHeadersToAdd":  [
+            {
+              "header":  {
+                "key":  "X-Header-Add",
+                "value":  "added"
+              },
+              "append":  true
+            },
+            {
+              "header":  {
+                "key":  "X-Header-Set",
+                "value":  "set"
+              },
+              "append":  false
             }
+          ],
+          "requestHeadersToRemove":  [
+            "X-Header-Remove"
           ]
         }
       ],