e2e tests

Signed-off-by: Huabing Zhao <zhaohuabing@gmail.com>

Author: zhaohuabing

test/e2e/testdata/httproute-rewrite-host.yaml

@@ -34,6 +34,19 @@ spec:
     - group: gateway.envoyproxy.io
       kind: Backend
       name: backend-fqdn
+  - matches:
+    - path:
+        type: PathPrefix
+        value: /path-regex
+    filters:
+    - type: ExtensionRef
+      extensionRef:
+        group: gateway.envoyproxy.io
+        kind: HTTPRouteFilter
+        name: path-regex-host-rewrite
+    backendRefs:
+    - name: infra-backend-v1
+      port: 8080
 ---
 apiVersion: gateway.envoyproxy.io/v1alpha1
 kind: HTTPRouteFilter
@@ -57,6 +70,19 @@ spec:
       type: Backend
 ---
 apiVersion: gateway.envoyproxy.io/v1alpha1
+kind: HTTPRouteFilter
+metadata:
+  name: path-regex-host-rewrite
+  namespace: gateway-conformance-infra
+spec:
+  urlRewrite:
+    hostname:
+      type: PathRegex
+      pathRegex:
+        pattern: "^/path-regex/([^/]+).*"
+        substitution: "\\1.gateway-conformance-infra.svc.cluster.local"
+---
+apiVersion: gateway.envoyproxy.io/v1alpha1
 kind: Backend
 metadata:
   name: backend-fqdn

test/e2e/tests/httproute_rewrite_host.go

@@ -62,6 +62,19 @@ var HTTPRouteRewriteHostHeader = suite.ConformanceTest{
 				Backend:   "infra-backend-v1",
 				Namespace: ns,
 			},
+			{
+				Request: http.Request{
+					Path: "/path-regex/infra-backend-v1",
+				},
+				ExpectedRequest: &http.ExpectedRequest{
+					Request: http.Request{
+						Path: "/path-regex/infra-backend-v1",
+						Host: "infra-backend-v1.gateway-conformance-infra.svc.cluster.local",
+					},
+				},
+				Backend:   "infra-backend-v1",
+				Namespace: ns,
+			},
 		}
 		for i := range testCases {
 			// Declare tc here to avoid loop variable