conformance: listener references invalid secret

A new conformance test case has been added to ensure that whenever a
listener references an unexisting secret as CertificateRef, the
Condition ResolvedRefs is set as failed with reason
InvalidCertificateRef.

Signed-off-by: Mattia Lavacca <lavacca.mattia@gmail.com>

conformance/tests/gateway-secret-missing-referenced-secret.go

@@ -0,0 +1,58 @@
+/*
+Copyright 2022 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package tests
+
+import (
+	"testing"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/types"
+
+	"sigs.k8s.io/gateway-api/apis/v1alpha2"
+	"sigs.k8s.io/gateway-api/conformance/utils/kubernetes"
+	"sigs.k8s.io/gateway-api/conformance/utils/suite"
+)
+
+func init() {
+	ConformanceTests = append(ConformanceTests, GatewaySecretMissingReferencedSecret)
+}
+
+var GatewaySecretMissingReferencedSecret = suite.ConformanceTest{
+	ShortName:   "GatewaySecretMissingReferencedSecret",
+	Description: "A Gateway should fail to become ready if the Gateway has a certificateRef for a nonexistent Secret",
+	Manifests:   []string{"tests/gateway-secret-missing-referenced-secret.yaml"},
+	Test: func(t *testing.T, s *suite.ConformanceTestSuite) {
+		gwNN := types.NamespacedName{Name: "gateway-secret-missing-referenced-secret", Namespace: "gateway-conformance-infra"}
+
+		t.Run("Gateway listener should have a false ResolvedRefs condition with reason InvalidCertificateRef", func(t *testing.T) {
+			listeners := []v1alpha2.ListenerStatus{{
+				Name: v1alpha2.SectionName("https"),
+				SupportedKinds: []v1alpha2.RouteGroupKind{{
+					Group: (*v1alpha2.Group)(&v1alpha2.GroupVersion.Group),
+					Kind:  v1alpha2.Kind("HTTPRoute"),
+				}},
+				Conditions: []metav1.Condition{{
+					Type:   string(v1alpha2.ListenerConditionResolvedRefs),
+					Status: metav1.ConditionFalse,
+					Reason: string(v1alpha2.ListenerReasonInvalidCertificateRef),
+				}},
+			}}
+
+			kubernetes.GatewayStatusMustHaveListeners(t, s.Client, s.TimeoutConfig, gwNN, listeners)
+		})
+	},
+}

conformance/tests/gateway-secret-missing-referenced-secret.yaml

@@ -0,0 +1,19 @@
+apiVersion: gateway.networking.k8s.io/v1alpha2
+kind: Gateway
+metadata:
+  name: gateway-secret-missing-referenced-secret
+  namespace: gateway-conformance-infra
+spec:
+  gatewayClassName: "{GATEWAY_CLASS_NAME}"
+  listeners:
+    - name: https
+      port: 443
+      protocol: HTTPS
+      allowedRoutes:
+        namespaces:
+          from: All
+      tls:
+        certificateRefs:
+          - group: ""
+            kind: Secret
+            name: not-existing-secret