Add missing tests for store/endpoint (#7039)

internal/ingress/controller/store/endpoint_test.go

@@ -0,0 +1,66 @@
+/*
+Copyright 2017 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 store
+
+import (
+	apiv1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/tools/cache"
+	"testing"
+)
+
+func newEndpointLister(t *testing.T) *EndpointLister {
+	t.Helper()
+
+	return &EndpointLister{Store: cache.NewStore(cache.MetaNamespaceKeyFunc)}
+}
+
+func TestEndpointLister(t *testing.T) {
+	t.Run("the key does not exist", func(t *testing.T) {
+		el := newEndpointLister(t)
+
+		key := "namespace/endpoint"
+		_, err := el.ByKey(key)
+
+		if err == nil {
+			t.Error("expected an error but nothing has been returned")
+		}
+
+		if _, ok := err.(NotExistsError); !ok {
+			t.Errorf("expected NotExistsError, got %v", err)
+		}
+	})
+
+	t.Run("the key exists", func(t *testing.T) {
+		el := newEndpointLister(t)
+
+		key := "namespace/endpoint"
+		endpoint := &apiv1.Endpoints{ObjectMeta: metav1.ObjectMeta{Namespace: "namespace", Name: "endpoint"}}
+
+		el.Add(endpoint)
+
+		e, err := el.ByKey(key)
+
+		if err != nil {
+			t.Errorf("unexpeted error %v", err)
+		}
+
+		if e != endpoint {
+			t.Errorf("expected %v, error, got %v", e, endpoint)
+		}
+	})
+}