add unit test cases for core.pkg.ingress.status.election

core/pkg/ingress/status/election_test.go

@@ -0,0 +1,130 @@
+/*
+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 status
+
+import (
+	"encoding/json"
+	"testing"
+	"time"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/unversioned"
+	tc "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/fake"
+	"k8s.io/kubernetes/pkg/client/leaderelection/resourcelock"
+)
+
+func TestGetCurrentLeaderLeaderExist(t *testing.T) {
+	fkER := resourcelock.LeaderElectionRecord{
+		HolderIdentity:       "currentLeader",
+		LeaseDurationSeconds: 30,
+		AcquireTime:          unversioned.Now(),
+		RenewTime:            unversioned.Now(),
+		LeaderTransitions:    3,
+	}
+	leaderInfo, _ := json.Marshal(fkER)
+	fkEndpoints := api.Endpoints{
+		ObjectMeta: api.ObjectMeta{
+			Name:      "ingress-controller-test",
+			Namespace: api.NamespaceSystem,
+			Annotations: map[string]string{
+				resourcelock.LeaderElectionRecordAnnotationKey: string(leaderInfo),
+			},
+		},
+	}
+	fk := tc.NewSimpleClientset(&api.EndpointsList{Items: []api.Endpoints{fkEndpoints}})
+	identity, endpoints, err := getCurrentLeader("ingress-controller-test", api.NamespaceSystem, fk)
+	if err != nil {
+		t.Fatalf("expected identitiy and endpoints but returned error %s", err)
+	}
+
+	if endpoints == nil {
+		t.Fatalf("returned nil but expected an endpoints")
+	}
+
+	if identity != "currentLeader" {
+		t.Fatalf("returned %v but expected %v", identity, "currentLeader")
+	}
+}
+
+func TestGetCurrentLeaderLeaderNotExist(t *testing.T) {
+	fkEndpoints := api.Endpoints{
+		ObjectMeta: api.ObjectMeta{
+			Name:        "ingress-controller-test",
+			Namespace:   api.NamespaceSystem,
+			Annotations: map[string]string{},
+		},
+	}
+	fk := tc.NewSimpleClientset(&api.EndpointsList{Items: []api.Endpoints{fkEndpoints}})
+	identity, endpoints, err := getCurrentLeader("ingress-controller-test", api.NamespaceSystem, fk)
+	if err != nil {
+		t.Fatalf("unexpeted error: %v", err)
+	}
+
+	if endpoints == nil {
+		t.Fatalf("returned nil but expected an endpoints")
+	}
+
+	if identity != "" {
+		t.Fatalf("returned %s but expected %s", identity, "")
+	}
+}
+
+func TestGetCurrentLeaderAnnotationError(t *testing.T) {
+	fkEndpoints := api.Endpoints{
+		ObjectMeta: api.ObjectMeta{
+			Name:      "ingress-controller-test",
+			Namespace: api.NamespaceSystem,
+			Annotations: map[string]string{
+				resourcelock.LeaderElectionRecordAnnotationKey: "just-test-error-leader-annotation",
+			},
+		},
+	}
+	fk := tc.NewSimpleClientset(&api.EndpointsList{Items: []api.Endpoints{fkEndpoints}})
+	_, _, err := getCurrentLeader("ingress-controller-test", api.NamespaceSystem, fk)
+	if err == nil {
+		t.Errorf("expected error")
+	}
+}
+
+func TestNewElection(t *testing.T) {
+	fk := tc.NewSimpleClientset(&api.EndpointsList{Items: []api.Endpoints{
+		{
+			ObjectMeta: api.ObjectMeta{
+				Name:      "ingress-controller-test",
+				Namespace: api.NamespaceSystem,
+			},
+		},
+		{
+			ObjectMeta: api.ObjectMeta{
+				Name:      "ingress-controller-test-020",
+				Namespace: api.NamespaceSystem,
+			},
+		},
+	}})
+
+	ne, err := NewElection("ingress-controller-test", "startLeader", api.NamespaceSystem, 4*time.Second, func(leader string) {
+		// do nothing
+		go t.Logf("execute callback fun, leader is: %s", leader)
+	}, fk)
+	if err != nil {
+		t.Fatalf("unexpected error %v", err)
+	}
+
+	if ne == nil {
+		t.Fatalf("unexpected nil")
+	}
+}