diff --git a/core/pkg/ingress/annotations/service/service_test.go b/core/pkg/ingress/annotations/service/service_test.go
new file mode 100644
index 000000000..abfa0f907
--- /dev/null
+++ b/core/pkg/ingress/annotations/service/service_test.go
@@ -0,0 +1,99 @@
+/*
+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 service
+
+import (
+	"encoding/json"
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/unversioned"
+	"testing"
+)
+
+func fakeService(npa bool, ps bool, expectedP string) *api.Service {
+	// fake name for the map of ports
+	fakeNpa := NamedPortAnnotation
+	if !npa {
+		fakeNpa = "fake" + NamedPortAnnotation
+	}
+
+	// fake ports
+	fakePs, _ := json.Marshal(map[string]string{
+		"port1": expectedP,
+		"port2": "10211",
+	})
+	if !ps {
+		fakePs, _ = json.Marshal(expectedP)
+	}
+
+	// fake service
+	return &api.Service{
+		TypeMeta: unversioned.TypeMeta{
+			Kind:       "ingress",
+			APIVersion: "v1",
+		},
+		ObjectMeta: api.ObjectMeta{
+			Annotations: map[string]string{
+				fakeNpa: string(fakePs),
+			},
+			Namespace: api.NamespaceDefault,
+			Name:      "named-port-test",
+		},
+	}
+}
+
+func TestGetPortMappingSuccess(t *testing.T) {
+	fakeS := fakeService(true, true, "10011")
+	port, err := GetPortMapping("port1", fakeS)
+	if err != nil {
+		t.Errorf("failed to get port with name %s, error: %v", "port1", err)
+		return
+	}
+	if port != 10011 {
+		t.Errorf("%s: expected %d but returned %d", "port1", 10011, port)
+	}
+}
+
+func TestGetPortMappingFailedNamedPortMappingNotExist(t *testing.T) {
+	fakeS := fakeService(false, true, "10011")
+	_, err := GetPortMapping("port1", fakeS)
+	if err == nil {
+		t.Errorf("%s: expected error but returned nil", "port1")
+	}
+}
+
+func TestGetPortMappingFailedPortNotExist(t *testing.T) {
+	fakeS := fakeService(true, true, "10011")
+	_, err := GetPortMapping("port3", fakeS)
+	if err == nil {
+		t.Errorf("%s: expected error but returned nil", "port3")
+	}
+}
+
+func TestGetPortMappingFailedPortInvalid(t *testing.T) {
+	fakeS := fakeService(true, true, "s2017")
+	_, err := GetPortMapping("port1", fakeS)
+	if err == nil {
+		t.Errorf("%s: expected error but returned nil", "port1")
+	}
+}
+
+func TestGetPortMappingFailedApiServiceIsNil(t *testing.T) {
+	_, err := GetPortMapping("port1", nil)
+	if err == nil {
+		t.Errorf("%s: expected error but returned nil", "port1")
+	}
+}