diff --git a/core/pkg/ingress/controller/named_port_test.go b/core/pkg/ingress/controller/named_port_test.go
new file mode 100644
index 000000000..c92ad9806
--- /dev/null
+++ b/core/pkg/ingress/controller/named_port_test.go
@@ -0,0 +1,191 @@
+/*
+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 controller
+
+import (
+	"reflect"
+	"testing"
+
+	"k8s.io/ingress/core/pkg/ingress/annotations/service"
+	"k8s.io/kubernetes/pkg/api"
+	testclient "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/fake"
+	"k8s.io/kubernetes/pkg/util/intstr"
+)
+
+func buildSimpleClientSet() *testclient.Clientset {
+	return testclient.NewSimpleClientset(
+		&api.PodList{Items: []api.Pod{
+			{
+				ObjectMeta: api.ObjectMeta{
+					Name:      "foo1",
+					Namespace: api.NamespaceDefault,
+					Labels: map[string]string{
+						"lable_sig": "foo_pod",
+					},
+				},
+				Spec: api.PodSpec{
+					NodeName: "foo_node_1",
+					Containers: []api.Container{
+						{
+							Ports: []api.ContainerPort{
+								{
+									Name:          "foo1_named_port_c1",
+									Protocol:      api.ProtocolTCP,
+									ContainerPort: 80,
+								},
+							},
+						},
+					},
+				},
+			},
+			{
+				ObjectMeta: api.ObjectMeta{
+					Name:      "foo1",
+					Namespace: api.NamespaceSystem,
+					Labels: map[string]string{
+						"lable_sig": "foo_pod",
+					},
+				},
+			},
+		}},
+		&api.ServiceList{Items: []api.Service{
+			{
+				ObjectMeta: api.ObjectMeta{
+					Namespace: api.NamespaceDefault,
+					Name:      "named_port_test_service",
+				},
+			},
+		}},
+	)
+}
+
+func buildGenericController() *GenericController {
+	return &GenericController{
+		cfg: &Configuration{
+			Client: buildSimpleClientSet(),
+		},
+	}
+}
+
+func buildService() *api.Service {
+	return &api.Service{
+		ObjectMeta: api.ObjectMeta{
+			Namespace: api.NamespaceSystem,
+			Name:      "named_port_test_service",
+		},
+
+		Spec: api.ServiceSpec{
+			ClusterIP: "10.10.10.10",
+		},
+	}
+}
+
+func TestCheckSvcForUpdate(t *testing.T) {
+	foos := []struct {
+		n   string
+		ns  string
+		sps []api.ServicePort
+		sl  map[string]string
+		er  string
+	}{
+		{
+			"pods_have_not_been_found_in_this_namespace",
+			api.NamespaceSystem,
+			[]api.ServicePort{
+				{Name: "foo_port_1", Port: 8080, Protocol: api.ProtocolTCP, TargetPort: intstr.FromString("foo1_named_port_c1")},
+				{Name: "foo_port_2", Port: 8181, Protocol: api.ProtocolTCP, TargetPort: intstr.FromInt(81)},
+				{Name: "foo_port_3", Port: 8282, Protocol: api.ProtocolTCP, TargetPort: intstr.FromString("")},
+			},
+			map[string]string{
+				"lable_sig": "foo_pod",
+			},
+			"",
+		},
+		{
+			"ports_have_not_been_found_in_this_pod",
+			api.NamespaceDefault,
+			[]api.ServicePort{
+				{Name: "foo_port_1", Port: 8080, Protocol: api.ProtocolTCP, TargetPort: intstr.FromString("foo1_named_port_cXX")},
+				{Name: "foo_port_2", Port: 8181, Protocol: api.ProtocolTCP, TargetPort: intstr.FromInt(81)},
+				{Name: "foo_port_3", Port: 8282, Protocol: api.ProtocolTCP, TargetPort: intstr.FromString("")},
+			},
+			map[string]string{
+				"lable_sig": "foo_pod",
+			},
+			"",
+		},
+
+		{
+			"ports_fixed",
+			api.NamespaceDefault,
+			[]api.ServicePort{
+				{Name: "foo_port_1", Port: 8080, Protocol: api.ProtocolTCP, TargetPort: intstr.FromInt(80)},
+				{Name: "foo_port_2", Port: 8181, Protocol: api.ProtocolTCP, TargetPort: intstr.FromInt(81)},
+				{Name: "foo_port_3", Port: 8282, Protocol: api.ProtocolTCP, TargetPort: intstr.FromString("")},
+			},
+			map[string]string{
+				"lable_sig": "foo_pod",
+			},
+			"",
+		},
+		{
+			"nil_selector",
+			api.NamespaceDefault,
+			[]api.ServicePort{
+				{Name: "foo_port_1", Port: 8080, Protocol: api.ProtocolTCP, TargetPort: intstr.FromString("foo1_named_port_c1")},
+				{Name: "foo_port_2", Port: 8181, Protocol: api.ProtocolTCP, TargetPort: intstr.FromInt(81)},
+				{Name: "foo_port_3", Port: 8282, Protocol: api.ProtocolTCP, TargetPort: intstr.FromString("")},
+			},
+			nil,
+			"{\"foo1_named_port_c1\":\"80\"}",
+		},
+		{
+			"normal_update",
+			api.NamespaceDefault,
+			[]api.ServicePort{
+				{Name: "foo_port_1", Port: 8080, Protocol: api.ProtocolTCP, TargetPort: intstr.FromString("foo1_named_port_c1")},
+				{Name: "foo_port_2", Port: 8181, Protocol: api.ProtocolTCP, TargetPort: intstr.FromInt(81)},
+				{Name: "foo_port_3", Port: 8282, Protocol: api.ProtocolTCP, TargetPort: intstr.FromString("")},
+			},
+			map[string]string{
+				"lable_sig": "foo_pod",
+			},
+			"{\"foo1_named_port_c1\":\"80\"}",
+		},
+	}
+
+	for _, foo := range foos {
+		t.Run(foo.n, func(t *testing.T) {
+			gc := buildGenericController()
+			s := buildService()
+			s.SetNamespace(foo.ns)
+			s.Spec.Ports = foo.sps
+			s.Spec.Selector = foo.sl
+
+			err := gc.checkSvcForUpdate(s)
+			if err != nil {
+				t.Fatalf("unexpected error: %v", err)
+			}
+
+			rs, _ := gc.cfg.Client.Core().Services(api.NamespaceDefault).Get("named_port_test_service")
+			rr := rs.ObjectMeta.Annotations[service.NamedPortAnnotation]
+			if !reflect.DeepEqual(rr, foo.er) {
+				t.Errorf("Returned %s, but expected %s for %s", rr, foo.er, foo.n)
+			}
+		})
+	}
+}