Move port utility out of endpoints controller

pkg/api/pod/util_test.go

@@ -0,0 +1,110 @@
+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+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 pod
+
+import (
+	"testing"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/util/intstr"
+)
+
+func TestFindPort(t *testing.T) {
+	testCases := []struct {
+		name       string
+		containers []api.Container
+		port       intstr.IntOrString
+		expected   int
+		pass       bool
+	}{{
+		name:       "valid int, no ports",
+		containers: []api.Container{{}},
+		port:       intstr.FromInt(93),
+		expected:   93,
+		pass:       true,
+	}, {
+		name: "valid int, with ports",
+		containers: []api.Container{{Ports: []api.ContainerPort{{
+			Name:          "",
+			ContainerPort: 11,
+			Protocol:      "TCP",
+		}, {
+			Name:          "p",
+			ContainerPort: 22,
+			Protocol:      "TCP",
+		}}}},
+		port:     intstr.FromInt(93),
+		expected: 93,
+		pass:     true,
+	}, {
+		name:       "valid str, no ports",
+		containers: []api.Container{{}},
+		port:       intstr.FromString("p"),
+		expected:   0,
+		pass:       false,
+	}, {
+		name: "valid str, one ctr with ports",
+		containers: []api.Container{{Ports: []api.ContainerPort{{
+			Name:          "",
+			ContainerPort: 11,
+			Protocol:      "UDP",
+		}, {
+			Name:          "p",
+			ContainerPort: 22,
+			Protocol:      "TCP",
+		}, {
+			Name:          "q",
+			ContainerPort: 33,
+			Protocol:      "TCP",
+		}}}},
+		port:     intstr.FromString("q"),
+		expected: 33,
+		pass:     true,
+	}, {
+		name: "valid str, two ctr with ports",
+		containers: []api.Container{{}, {Ports: []api.ContainerPort{{
+			Name:          "",
+			ContainerPort: 11,
+			Protocol:      "UDP",
+		}, {
+			Name:          "p",
+			ContainerPort: 22,
+			Protocol:      "TCP",
+		}, {
+			Name:          "q",
+			ContainerPort: 33,
+			Protocol:      "TCP",
+		}}}},
+		port:     intstr.FromString("q"),
+		expected: 33,
+		pass:     true,
+	}}
+
+	for _, tc := range testCases {
+		port, err := FindPort(&api.Pod{Spec: api.PodSpec{Containers: tc.containers}},
+			&api.ServicePort{Protocol: "TCP", TargetPort: tc.port})
+		if err != nil && tc.pass {
+			t.Errorf("unexpected error for %s: %v", tc.name, err)
+		}
+		if err == nil && !tc.pass {
+			t.Errorf("unexpected non-error for %s: %d", tc.name, port)
+		}
+		if port != tc.expected {
+			t.Errorf("wrong result for %s: expected %d, got %d", tc.name, tc.expected, port)
+		}
+	}
+}