kubelet: move PodManager and MirrorClient to a subpackage

This change moves pod_manager.go and mirror_client.go to a separate package.
Also made necessary, minor changes to facilitate testing.

pkg/kubelet/pod/mirror_client_test.go

@@ -0,0 +1,54 @@
+/*
+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"
+
+	kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
+)
+
+func TestParsePodFullName(t *testing.T) {
+	type nameTuple struct {
+		Name      string
+		Namespace string
+	}
+	successfulCases := map[string]nameTuple{
+		"bar_foo":         {Name: "bar", Namespace: "foo"},
+		"bar.org_foo.com": {Name: "bar.org", Namespace: "foo.com"},
+		"bar-bar_foo":     {Name: "bar-bar", Namespace: "foo"},
+	}
+	failedCases := []string{"barfoo", "bar_foo_foo", ""}
+
+	for podFullName, expected := range successfulCases {
+		name, namespace, err := kubecontainer.ParsePodFullName(podFullName)
+		if err != nil {
+			t.Errorf("unexpected error when parsing the full name: %v", err)
+			continue
+		}
+		if name != expected.Name || namespace != expected.Namespace {
+			t.Errorf("expected name %q, namespace %q; got name %q, namespace %q",
+				expected.Name, expected.Namespace, name, namespace)
+		}
+	}
+	for _, podFullName := range failedCases {
+		_, _, err := kubecontainer.ParsePodFullName(podFullName)
+		if err == nil {
+			t.Errorf("expected error when parsing the full name, got none")
+		}
+	}
+}