Add tests for new containertMap type in the CPUManager

pkg/kubelet/cm/cpumanager/BUILD

@@ -31,6 +31,7 @@ go_library(
 go_test(
     name = "go_default_test",
     srcs = [
+        "container_map_test.go",
         "cpu_assignment_test.go",
         "cpu_manager_test.go",
         "policy_none_test.go",

pkg/kubelet/cm/cpumanager/container_map_test.go

@@ -0,0 +1,76 @@
+/*
+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 cpumanager
+
+import (
+	"testing"
+
+	"k8s.io/api/core/v1"
+	apimachinery "k8s.io/apimachinery/pkg/types"
+)
+
+func TestContainerMap(t *testing.T) {
+	testCases := []struct {
+		podUID         string
+		containerNames []string
+		containerIDs   []string
+	}{
+		{
+			"fakePodUID",
+			[]string{"fakeContainerName-1", "fakeContainerName-2"},
+			[]string{"fakeContainerID-1", "fakeContainerName-2"},
+		},
+	}
+
+	for _, tc := range testCases {
+		pod := v1.Pod{}
+		pod.UID = apimachinery.UID(tc.podUID)
+
+		// Build a new containerMap from the testCases, checking proper
+		// addition, retrieval along the way.
+		cm := newContainerMap()
+		for i := range tc.containerNames {
+			container := v1.Container{Name: tc.containerNames[i]}
+
+			cm.Add(&pod, &container, tc.containerIDs[i])
+			containerID, err := cm.Get(&pod, &container)
+			if err != nil {
+				t.Errorf("error adding and retrieving container: %v", err)
+			}
+			if containerID != tc.containerIDs[i] {
+				t.Errorf("mismatched containerIDs %v, %v", containerID, tc.containerIDs[i])
+			}
+		}
+
+		// Remove all entries from the containerMap, checking proper removal of
+		// each along the way.
+		for i := range tc.containerNames {
+			container := v1.Container{Name: tc.containerNames[i]}
+			cm.Remove(tc.containerIDs[i])
+			containerID, err := cm.Get(&pod, &container)
+			if err == nil {
+				t.Errorf("unexpected retrieval of containerID after removal: %v", containerID)
+			}
+		}
+
+		// Verify containerMap now empty.
+		if len(cm) != 0 {
+			t.Errorf("unexpected entries still in containerMap: %v", cm)
+		}
+
+	}
+}