proxy/shim: add unit tests

To test built-in proxy and shim types.

Signed-off-by: Peng Tao <bergwolf@gmail.com>

virtcontainers/podlist_test.go

@@ -0,0 +1,42 @@
+//
+// Copyright (c) 2018 HyperHQ Inc.
+//
+// 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 virtcontainers
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPodListOperations(t *testing.T) {
+	p := &Pod{id: "testpodListpod"}
+	l := &podList{pods: make(map[string]*Pod)}
+	err := l.addPod(p)
+	assert.Nil(t, err, "addPod failed")
+
+	err = l.addPod(p)
+	assert.NotNil(t, err, "add same pod should fail")
+
+	np, err := l.lookupPod(p.id)
+	assert.Nil(t, err, "lookupPod failed")
+	assert.Equal(t, np, p, "lookupPod returns different pod %v:%v", np, p)
+
+	_, err = l.lookupPod("some-non-existing-pod-name")
+	assert.NotNil(t, err, "lookupPod for non-existing pod should fail")
+
+	l.removePod(p.id)
+}