containerd-shim-kata: add unit test cases

Add unit test cases.

Signed-off-by: fupan <[email protected]>

containerd-shim-v2/container_test.go

@@ -0,0 +1,40 @@
+// Copyright (c) 2018 HyperHQ Inc.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package containerdshim
+
+import (
+	taskAPI "github.com/containerd/containerd/runtime/v2/task"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestNewContainer(t *testing.T) {
+	assert := assert.New(t)
+
+	_, err := newContainer(nil, nil, "", nil)
+
+	assert.Error(err)
+}
+
+func TestGetExec(t *testing.T) {
+	assert := assert.New(t)
+
+	r := &taskAPI.CreateTaskRequest{}
+
+	c, err := newContainer(nil, r, "", nil)
+	assert.NoError(err)
+
+	_, err = c.getExec("")
+	assert.Error(err)
+
+	c.execs = make(map[string]*exec)
+	_, err = c.getExec("")
+	assert.Error(err)
+
+	c.execs[TestID] = &exec{}
+	_, err = c.getExec(TestID)
+	assert.NoError(err)
+}