integration: Add container restart test

Add an integration test case to test whether a runtime can restart a
container properly.

Signed-off-by: Li Yuxuan <liyuxuan04@baidu.com>

integration/container_restart_test.go

@@ -0,0 +1,60 @@
+/*
+Copyright 2019 The containerd 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 integration
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+// Test to verify container can be restarted
+func TestContainerRestart(t *testing.T) {
+	t.Logf("Create a pod config and run sandbox container")
+	sbConfig := PodSandboxConfig("sandbox1", "restart")
+	sb, err := runtimeService.RunPodSandbox(sbConfig, *runtimeHandler)
+	require.NoError(t, err)
+	defer func() {
+		assert.NoError(t, runtimeService.StopPodSandbox(sb))
+		assert.NoError(t, runtimeService.RemovePodSandbox(sb))
+	}()
+	t.Logf("Create a container config and run container in a pod")
+	containerConfig := ContainerConfig(
+		"container1",
+		pauseImage,
+		WithTestLabels(),
+		WithTestAnnotations(),
+	)
+	cn, err := runtimeService.CreateContainer(sb, containerConfig, sbConfig)
+	require.NoError(t, err)
+	defer func() {
+		assert.NoError(t, runtimeService.RemoveContainer(cn))
+	}()
+	require.NoError(t, runtimeService.StartContainer(cn))
+	defer func() {
+		assert.NoError(t, runtimeService.StopContainer(cn, 10))
+	}()
+
+	t.Logf("Restart the container with same config")
+	require.NoError(t, runtimeService.StopContainer(cn, 10))
+	require.NoError(t, runtimeService.RemoveContainer(cn))
+
+	cn, err = runtimeService.CreateContainer(sb, containerConfig, sbConfig)
+	require.NoError(t, err)
+	require.NoError(t, runtimeService.StartContainer(cn))
+}