Add RuntimeHandler into PodSandbox and PodSandboxStatus

The upstream CRI change: https://github.com/kubernetes/kubernetes/pull/73833

Signed-off-by: Haiyan Meng <haiyanmeng@google.com>

integration/runtime_handler_test.go

@@ -0,0 +1,50 @@
+/*
+Copyright 2019 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 integration
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	runtime "k8s.io/kubernetes/pkg/kubelet/apis/cri/runtime/v1alpha2"
+)
+
+func TestRuntimeHandler(t *testing.T) {
+	t.Logf("Create a sandbox")
+	sbConfig := PodSandboxConfig("sandbox", "test-runtime-handler")
+	t.Logf("the --runtime-handler flag value is: %s", *runtimeHandler)
+	sb, err := runtimeService.RunPodSandbox(sbConfig, *runtimeHandler)
+	require.NoError(t, err)
+	defer func() {
+		// Make sure the sandbox is cleaned up in any case.
+		runtimeService.StopPodSandbox(sb)
+		runtimeService.RemovePodSandbox(sb)
+	}()
+
+	t.Logf("Verify runtimeService.PodSandboxStatus sets RuntimeHandler")
+	sbStatus, err := runtimeService.PodSandboxStatus(sb)
+	require.NoError(t, err)
+	t.Logf("runtimeService.PodSandboxStatus sets RuntimeHandler to %s", sbStatus.RuntimeHandler)
+	assert.Equal(t, *runtimeHandler, sbStatus.RuntimeHandler)
+
+	t.Logf("Verify runtimeService.ListPodSandbox sets RuntimeHandler")
+	sandboxes, err := runtimeService.ListPodSandbox(&runtime.PodSandboxFilter{})
+	require.NoError(t, err)
+	t.Logf("runtimeService.ListPodSandbox sets RuntimeHandler to %s", sbStatus.RuntimeHandler)
+	assert.Equal(t, *runtimeHandler, sandboxes[0].RuntimeHandler)
+}