Add unit test.

Signed-off-by: Lantao Liu <lantaol@google.com>

pkg/server/status_test.go

@@ -0,0 +1,97 @@
+/*
+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 server
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/golang/mock/gomock"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"golang.org/x/net/context"
+	healthapi "google.golang.org/grpc/health/grpc_health_v1"
+	runtime "k8s.io/kubernetes/pkg/kubelet/apis/cri/v1alpha1"
+
+	servertesting "github.com/kubernetes-incubator/cri-containerd/pkg/server/testing"
+)
+
+func TestStatus(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+	for desc, test := range map[string]struct {
+		containerdCheckRes *healthapi.HealthCheckResponse
+		containerdCheckErr error
+		networkStatusErr   error
+
+		expectRuntimeNotReady bool
+		expectNetworkNotReady bool
+	}{
+		"runtime should not be ready when containerd is not serving": {
+			containerdCheckRes: &healthapi.HealthCheckResponse{
+				Status: healthapi.HealthCheckResponse_NOT_SERVING,
+			},
+			expectRuntimeNotReady: true,
+		},
+		"runtime should not be ready when containerd healthcheck returns error": {
+			containerdCheckErr:    errors.New("healthcheck error"),
+			expectRuntimeNotReady: true,
+		},
+		"network should not be ready when network plugin status returns error": {
+			containerdCheckRes: &healthapi.HealthCheckResponse{
+				Status: healthapi.HealthCheckResponse_SERVING,
+			},
+			networkStatusErr:      errors.New("status error"),
+			expectNetworkNotReady: true,
+		},
+		"runtime should be ready when containerd is serving": {
+			containerdCheckRes: &healthapi.HealthCheckResponse{
+				Status: healthapi.HealthCheckResponse_SERVING,
+			},
+		},
+	} {
+		t.Logf("TestCase %q", desc)
+		c := newTestCRIContainerdService()
+		ctx := context.Background()
+		mock := servertesting.NewMockHealthClient(ctrl)
+		mock.EXPECT().Check(ctx, &healthapi.HealthCheckRequest{}).Return(
+			test.containerdCheckRes, test.containerdCheckErr)
+		c.healthService = mock
+		if test.networkStatusErr != nil {
+			c.netPlugin.(*servertesting.FakeCNIPlugin).InjectError(
+				"Status", test.networkStatusErr)
+		}
+
+		resp, err := c.Status(ctx, &runtime.StatusRequest{})
+		assert.NoError(t, err)
+		require.NotNil(t, resp)
+		runtimeCondition := resp.Status.Conditions[0]
+		networkCondition := resp.Status.Conditions[1]
+		assert.Equal(t, runtime.RuntimeReady, runtimeCondition.Type)
+		assert.Equal(t, test.expectRuntimeNotReady, !runtimeCondition.Status)
+		if test.expectRuntimeNotReady {
+			assert.Equal(t, runtimeNotReadyReason, runtimeCondition.Reason)
+			assert.NotEmpty(t, runtimeCondition.Message)
+		}
+		assert.Equal(t, runtime.NetworkReady, networkCondition.Type)
+		assert.Equal(t, test.expectNetworkNotReady, !networkCondition.Status)
+		if test.expectNetworkNotReady {
+			assert.Equal(t, networkNotReadyReason, networkCondition.Reason)
+			assert.NotEmpty(t, networkCondition.Message)
+		}
+	}
+}