integration: add 'HealthClient.Check' test

Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>

integration/v3_health_test.go

@@ -0,0 +1,40 @@
+// Copyright 2017 The etcd 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 (
+	"context"
+	"testing"
+
+	"github.com/coreos/etcd/pkg/testutil"
+
+	healthpb "google.golang.org/grpc/health/grpc_health_v1"
+)
+
+func TestHealthCheck(t *testing.T) {
+	defer testutil.AfterTest(t)
+
+	clus := NewClusterV3(t, &ClusterConfig{Size: 1})
+	defer clus.Terminate(t)
+
+	cli := healthpb.NewHealthClient(clus.RandClient().ActiveConnection())
+	resp, err := cli.Check(context.TODO(), &healthpb.HealthCheckRequest{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if resp.Status != healthpb.HealthCheckResponse_SERVING {
+		t.Fatalf("status expected %s, got %s", healthpb.HealthCheckResponse_SERVING, resp.Status)
+	}
+}