proxy: initial grpc kv service proxy

proxy/grpcproxy/kv_test.go

@@ -0,0 +1,95 @@
+// Copyright 2016 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 grpcproxy
+
+import (
+	"net"
+	"testing"
+	"time"
+
+	"github.com/coreos/etcd/clientv3"
+	pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
+	"github.com/coreos/etcd/integration"
+	"github.com/coreos/etcd/pkg/testutil"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+)
+
+func TestKVProxyRange(t *testing.T) {
+	defer testutil.AfterTest(t)
+
+	clus := integration.NewClusterV3(t, &integration.ClusterConfig{Size: 1})
+	defer clus.Terminate(t)
+
+	kvts := newKVProxyServer([]string{clus.Members[0].GRPCAddr()}, t)
+	defer kvts.close()
+
+	// create a client and try to get key from proxy.
+	cfg := clientv3.Config{
+		Endpoints:   []string{kvts.l.Addr().String()},
+		DialTimeout: 5 * time.Second,
+	}
+	client, err := clientv3.New(cfg)
+	if err != nil {
+		t.Fatalf("err = %v, want nil")
+	}
+	_, err = client.Get(context.Background(), "foo")
+	if err != nil {
+		t.Fatalf("err = %v, want nil")
+	}
+}
+
+type kvproxyTestServer struct {
+	kp     *kvProxy
+	server *grpc.Server
+	l      net.Listener
+}
+
+func (kts *kvproxyTestServer) close() {
+	kts.server.Stop()
+	kts.l.Close()
+	kts.kp.Close()
+}
+
+func newKVProxyServer(endpoints []string, t *testing.T) *kvproxyTestServer {
+	cfg := clientv3.Config{
+		Endpoints:   endpoints,
+		DialTimeout: 5 * time.Second,
+	}
+	client, err := clientv3.New(cfg)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	kvp := NewKvProxy(client)
+
+	kvts := &kvproxyTestServer{
+		kp: kvp,
+	}
+
+	var opts []grpc.ServerOption
+	kvts.server = grpc.NewServer(opts...)
+	pb.RegisterKVServer(kvts.server, kvts.kp)
+
+	kvts.l, err = net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	go kvts.server.Serve(kvts.l)
+
+	return kvts
+}