clientv3/integration: test 'SetEndpoints'

clientv3/integration/dial_test.go

@@ -0,0 +1,60 @@
+// 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 integration
+
+import (
+	"math/rand"
+	"testing"
+	"time"
+
+	"github.com/coreos/etcd/clientv3"
+	"github.com/coreos/etcd/integration"
+	"github.com/coreos/etcd/pkg/testutil"
+	"golang.org/x/net/context"
+)
+
+// TestDialSetEndpoints ensures SetEndpoints can replace unavailable endpoints with available ones.
+func TestDialSetEndpoints(t *testing.T) {
+	defer testutil.AfterTest(t)
+	clus := integration.NewClusterV3(t, &integration.ClusterConfig{Size: 3})
+	defer clus.Terminate(t)
+
+	// get endpoint list
+	eps := make([]string, 3)
+	for i := range eps {
+		eps[i] = clus.Members[i].GRPCAddr()
+	}
+	toKill := rand.Intn(len(eps))
+
+	cfg := clientv3.Config{Endpoints: []string{eps[toKill]}, DialTimeout: 1 * time.Second}
+	cli, err := clientv3.New(cfg)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer cli.Close()
+
+	// make a dead node
+	clus.Members[toKill].Stop(t)
+	clus.WaitLeader(t)
+
+	// update client with available endpoints
+	cli.SetEndpoints(eps[(toKill+1)%3])
+
+	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+	if _, err = cli.Get(ctx, "foo", clientv3.WithSerializable()); err != nil {
+		t.Fatal(err)
+	}
+	cancel()
+}