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// 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 naming
import (
"context"
"encoding/json"
"reflect"
"testing"
etcd "github.com/coreos/etcd/clientv3"
"github.com/coreos/etcd/integration"
"github.com/coreos/etcd/pkg/testutil"
"google.golang.org/grpc/naming"
)
func TestGRPCResolver(t *testing.T) {
defer testutil.AfterTest(t)
clus := integration.NewClusterV3(t, &integration.ClusterConfig{Size: 1})
defer clus.Terminate(t)
r := GRPCResolver{
Client: clus.RandClient(),
}
w, err := r.Resolve("foo")
if err != nil {
t.Fatal("failed to resolve foo", err)
}
defer w.Close()
addOp := naming.Update{Op: naming.Add, Addr: "127.0.0.1", Metadata: "metadata"}
err = r.Update(context.TODO(), "foo", addOp)
if err != nil {
t.Fatal("failed to add foo", err)
}
us, err := w.Next()
if err != nil {
t.Fatal("failed to get udpate", err)
}
wu := &naming.Update{
Op: naming.Add,
Addr: "127.0.0.1",
Metadata: "metadata",
}
if !reflect.DeepEqual(us[0], wu) {
t.Fatalf("up = %#v, want %#v", us[0], wu)
}
delOp := naming.Update{Op: naming.Delete, Addr: "127.0.0.1"}
err = r.Update(context.TODO(), "foo", delOp)
if err != nil {
t.Fatalf("failed to udpate %v", err)
}
us, err = w.Next()
if err != nil {
t.Fatalf("failed to get udpate %v", err)
}
wu = &naming.Update{
Op: naming.Delete,
Addr: "127.0.0.1",
Metadata: "metadata",
}
if !reflect.DeepEqual(us[0], wu) {
t.Fatalf("up = %#v, want %#v", us[0], wu)
}
}
// TestGRPCResolverMulti ensures the resolver will initialize
// correctly with multiple hosts and correctly receive multiple
// updates in a single revision.
func TestGRPCResolverMulti(t *testing.T) {
defer testutil.AfterTest(t)
clus := integration.NewClusterV3(t, &integration.ClusterConfig{Size: 1})
defer clus.Terminate(t)
c := clus.RandClient()
v, verr := json.Marshal(naming.Update{Addr: "127.0.0.1", Metadata: "md"})
if verr != nil {
t.Fatal(verr)
}
if _, err := c.Put(context.TODO(), "foo/host", string(v)); err != nil {
t.Fatal(err)
}
if _, err := c.Put(context.TODO(), "foo/host2", string(v)); err != nil {
t.Fatal(err)
}
r := GRPCResolver{c}
w, err := r.Resolve("foo")
if err != nil {
t.Fatal("failed to resolve foo", err)
}
defer w.Close()
updates, nerr := w.Next()
if nerr != nil {
t.Fatal(nerr)
}
if len(updates) != 2 {
t.Fatalf("expected two updates, got %+v", updates)
}
_, err = c.Txn(context.TODO()).Then(etcd.OpDelete("foo/host"), etcd.OpDelete("foo/host2")).Commit()
if err != nil {
t.Fatal(err)
}
updates, nerr = w.Next()
if nerr != nil {
t.Fatal(nerr)
}
if len(updates) != 2 || (updates[0].Op != naming.Delete && updates[1].Op != naming.Delete) {
t.Fatalf("expected two updates, got %+v", updates)
}
}