etcd/pkg/mock/mockserver/mockserver.go
Joe Betz 657c2e15cc *: introduce mock server for testing load balancing and add a simple happy-path load balancer test
Author:    Joe Betz <jpbetz@google.com>
Date:      Wed Mar 28 15:51:33 2018 -0700
2018-06-15 13:41:28 -07:00

91 lines
2.5 KiB
Go

// Copyright 2018 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 mockserver
import (
"context"
"fmt"
"net"
pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
"google.golang.org/grpc"
)
// MockServer provides a mocked out grpc server of the etcdserver interface.
type MockServer struct {
GrpcServer *grpc.Server
Address string
}
// MockServers provides a cluster of mocket out gprc servers of the etcdserver interface.
type MockServers []*MockServer
// StartMockServers creates the desired count of mock servers
// and starts them.
func StartMockServers(count int) (svrs MockServers, err error) {
svrs = make(MockServers, count)
defer func() {
if err != nil {
svrs.Stop()
}
}()
for i := 0; i < count; i++ {
listener, err := net.Listen("tcp", "localhost:0")
if err != nil {
return nil, fmt.Errorf("failed to listen %v", err)
}
svr := grpc.NewServer()
pb.RegisterKVServer(svr, &mockKVServer{})
svrs[i] = &MockServer{GrpcServer: svr, Address: listener.Addr().String()}
go func(svr *grpc.Server, l net.Listener) {
svr.Serve(l)
}(svr, listener)
}
return svrs, nil
}
// Stop stops the mock server, immediately closing all open connections and listeners.
func (svrs MockServers) Stop() {
for _, svr := range svrs {
svr.GrpcServer.Stop()
}
}
type mockKVServer struct{}
func (m *mockKVServer) Range(context.Context, *pb.RangeRequest) (*pb.RangeResponse, error) {
return &pb.RangeResponse{}, nil
}
func (m *mockKVServer) Put(context.Context, *pb.PutRequest) (*pb.PutResponse, error) {
return &pb.PutResponse{}, nil
}
func (m *mockKVServer) DeleteRange(context.Context, *pb.DeleteRangeRequest) (*pb.DeleteRangeResponse, error) {
return &pb.DeleteRangeResponse{}, nil
}
func (m *mockKVServer) Txn(context.Context, *pb.TxnRequest) (*pb.TxnResponse, error) {
return &pb.TxnResponse{}, nil
}
func (m *mockKVServer) Compact(context.Context, *pb.CompactionRequest) (*pb.CompactionResponse, error) {
return &pb.CompactionResponse{}, nil
}