// Copyright 2015 CoreOS, Inc.
//
// 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 rafthttp

import (
	"bytes"
	"reflect"
	"testing"

	"github.com/coreos/etcd/etcdserver/stats"
	"github.com/coreos/etcd/pkg/types"
	"github.com/coreos/etcd/raft/raftpb"
)

func TestMsgApp(t *testing.T) {
	tests := []raftpb.Message{
		{
			Type:    raftpb.MsgApp,
			From:    1,
			To:      2,
			Term:    1,
			LogTerm: 1,
			Index:   3,
			Entries: []raftpb.Entry{{Term: 1, Index: 4}},
		},
		{
			Type:    raftpb.MsgApp,
			From:    1,
			To:      2,
			Term:    1,
			LogTerm: 1,
			Index:   0,
			Entries: []raftpb.Entry{
				{Term: 1, Index: 1, Data: []byte("some data")},
				{Term: 1, Index: 2, Data: []byte("some data")},
				{Term: 1, Index: 3, Data: []byte("some data")},
			},
		},
		linkHeartbeatMessage,
	}
	for i, tt := range tests {
		b := &bytes.Buffer{}
		enc := &msgAppEncoder{w: b, fs: &stats.FollowerStats{}}
		if err := enc.encode(tt); err != nil {
			t.Errorf("#%d: unexpected encode message error: %v", i, err)
			continue
		}
		dec := &msgAppDecoder{r: b, local: types.ID(tt.To), remote: types.ID(tt.From), term: tt.Term}
		m, err := dec.decode()
		if err != nil {
			t.Errorf("#%d: unexpected decode message error: %v", i, err)
			continue
		}
		if !reflect.DeepEqual(m, tt) {
			t.Errorf("#%d: message = %+v, want %+v", i, m, tt)
		}
	}
}