blob: 4bda93214b2afd0701f42bd80bbedade1f62d811 [file] [log] [blame]
Scott Baker2c1c4822019-10-16 11:02:41 -07001// Copyright 2019 The etcd Authors
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15package raftpb
16
17import (
18 "fmt"
19 "reflect"
20 "sort"
21)
22
23// Equivalent returns a nil error if the inputs describe the same configuration.
24// On mismatch, returns a descriptive error showing the differences.
25func (cs ConfState) Equivalent(cs2 ConfState) error {
26 cs1 := cs
27 orig1, orig2 := cs1, cs2
28 s := func(sl *[]uint64) {
29 *sl = append([]uint64(nil), *sl...)
30 sort.Slice(*sl, func(i, j int) bool { return (*sl)[i] < (*sl)[j] })
31 }
32
33 for _, cs := range []*ConfState{&cs1, &cs2} {
34 s(&cs.Voters)
35 s(&cs.Learners)
36 s(&cs.VotersOutgoing)
37 s(&cs.LearnersNext)
38 cs.XXX_unrecognized = nil
39 }
40
41 if !reflect.DeepEqual(cs1, cs2) {
42 return fmt.Errorf("ConfStates not equivalent after sorting:\n%+#v\n%+#v\nInputs were:\n%+#v\n%+#v", cs1, cs2, orig1, orig2)
43 }
44 return nil
45}