1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
// Copyright 2017 Canonical Ltd.
//
// 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 network_test
import (
"strconv"
"testing"
"github.com/CanonicalLtd/raft-test/internal/logging"
"github.com/CanonicalLtd/raft-test/internal/network"
"github.com/hashicorp/raft"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestNetwork_FaultyEnqueue(t *testing.T) {
transports := newTransports(2)
network := network.New(logging.New(t, "DEBUG"))
for i, transport := range transports {
network.Add(itoID(i), transport)
}
network.Electing("0")
transport := network.Transport("0")
// The follower consume RPCs.
go func() {
resp := &raft.AppendEntriesResponse{
Term: 1,
LastLog: 0,
Success: true,
}
rpc := <-network.Transport("1").Consumer()
rpc.Respond(resp, nil)
}()
// Append a first noop log entry, as all newly elected leaders do.
args := &raft.AppendEntriesRequest{
Entries: []*raft.Log{{Index: 1, Term: 1, Type: raft.LogNoop}},
}
resp := &raft.AppendEntriesResponse{}
err := transport.AppendEntries("1", "1", args, resp)
require.NoError(t, err)
require.True(t, network.HasAppendedLogsFromTo("0", "1"))
event := network.ScheduleEnqueueFailure("0", 1)
// Asynchronously handle the event by disconnecting the transport.
go func() {
<-event.Watch()
network.Deposing("0")
event.Ack()
}()
// Append further entries using a pipeline, as a leader would do after
// the first no-op command.
pipeline, err := transport.AppendEntriesPipeline("1", "1")
require.NoError(t, err)
args = &raft.AppendEntriesRequest{
Entries: []*raft.Log{{Type: raft.LogCommand}},
}
resp = &raft.AppendEntriesResponse{}
_, err = pipeline.AppendEntries(args, resp)
assert.EqualError(t, err, "cannot reach server 1")
}
// Create n connected InmemTransport's.
func newTransports(n int) []*raft.InmemTransport {
// Create the in-memory transports, with addresses "0", "1", etc.
transports := make([]*raft.InmemTransport, n)
for i := 0; i < n; i++ {
_, transports[i] = raft.NewInmemTransport(itoAddr(i))
}
// Connect the in-memory transports to each other
for i, t1 := range transports {
for j, t2 := range transports {
if i != j {
t1.Connect(t2.LocalAddr(), t2)
t2.Connect(t1.LocalAddr(), t1)
}
}
}
return transports
}
// Convert an integer to a server ID.
func itoID(i int) raft.ServerID {
return raft.ServerID(strconv.Itoa(i))
}
// Convert an integer to a server address.
func itoAddr(i int) raft.ServerAddress {
return raft.ServerAddress(strconv.Itoa(i))
}
|
