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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package event
import (
"math/rand"
"sync"
"testing"
"time"
)
type testEvent int
func TestSubCloseUnsub(t *testing.T) {
// the point of this test is **not** to panic
var mux TypeMux
mux.Stop()
sub := mux.Subscribe(int(0))
sub.Unsubscribe()
}
func TestSub(t *testing.T) {
mux := new(TypeMux)
defer mux.Stop()
sub := mux.Subscribe(testEvent(0))
go func() {
if err := mux.Post(testEvent(5)); err != nil {
t.Errorf("Post returned unexpected error: %v", err)
}
}()
ev := <-sub.Chan()
if ev.Data.(testEvent) != testEvent(5) {
t.Errorf("Got %v (%T), expected event %v (%T)",
ev, ev, testEvent(5), testEvent(5))
}
}
func TestMuxErrorAfterStop(t *testing.T) {
mux := new(TypeMux)
mux.Stop()
sub := mux.Subscribe(testEvent(0))
if _, isopen := <-sub.Chan(); isopen {
t.Errorf("subscription channel was not closed")
}
if err := mux.Post(testEvent(0)); err != ErrMuxClosed {
t.Errorf("Post error mismatch, got: %s, expected: %s", err, ErrMuxClosed)
}
}
func TestUnsubscribeUnblockPost(t *testing.T) {
mux := new(TypeMux)
defer mux.Stop()
sub := mux.Subscribe(testEvent(0))
unblocked := make(chan bool)
go func() {
mux.Post(testEvent(5))
unblocked <- true
}()
select {
case <-unblocked:
t.Errorf("Post returned before Unsubscribe")
default:
sub.Unsubscribe()
<-unblocked
}
}
func TestSubscribeDuplicateType(t *testing.T) {
mux := new(TypeMux)
expected := "event: duplicate type event.testEvent in Subscribe"
defer func() {
err := recover()
if err == nil {
t.Errorf("Subscribe didn't panic for duplicate type")
} else if err != expected {
t.Errorf("panic mismatch: got %#v, expected %#v", err, expected)
}
}()
mux.Subscribe(testEvent(1), testEvent(2))
}
func TestMuxConcurrent(t *testing.T) {
rand.Seed(time.Now().Unix())
mux := new(TypeMux)
defer mux.Stop()
recv := make(chan int)
poster := func() {
for {
err := mux.Post(testEvent(0))
if err != nil {
return
}
}
}
sub := func(i int) {
time.Sleep(time.Duration(rand.Intn(99)) * time.Millisecond)
sub := mux.Subscribe(testEvent(0))
<-sub.Chan()
sub.Unsubscribe()
recv <- i
}
go poster()
go poster()
go poster()
nsubs := 1000
for i := 0; i < nsubs; i++ {
go sub(i)
}
// wait until everyone has been served
counts := make(map[int]int, nsubs)
for i := 0; i < nsubs; i++ {
counts[<-recv]++
}
for i, count := range counts {
if count != 1 {
t.Errorf("receiver %d called %d times, expected only 1 call", i, count)
}
}
}
func emptySubscriber(mux *TypeMux, types ...interface{}) {
s := mux.Subscribe(testEvent(0))
go func() {
for range s.Chan() {
}
}()
}
func BenchmarkPost3(b *testing.B) {
var mux = new(TypeMux)
defer mux.Stop()
emptySubscriber(mux, testEvent(0))
emptySubscriber(mux, testEvent(0))
emptySubscriber(mux, testEvent(0))
for i := 0; i < b.N; i++ {
mux.Post(testEvent(0))
}
}
func BenchmarkPostConcurrent(b *testing.B) {
var mux = new(TypeMux)
defer mux.Stop()
emptySubscriber(mux, testEvent(0))
emptySubscriber(mux, testEvent(0))
emptySubscriber(mux, testEvent(0))
var wg sync.WaitGroup
poster := func() {
for i := 0; i < b.N; i++ {
mux.Post(testEvent(0))
}
wg.Done()
}
wg.Add(5)
for i := 0; i < 5; i++ {
go poster()
}
wg.Wait()
}
// for comparison
func BenchmarkChanSend(b *testing.B) {
c := make(chan interface{})
closed := make(chan struct{})
go func() {
for range c {
}
}()
for i := 0; i < b.N; i++ {
select {
case c <- i:
case <-closed:
}
}
}
|
