forked from eapache/channels
/
channels_test.go
154 lines (125 loc) · 2.7 KB
/
channels_test.go
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
package channels
import (
"math/rand"
"testing"
"time"
)
func testChannel(t *testing.T, name string, ch Channel) {
go func() {
for i := 0; i < 1000; i++ {
ch.In() <- i
}
ch.Close()
}()
for i := 0; i < 1000; i++ {
val := <-ch.Out()
if i != val.(int) {
t.Fatal(name, "expected", i, "but got", val.(int))
}
}
}
func testChannelPair(t *testing.T, name string, in InChannel, out OutChannel) {
go func() {
for i := 0; i < 1000; i++ {
in.In() <- i
}
in.Close()
}()
for i := 0; i < 1000; i++ {
val := <-out.Out()
if i != val.(int) {
t.Fatal("pair", name, "expected", i, "but got", val.(int))
}
}
}
func TestPipe(t *testing.T) {
a := NewNativeChannel(None)
b := NewNativeChannel(None)
Pipe(a, b)
testChannelPair(t, "pipe", a, b)
}
func TestWeakPipe(t *testing.T) {
a := NewNativeChannel(None)
b := NewNativeChannel(None)
WeakPipe(a, b)
testChannelPair(t, "pipe", a, b)
}
func testMultiplex(t *testing.T, multi func(output SimpleInChannel, inputs ...SimpleOutChannel)) {
a := NewNativeChannel(None)
b := NewNativeChannel(None)
multi(b, a)
testChannelPair(t, "simple multiplex", a, b)
a = NewNativeChannel(None)
inputs := []Channel{
NewNativeChannel(None),
NewNativeChannel(None),
NewNativeChannel(None),
NewNativeChannel(None),
}
multi(a, inputs[0], inputs[1], inputs[2], inputs[3])
go func() {
rand.Seed(time.Now().Unix())
for i := 0; i < 1000; i++ {
inputs[rand.Intn(len(inputs))].In() <- i
}
for i := range inputs {
inputs[i].Close()
}
}()
for i := 0; i < 1000; i++ {
val := <-a.Out()
if i != val.(int) {
t.Fatal("multiplexing expected", i, "but got", val.(int))
}
}
}
func TestMultiplex(t *testing.T) {
testMultiplex(t, Multiplex)
}
func TestWeakMultiplex(t *testing.T) {
testMultiplex(t, WeakMultiplex)
}
func testTee(t *testing.T, tee func(input SimpleOutChannel, outputs ...SimpleInChannel)) {
a := NewNativeChannel(None)
b := NewNativeChannel(None)
tee(a, b)
testChannelPair(t, "simple tee", a, b)
a = NewNativeChannel(None)
outputs := []Channel{
NewNativeChannel(None),
NewNativeChannel(None),
NewNativeChannel(None),
NewNativeChannel(None),
}
tee(a, outputs[0], outputs[1], outputs[2], outputs[3])
go func() {
for i := 0; i < 1000; i++ {
a.In() <- i
}
a.Close()
}()
for i := 0; i < 1000; i++ {
for _, output := range outputs {
val := <-output.Out()
if i != val.(int) {
t.Fatal("teeing expected", i, "but got", val.(int))
}
}
}
}
func TestTee(t *testing.T) {
testTee(t, Tee)
}
func TestWeakTee(t *testing.T) {
testTee(t, WeakTee)
}
func ExampleChannel() {
var ch Channel
ch = NewInfiniteChannel()
for i := 0; i < 10; i++ {
ch.In() <- nil
}
for i := 0; i < 10; i++ {
<-ch.Out()
}
}