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
|
package p2p
import (
"bytes"
"encoding/hex"
"fmt"
"io"
"runtime"
"strings"
"testing"
"time"
)
func ExampleMsgPipe() {
rw1, rw2 := MsgPipe()
go func() {
Send(rw1, 8, [][]byte{{0, 0}})
Send(rw1, 5, [][]byte{{1, 1}})
rw1.Close()
}()
for {
msg, err := rw2.ReadMsg()
if err != nil {
break
}
var data [][]byte
msg.Decode(&data)
fmt.Printf("msg: %d, %x\n", msg.Code, data[0])
}
// Output:
// msg: 8, 0000
// msg: 5, 0101
}
func TestMsgPipeUnblockWrite(t *testing.T) {
loop:
for i := 0; i < 100; i++ {
rw1, rw2 := MsgPipe()
done := make(chan struct{})
go func() {
if err := SendItems(rw1, 1); err == nil {
t.Error("EncodeMsg returned nil error")
} else if err != ErrPipeClosed {
t.Error("EncodeMsg returned wrong error: got %v, want %v", err, ErrPipeClosed)
}
close(done)
}()
// this call should ensure that EncodeMsg is waiting to
// deliver sometimes. if this isn't done, Close is likely to
// be executed before EncodeMsg starts and then we won't test
// all the cases.
runtime.Gosched()
rw2.Close()
select {
case <-done:
case <-time.After(200 * time.Millisecond):
t.Errorf("write didn't unblock")
break loop
}
}
}
// This test should panic if concurrent close isn't implemented correctly.
func TestMsgPipeConcurrentClose(t *testing.T) {
rw1, _ := MsgPipe()
for i := 0; i < 10; i++ {
go rw1.Close()
}
}
func TestEOFSignal(t *testing.T) {
rb := make([]byte, 10)
// empty reader
eof := make(chan struct{}, 1)
sig := &eofSignal{new(bytes.Buffer), 0, eof}
if n, err := sig.Read(rb); n != 0 || err != io.EOF {
t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
}
select {
case <-eof:
default:
t.Error("EOF chan not signaled")
}
// count before error
eof = make(chan struct{}, 1)
sig = &eofSignal{bytes.NewBufferString("aaaaaaaa"), 4, eof}
if n, err := sig.Read(rb); n != 4 || err != nil {
t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
}
select {
case <-eof:
default:
t.Error("EOF chan not signaled")
}
// error before count
eof = make(chan struct{}, 1)
sig = &eofSignal{bytes.NewBufferString("aaaa"), 999, eof}
if n, err := sig.Read(rb); n != 4 || err != nil {
t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
}
if n, err := sig.Read(rb); n != 0 || err != io.EOF {
t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
}
select {
case <-eof:
default:
t.Error("EOF chan not signaled")
}
// no signal if neither occurs
eof = make(chan struct{}, 1)
sig = &eofSignal{bytes.NewBufferString("aaaaaaaaaaaaaaaaaaaaa"), 999, eof}
if n, err := sig.Read(rb); n != 10 || err != nil {
t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
}
select {
case <-eof:
t.Error("unexpected EOF signal")
default:
}
}
func unhex(str string) []byte {
b, err := hex.DecodeString(strings.Replace(str, "\n", "", -1))
if err != nil {
panic(fmt.Sprintf("invalid hex string: %q", str))
}
return b
}
|
