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
|
package xgb
import (
"errors"
"io"
"net"
"runtime"
"testing"
"time"
)
type addr struct{}
func (_ addr) Network() string { return "" }
func (_ addr) String() string { return "" }
type server struct {
control chan interface{}
done chan struct{}
}
func newServer() net.Conn {
s := &server{
make(chan interface{}),
make(chan struct{}),
}
go func() {
defer close(s.done)
for {
select {
case ci := <-s.control:
if ci == nil {
return
}
}
}
}()
return s
}
func (_ *server) errClosed() error {
return errors.New("closed")
}
func (_ *server) errEOF() error {
return io.EOF
}
func (s *server) Write(b []byte) (int, error) {
select {
case <-s.done:
}
return 0, s.errClosed()
}
func (s *server) Read(b []byte) (int, error) {
select {
case <-s.done:
}
return 0, s.errEOF()
}
func (s *server) Close() error {
select {
case s.control <- nil:
<-s.done
return nil
case <-s.done:
return s.errClosed()
}
}
func (s *server) LocalAddr() net.Addr { return addr{} }
func (s *server) RemoteAddr() net.Addr { return addr{} }
func (s *server) SetDeadline(t time.Time) error { return nil }
func (s *server) SetReadDeadline(t time.Time) error { return nil }
func (s *server) SetWriteDeadline(t time.Time) error { return nil }
func TestConnOpenClose(t *testing.T) {
ngrs := runtime.NumGoroutine()
t.Logf("creating new dummy blocking server")
s := newServer()
defer func() {
if err := s.Close(); err != nil {
t.Errorf("server closing error: %v", err)
}
}()
t.Logf("new server created: %v", s)
leakTimeout := time.Second
defer func() {
if ngre := runtime.NumGoroutine(); ngrs != ngre {
t.Logf("possible goroutine leakage, waiting %v", leakTimeout)
time.Sleep(time.Second)
if ngre := runtime.NumGoroutine(); ngrs != ngre {
t.Errorf("goroutine leaks: start(%d) != end(%d)", ngrs, ngre)
}
}
}()
c, err := postNewConn(&Conn{conn: s})
if err != nil {
t.Fatalf("connect error: %v", err)
}
t.Logf("connection to server created: %v", c)
closeErr := make(chan error, 1)
closeTimeout := time.Second
select {
case closeErr <- func() error {
t.Logf("closing connection to server")
c.Close()
t.Logf("connection to server closed")
return nil
}():
case <-time.After(closeTimeout):
t.Errorf("*Conn.Close() not responded for %v", closeTimeout)
}
}
|
