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
|
// Copyright 2018 Google LLC
//
// 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 sync
import (
"reflect"
"testing"
"time"
)
func TestSeqCountWriteUncontended(t *testing.T) {
var seq SeqCount
seq.BeginWrite()
seq.EndWrite()
}
func TestSeqCountReadUncontended(t *testing.T) {
var seq SeqCount
epoch := seq.BeginRead()
if !seq.ReadOk(epoch) {
t.Errorf("ReadOk: got false, wanted true")
}
}
func TestSeqCountBeginReadAfterWrite(t *testing.T) {
var seq SeqCount
var data int32
const want = 1
seq.BeginWrite()
data = want
seq.EndWrite()
epoch := seq.BeginRead()
if data != want {
t.Errorf("Reader: got %v, wanted %v", data, want)
}
if !seq.ReadOk(epoch) {
t.Errorf("ReadOk: got false, wanted true")
}
}
func TestSeqCountBeginReadDuringWrite(t *testing.T) {
var seq SeqCount
var data int
const want = 1
seq.BeginWrite()
go func() {
time.Sleep(time.Second)
data = want
seq.EndWrite()
}()
epoch := seq.BeginRead()
if data != want {
t.Errorf("Reader: got %v, wanted %v", data, want)
}
if !seq.ReadOk(epoch) {
t.Errorf("ReadOk: got false, wanted true")
}
}
func TestSeqCountReadOkAfterWrite(t *testing.T) {
var seq SeqCount
epoch := seq.BeginRead()
seq.BeginWrite()
seq.EndWrite()
if seq.ReadOk(epoch) {
t.Errorf("ReadOk: got true, wanted false")
}
}
func TestSeqCountReadOkDuringWrite(t *testing.T) {
var seq SeqCount
epoch := seq.BeginRead()
seq.BeginWrite()
if seq.ReadOk(epoch) {
t.Errorf("ReadOk: got true, wanted false")
}
seq.EndWrite()
}
func BenchmarkSeqCountWriteUncontended(b *testing.B) {
var seq SeqCount
for i := 0; i < b.N; i++ {
seq.BeginWrite()
seq.EndWrite()
}
}
func BenchmarkSeqCountReadUncontended(b *testing.B) {
var seq SeqCount
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
epoch := seq.BeginRead()
if !seq.ReadOk(epoch) {
b.Fatalf("ReadOk: got false, wanted true")
}
}
})
}
func TestPointersInType(t *testing.T) {
for _, test := range []struct {
name string // used for both test and value name
val interface{}
ptrs []string
}{
{
name: "EmptyStruct",
val: struct{}{},
},
{
name: "Int",
val: int(0),
},
{
name: "MixedStruct",
val: struct {
b bool
I int
ExportedPtr *struct{}
unexportedPtr *struct{}
arr [2]int
ptrArr [2]*int
nestedStruct struct {
nestedNonptr int
nestedPtr *int
}
structArr [1]struct {
nonptr int
ptr *int
}
}{},
ptrs: []string{
"MixedStruct.ExportedPtr",
"MixedStruct.unexportedPtr",
"MixedStruct.ptrArr[]",
"MixedStruct.nestedStruct.nestedPtr",
"MixedStruct.structArr[].ptr",
},
},
} {
t.Run(test.name, func(t *testing.T) {
typ := reflect.TypeOf(test.val)
ptrs := PointersInType(typ, test.name)
t.Logf("Found pointers: %v", ptrs)
if (len(ptrs) != 0 || len(test.ptrs) != 0) && !reflect.DeepEqual(ptrs, test.ptrs) {
t.Errorf("Got %v, wanted %v", ptrs, test.ptrs)
}
})
}
}
|
