-
Notifications
You must be signed in to change notification settings - Fork 38.7k
/
ready_test.go
183 lines (170 loc) · 4.02 KB
/
ready_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
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
/*
Copyright 2022 The Kubernetes Authors.
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 cacher
import (
"context"
"sync"
"testing"
"time"
)
func Test_newReady(t *testing.T) {
errCh := make(chan error, 10)
ready := newReady()
ready.set(false)
// create 10 goroutines waiting for ready
for i := 0; i < 10; i++ {
go func() {
errCh <- ready.wait(context.Background())
}()
}
select {
case <-time.After(1 * time.Second):
case <-errCh:
t.Errorf("ready should be blocking")
}
ready.set(true)
for i := 0; i < 10; i++ {
if err := <-errCh; err != nil {
t.Errorf("unexpected error on channel %d", i)
}
}
}
func Test_newReadySetIdempotent(t *testing.T) {
errCh := make(chan error, 10)
ready := newReady()
ready.set(false)
ready.set(false)
ready.set(false)
ready.set(true)
ready.set(true)
ready.set(true)
ready.set(false)
// create 10 goroutines waiting for ready and stop
for i := 0; i < 10; i++ {
go func() {
errCh <- ready.wait(context.Background())
}()
}
select {
case <-time.After(1 * time.Second):
case <-errCh:
t.Errorf("ready should be blocking")
}
ready.set(true)
for i := 0; i < 10; i++ {
if err := <-errCh; err != nil {
t.Errorf("unexpected error on channel %d", i)
}
}
}
// Test_newReadyRacy executes all the possible transitions randomly.
// It must run with the race detector enabled.
func Test_newReadyRacy(t *testing.T) {
concurrency := 1000
errCh := make(chan error, concurrency)
ready := newReady()
ready.set(false)
wg := sync.WaitGroup{}
wg.Add(2 * concurrency)
for i := 0; i < concurrency; i++ {
go func() {
errCh <- ready.wait(context.Background())
}()
go func() {
defer wg.Done()
ready.set(false)
}()
go func() {
defer wg.Done()
ready.set(true)
}()
}
// Last one has to be set to true.
wg.Wait()
ready.set(true)
for i := 0; i < concurrency; i++ {
if err := <-errCh; err != nil {
t.Errorf("unexpected error %v on channel %d", err, i)
}
}
}
func Test_newReadyStop(t *testing.T) {
errCh := make(chan error, 10)
ready := newReady()
ready.set(false)
// create 10 goroutines waiting for ready and stop
for i := 0; i < 10; i++ {
go func() {
errCh <- ready.wait(context.Background())
}()
}
select {
case <-time.After(1 * time.Second):
case <-errCh:
t.Errorf("ready should be blocking")
}
ready.stop()
for i := 0; i < 10; i++ {
if err := <-errCh; err == nil {
t.Errorf("unexpected success on channel %d", i)
}
}
}
func Test_newReadyCheck(t *testing.T) {
ready := newReady()
// it starts as false
if ready.check() {
t.Errorf("unexpected ready state %v", ready.check())
}
ready.set(true)
if !ready.check() {
t.Errorf("unexpected ready state %v", ready.check())
}
// stop sets ready to false
ready.stop()
if ready.check() {
t.Errorf("unexpected ready state %v", ready.check())
}
// can not set to true if is stopped
ready.set(true)
if ready.check() {
t.Errorf("unexpected ready state %v", ready.check())
}
err := ready.wait(context.Background())
if err == nil {
t.Errorf("expected error waiting on a stopped state")
}
}
func Test_newReadyCancelPending(t *testing.T) {
errCh := make(chan error, 10)
ready := newReady()
ready.set(false)
ctx, cancel := context.WithCancel(context.Background())
// create 10 goroutines stuck on pending
for i := 0; i < 10; i++ {
go func() {
errCh <- ready.wait(ctx)
}()
}
select {
case <-time.After(1 * time.Second):
case <-errCh:
t.Errorf("ready should be blocking")
}
cancel()
for i := 0; i < 10; i++ {
if err := <-errCh; err == nil {
t.Errorf("unexpected success on channel %d", i)
}
}
}