blob: 91d941b32ce8a547f789da965c201fdabf557901 (
plain)
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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/*
* Copyright 2016-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
package kotlinx.coroutines.channels
import kotlinx.coroutines.*
import kotlin.test.*
class BasicOperationsTest : TestBase() {
@Test
fun testSimpleSendReceive() = runTest {
// Parametrized common test :(
TestChannelKind.values().forEach { kind -> testSendReceive(kind, 20) }
}
@Test
fun testOfferAfterClose() = runTest {
TestChannelKind.values().forEach { kind -> testOffer(kind) }
}
@Test
fun testSendAfterClose() = runTest {
TestChannelKind.values().forEach { kind -> testSendAfterClose(kind) }
}
@Test
fun testReceiveOrNullAfterClose() = runTest {
TestChannelKind.values().forEach { kind -> testReceiveOrNull(kind) }
}
@Test
fun testReceiveOrNullAfterCloseWithException() = runTest {
TestChannelKind.values().forEach { kind -> testReceiveOrNullException(kind) }
}
@Test
fun testReceiveOrClosed() = runTest {
TestChannelKind.values().forEach { kind -> testReceiveOrClosed(kind) }
}
@Test
fun testInvokeOnClose() = TestChannelKind.values().forEach { kind ->
reset()
val channel = kind.create<Int>()
channel.invokeOnClose {
if (it is AssertionError) {
expect(3)
}
}
expect(1)
channel.offer(42)
expect(2)
channel.close(AssertionError())
finish(4)
}
@Test
fun testInvokeOnClosed() = TestChannelKind.values().forEach { kind ->
reset()
expect(1)
val channel = kind.create<Int>()
channel.close()
channel.invokeOnClose { expect(2) }
assertFailsWith<IllegalStateException> { channel.invokeOnClose { expect(3) } }
finish(3)
}
@Test
fun testMultipleInvokeOnClose() = TestChannelKind.values().forEach { kind ->
reset()
val channel = kind.create<Int>()
channel.invokeOnClose { expect(3) }
expect(1)
assertFailsWith<IllegalStateException> { channel.invokeOnClose { expect(4) } }
expect(2)
channel.close()
finish(4)
}
@Test
fun testIterator() = runTest {
TestChannelKind.values().forEach { kind ->
val channel = kind.create<Int>()
val iterator = channel.iterator()
assertFailsWith<IllegalStateException> { iterator.next() }
channel.close()
assertFailsWith<IllegalStateException> { iterator.next() }
assertFalse(iterator.hasNext())
}
}
private suspend fun testReceiveOrNull(kind: TestChannelKind) = coroutineScope {
val channel = kind.create<Int>()
val d = async(NonCancellable) {
channel.receive()
}
yield()
channel.close()
assertTrue(channel.isClosedForReceive)
assertNull(channel.receiveOrNull())
assertNull(channel.poll())
d.join()
assertTrue(d.getCancellationException().cause is ClosedReceiveChannelException)
}
private suspend fun testReceiveOrNullException(kind: TestChannelKind) = coroutineScope {
val channel = kind.create<Int>()
val d = async(NonCancellable) {
channel.receive()
}
yield()
channel.close(TestException())
assertTrue(channel.isClosedForReceive)
assertFailsWith<TestException> { channel.poll() }
try {
channel.receiveOrNull()
fail()
} catch (e: TestException) {
// Expected
}
d.join()
assertTrue(d.getCancellationException().cause is TestException)
}
@Suppress("ReplaceAssertBooleanWithAssertEquality")
private suspend fun testReceiveOrClosed(kind: TestChannelKind) = coroutineScope {
reset()
val channel = kind.create<Int>()
launch {
expect(2)
channel.send(1)
}
expect(1)
val result = channel.receiveOrClosed()
assertEquals(1, result.value)
assertEquals(1, result.valueOrNull)
assertTrue(ValueOrClosed.value(1) == result)
expect(3)
launch {
expect(4)
channel.close()
}
val closed = channel.receiveOrClosed()
expect(5)
assertNull(closed.valueOrNull)
assertTrue(closed.isClosed)
assertNull(closed.closeCause)
assertTrue(ValueOrClosed.closed<Int>(closed.closeCause) == closed)
finish(6)
}
private suspend fun testOffer(kind: TestChannelKind) = coroutineScope {
val channel = kind.create<Int>()
val d = async { channel.send(42) }
yield()
channel.close()
assertTrue(channel.isClosedForSend)
try {
channel.offer(2)
fail()
} catch (e: ClosedSendChannelException) {
if (!kind.isConflated) {
assertEquals(42, channel.receive())
}
}
d.await()
}
/**
* [ClosedSendChannelException] should not be eaten.
* See [https://github.com/Kotlin/kotlinx.coroutines/issues/957]
*/
private suspend fun testSendAfterClose(kind: TestChannelKind) {
assertFailsWith<ClosedSendChannelException> {
coroutineScope {
val channel = kind.create<Int>()
channel.close()
launch {
channel.send(1)
}
}
}
}
private suspend fun testSendReceive(kind: TestChannelKind, iterations: Int) = coroutineScope {
val channel = kind.create<Int>()
launch {
repeat(iterations) { channel.send(it) }
channel.close()
}
var expected = 0
for (x in channel) {
if (!kind.isConflated) {
assertEquals(expected++, x)
} else {
assertTrue(x >= expected)
expected = x + 1
}
}
if (!kind.isConflated) {
assertEquals(iterations, expected)
}
}
}
|
