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
|
package kotlinx.coroutines.reactor
import kotlinx.coroutines.*
import kotlinx.coroutines.flow.*
import kotlinx.coroutines.reactive.*
import org.junit.Test
import org.reactivestreams.*
import reactor.core.publisher.*
import reactor.util.context.Context
import java.util.concurrent.*
import kotlin.test.*
@Suppress("ReactiveStreamsSubscriberImplementation")
class FlowAsFluxTest : TestBase() {
@Test
fun testFlowAsFluxContextPropagation() {
val flux = flow<String> {
(1..4).forEach { i -> emit(createMono(i).awaitFirst()) }
}
.asFlux()
.contextWrite(Context.of(1, "1"))
.contextWrite(Context.of(2, "2", 3, "3", 4, "4"))
val list = flux.collectList().block()!!
assertEquals(listOf("1", "2", "3", "4"), list)
}
private fun createMono(i: Int): Mono<String> = mono {
val ctx = coroutineContext[ReactorContext]!!.context
ctx.getOrDefault(i, "noValue")
}
@Test
fun testFluxAsFlowContextPropagationWithFlowOn() = runTest {
expect(1)
Flux.create<String> {
it.next("OK")
it.complete()
}
.contextWrite { ctx ->
expect(2)
assertEquals("CTX", ctx.get(1))
ctx
}
.asFlow()
.flowOn(ReactorContext(Context.of(1, "CTX")))
.collect {
expect(3)
assertEquals("OK", it)
}
finish(4)
}
@Test
fun testFluxAsFlowContextPropagationFromScope() = runTest {
expect(1)
withContext(ReactorContext(Context.of(1, "CTX"))) {
Flux.create<String> {
it.next("OK")
it.complete()
}
.contextWrite { ctx ->
expect(2)
assertEquals("CTX", ctx.get(1))
ctx
}
.asFlow()
.collect {
expect(3)
assertEquals("OK", it)
}
}
finish(4)
}
@Test
fun testUnconfinedDefaultContext() {
expect(1)
val thread = Thread.currentThread()
fun checkThread() {
assertSame(thread, Thread.currentThread())
}
flowOf(42).asFlux().subscribe(object : Subscriber<Int> {
private lateinit var subscription: Subscription
override fun onSubscribe(s: Subscription) {
expect(2)
subscription = s
subscription.request(2)
}
override fun onNext(t: Int) {
checkThread()
expect(3)
assertEquals(42, t)
}
override fun onComplete() {
checkThread()
expect(4)
}
override fun onError(t: Throwable?) {
expectUnreached()
}
})
finish(5)
}
@Test
fun testConfinedContext() {
expect(1)
val threadName = "FlowAsFluxTest.testConfinedContext"
fun checkThread() {
val currentThread = Thread.currentThread()
assertTrue(currentThread.name.startsWith(threadName), "Unexpected thread $currentThread")
}
val completed = CountDownLatch(1)
newSingleThreadContext(threadName).use { dispatcher ->
flowOf(42).asFlux(dispatcher).subscribe(object : Subscriber<Int> {
private lateinit var subscription: Subscription
override fun onSubscribe(s: Subscription) {
expect(2)
subscription = s
subscription.request(2)
}
override fun onNext(t: Int) {
checkThread()
expect(3)
assertEquals(42, t)
}
override fun onComplete() {
checkThread()
expect(4)
completed.countDown()
}
override fun onError(t: Throwable?) {
expectUnreached()
}
})
completed.await()
}
finish(5)
}
}
|
