| Roman Elizarov | 7b2d8b0 | 2017-02-02 20:09:14 +0300 | [diff] [blame^] | 1 | package kotlinx.coroutines.experimental.channels |
| 2 | |
| 3 | import kotlinx.coroutines.experimental.* |
| 4 | import org.junit.Test |
| 5 | import kotlin.test.assertEquals |
| 6 | import kotlin.test.assertFalse |
| 7 | import kotlin.test.assertTrue |
| 8 | |
| 9 | class ArrayChannelTest : TestBase() { |
| 10 | @Test |
| 11 | fun testSimple() = runBlocking { |
| 12 | val q = ArrayChannel<Int>(1) |
| 13 | check(q.isEmpty && !q.isFull) |
| 14 | expect(1) |
| 15 | val sender = launch(context) { |
| 16 | expect(4) |
| 17 | q.send(1) // success -- buffered |
| 18 | check(!q.isEmpty && q.isFull) |
| 19 | expect(5) |
| 20 | q.send(2) // suspends (buffer full) |
| 21 | expect(9) |
| 22 | } |
| 23 | expect(2) |
| 24 | val receiver = launch(context) { |
| 25 | expect(6) |
| 26 | check(q.receive() == 1) // does not suspend -- took from buffer |
| 27 | check(!q.isEmpty && q.isFull) // waiting sender's element moved to buffer |
| 28 | expect(7) |
| 29 | check(q.receive() == 2) // does not suspend (takes from sender) |
| 30 | expect(8) |
| 31 | } |
| 32 | expect(3) |
| 33 | sender.join() |
| 34 | receiver.join() |
| 35 | check(q.isEmpty && !q.isFull) |
| 36 | finish(10) |
| 37 | } |
| 38 | |
| 39 | @Test |
| 40 | fun testStress() = runBlocking { |
| 41 | val n = 100_000 |
| 42 | val q = ArrayChannel<Int>(1) |
| 43 | val sender = launch(context) { |
| 44 | for (i in 1..n) q.send(i) |
| 45 | expect(2) |
| 46 | } |
| 47 | val receiver = launch(context) { |
| 48 | for (i in 1..n) check(q.receive() == i) |
| 49 | expect(3) |
| 50 | } |
| 51 | expect(1) |
| 52 | sender.join() |
| 53 | receiver.join() |
| 54 | finish(4) |
| 55 | } |
| 56 | |
| 57 | @Test |
| 58 | fun testClosedBufferedReceiveOrNull() = runBlocking { |
| 59 | val q = ArrayChannel<Int>(1) |
| 60 | check(q.isEmpty && !q.isFull && !q.isClosedForSend && !q.isClosedForReceive) |
| 61 | expect(1) |
| 62 | launch(context) { |
| 63 | expect(5) |
| 64 | check(!q.isEmpty && !q.isFull && q.isClosedForSend && !q.isClosedForReceive) |
| 65 | assertEquals(42, q.receiveOrNull()) |
| 66 | expect(6) |
| 67 | check(!q.isEmpty && !q.isFull && q.isClosedForSend && q.isClosedForReceive) |
| 68 | assertEquals(null, q.receiveOrNull()) |
| 69 | expect(7) |
| 70 | } |
| 71 | expect(2) |
| 72 | q.send(42) // buffers |
| 73 | expect(3) |
| 74 | q.close() // goes on |
| 75 | expect(4) |
| 76 | check(!q.isEmpty && !q.isFull && q.isClosedForSend && !q.isClosedForReceive) |
| 77 | yield() |
| 78 | check(!q.isEmpty && !q.isFull && q.isClosedForSend && q.isClosedForReceive) |
| 79 | finish(8) |
| 80 | } |
| 81 | |
| 82 | @Test |
| 83 | fun testClosedExceptions() = runBlocking { |
| 84 | val q = ArrayChannel<Int>(1) |
| 85 | expect(1) |
| 86 | launch(context) { |
| 87 | expect(4) |
| 88 | try { q.receive() } |
| 89 | catch (e: ClosedReceiveChannelException) { |
| 90 | expect(5) |
| 91 | } |
| 92 | } |
| 93 | expect(2) |
| 94 | q.close() |
| 95 | expect(3) |
| 96 | yield() |
| 97 | expect(6) |
| 98 | try { q.send(42) } |
| 99 | catch (e: ClosedSendChannelException) { |
| 100 | finish(7) |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | @Test |
| 105 | fun testOfferAndPool() = runBlocking { |
| 106 | val q = ArrayChannel<Int>(1) |
| 107 | assertTrue(q.offer(1)) |
| 108 | expect(1) |
| 109 | launch(context) { |
| 110 | expect(3) |
| 111 | assertEquals(1, q.poll()) |
| 112 | expect(4) |
| 113 | assertEquals(null, q.poll()) |
| 114 | expect(5) |
| 115 | assertEquals(2, q.receive()) // suspends |
| 116 | expect(9) |
| 117 | assertEquals(3, q.poll()) |
| 118 | expect(10) |
| 119 | assertEquals(null, q.poll()) |
| 120 | expect(11) |
| 121 | } |
| 122 | expect(2) |
| 123 | yield() |
| 124 | expect(6) |
| 125 | assertTrue(q.offer(2)) |
| 126 | expect(7) |
| 127 | assertTrue(q.offer(3)) |
| 128 | expect(8) |
| 129 | assertFalse(q.offer(4)) |
| 130 | yield() |
| 131 | finish(12) |
| 132 | } |
| 133 | } |