| /* |
| * Copyright 2016-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license. |
| */ |
| |
| |
| package kotlinx.coroutines.flow |
| |
| import kotlinx.coroutines.* |
| import kotlinx.coroutines.channels.* |
| import kotlin.test.* |
| |
| abstract class FlatMapMergeBaseTest : FlatMapBaseTest() { |
| @Test |
| fun testFailureCancellation() = runTest { |
| val flow = flow { |
| expect(2) |
| emit(1) |
| expect(3) |
| emit(2) |
| expect(4) |
| }.flatMap { |
| if (it == 1) flow { |
| hang { expect(6) } |
| } else flow<Int> { |
| expect(5) |
| throw TestException() |
| } |
| } |
| |
| expect(1) |
| assertFailsWith<TestException> { flow.singleOrNull() } |
| finish(7) |
| } |
| |
| @Test |
| fun testConcurrentFailure() = runTest { |
| val latch = Channel<Unit>() |
| val flow = flow { |
| expect(2) |
| emit(1) |
| expect(3) |
| emit(2) |
| }.flatMap { |
| if (it == 1) flow<Int> { |
| expect(5) |
| latch.send(Unit) |
| hang { |
| expect(7) |
| throw TestException2() |
| |
| } |
| } else { |
| expect(4) |
| latch.receive() |
| expect(6) |
| throw TestException() |
| } |
| } |
| |
| expect(1) |
| assertFailsWith<TestException>(flow) |
| finish(8) |
| } |
| |
| @Test |
| fun testFailureInMapOperationCancellation() = runTest { |
| val latch = Channel<Unit>() |
| val flow = flow { |
| expect(2) |
| emit(1) |
| expect(3) |
| emit(2) |
| expectUnreached() |
| }.flatMap { |
| if (it == 1) flow { |
| expect(5) |
| latch.send(Unit) |
| hang { expect(7) } |
| } else { |
| expect(4) |
| latch.receive() |
| expect(6) |
| throw TestException() |
| } |
| } |
| |
| expect(1) |
| assertFailsWith<TestException> { flow.count() } |
| finish(8) |
| } |
| |
| @Test |
| abstract fun testFlatMapConcurrency(): TestResult |
| } |