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"Trying to call 'getOrThrow' on a failed channel result: Failed" when testing moleculeFlow with Turbine

See original GitHub issue

Presenter:

@Composable fun PortfolioPresenter(): PortfolioModel {
  var portfolioModel by remember { mutableStateOf<PortfolioModel>(PortfolioModel.Loading) }
  LaunchedEffect("get-portfolio") {
    portfolioModel = PortfolioModel.Error("Boom!")
  }
  return portfolioModel
}

Test:

class PortfolioPresenterTest {
  @Test fun `loads portfolio`() = runBlocking {
    makePresenter().test {
      assertThat(awaitItem()).isEqualTo(PortfolioModel.Loading)
      assertThat(awaitItem()).isEqualTo(PortfolioModel.Error("Boom!"))
    }
  }

  private fun makePresenter(): Flow<PortfolioModel> {
    return moleculeFlow(clock = Immediate) {
      PortfolioPresenter()
    }
  }
}

The test fails with app.cash.turbine.AssertionError: Expected item but found Error(IllegalStateException), full stack trace below:

Stacktrace 

Expected item but found Error(IllegalStateException)
app.cash.turbine.AssertionError: Expected item but found Error(IllegalStateException)
	at app//app.cash.turbine.ChannelBasedFlowTurbine.unexpectedEvent(FlowTurbine.kt:353)
	at app//app.cash.turbine.ChannelBasedFlowTurbine.awaitItem(FlowTurbine.kt:301)
	at app//dev.egorand.moleculegetorthrowbug.PortfolioPresenterTest$loads portfolio$1$1.invokeSuspend(PortfolioPresenterTest.kt:14)
	at app//dev.egorand.moleculegetorthrowbug.PortfolioPresenterTest$loads portfolio$1$1.invoke(PortfolioPresenterTest.kt)
	at app//dev.egorand.moleculegetorthrowbug.PortfolioPresenterTest$loads portfolio$1$1.invoke(PortfolioPresenterTest.kt)
	at app//app.cash.turbine.FlowTurbineKt$test$4.invokeSuspend(FlowTurbine.kt:103)
	at app//app.cash.turbine.FlowTurbineKt$test$4.invoke(FlowTurbine.kt)
	at app//app.cash.turbine.FlowTurbineKt$test$4.invoke(FlowTurbine.kt)
	at app//kotlinx.coroutines.intrinsics.UndispatchedKt.startUndispatchedOrReturn(Undispatched.kt:89)
	at app//kotlinx.coroutines.CoroutineScopeKt.coroutineScope(CoroutineScope.kt:264)
	at app//app.cash.turbine.FlowTurbineKt.test(FlowTurbine.kt:101)
	at app//dev.egorand.moleculegetorthrowbug.PortfolioPresenterTest$loads portfolio$1.invokeSuspend(PortfolioPresenterTest.kt:13)
	at app//kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at app//kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at app//kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:284)
	at app//kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:85)
	at app//kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:59)
	at app//kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
	at app//kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:38)
	at app//kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
	at app//dev.egorand.moleculegetorthrowbug.PortfolioPresenterTest.loads portfolio(PortfolioPresenterTest.kt:12)
	at java.base@11.0.16/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base@11.0.16/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base@11.0.16/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base@11.0.16/java.lang.reflect.Method.invoke(Method.java:566)
	at app//org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
	at app//org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at app//org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
	at app//org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at app//org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at app//org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
	at app//org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
	at app//org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
	at app//org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
	at app//org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
	at app//org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
	at app//org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
	at app//org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
	at app//org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
	at app//org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at app//org.junit.runners.ParentRunner.run(ParentRunner.java:413)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:110)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:38)
	at org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:62)
	at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
	at java.base@11.0.16/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base@11.0.16/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base@11.0.16/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base@11.0.16/java.lang.reflect.Method.invoke(Method.java:566)
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
	at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
	at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
	at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker$2.run(TestWorker.java:176)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName(TestWorker.java:129)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:100)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:60)
	at org.gradle.process.internal.worker.child.ActionExecutionWorker.execute(ActionExecutionWorker.java:56)
	at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:133)
	at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:71)
	at app//worker.org.gradle.process.internal.worker.GradleWorkerMain.run(GradleWorkerMain.java:69)
	at app//worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:74)
Caused by: java.lang.IllegalStateException: Trying to call 'getOrThrow' on a failed channel result: Failed
	at kotlinx.coroutines.channels.ChannelResult.getOrThrow-impl(Channel.kt:443)
	at app.cash.molecule.MoleculeKt$immediateClockFlow$1$1$1$1.invoke(molecule.kt:68)
	at app.cash.molecule.MoleculeKt$immediateClockFlow$1$1$1$1.invoke(molecule.kt:64)
	at app.cash.molecule.MoleculeKt$launchMolecule$2$3.invoke(molecule.kt:164)
	at app.cash.molecule.MoleculeKt$launchMolecule$2$3.invoke(molecule.kt:163)
	at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:107)
	at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:34)
	at androidx.compose.runtime.RecomposeScopeImpl.compose(RecomposeScopeImpl.kt:140)
	at androidx.compose.runtime.ComposerImpl.recomposeToGroupEnd(Composer.kt:2158)
	at androidx.compose.runtime.ComposerImpl.skipCurrentGroup(Composer.kt:2404)
	at androidx.compose.runtime.ComposerImpl$doCompose$2$5.invoke(Composer.kt:2585)
	at androidx.compose.runtime.ComposerImpl$doCompose$2$5.invoke(Composer.kt:2571)
	at androidx.compose.runtime.SnapshotStateKt__DerivedStateKt.observeDerivedStateRecalculations(DerivedState.kt:247)
	at androidx.compose.runtime.SnapshotStateKt.observeDerivedStateRecalculations(Unknown Source)
	at androidx.compose.runtime.ComposerImpl.doCompose(Composer.kt:2571)
	at androidx.compose.runtime.ComposerImpl.recompose$runtime_release(Composer.kt:2547)
	at androidx.compose.runtime.CompositionImpl.recompose(Composition.kt:620)
	at androidx.compose.runtime.Recomposer.performRecompose(Recomposer.kt:786)
	at androidx.compose.runtime.Recomposer.access$performRecompose(Recomposer.kt:105)
	at androidx.compose.runtime.Recomposer$runRecomposeAndApplyChanges$2$2.invoke(Recomposer.kt:456)
	at androidx.compose.runtime.Recomposer$runRecomposeAndApplyChanges$2$2.invoke(Recomposer.kt:425)
	at androidx.compose.runtime.BroadcastFrameClock$FrameAwaiter.resume(BroadcastFrameClock.kt:42)
	at androidx.compose.runtime.BroadcastFrameClock.sendFrame(BroadcastFrameClock.kt:71)
	at app.cash.molecule.GatedFrameClock.sendFrame(GatedFrameClock.kt:50)
	at app.cash.molecule.GatedFrameClock.access$sendFrame(GatedFrameClock.kt:31)
	at app.cash.molecule.GatedFrameClock$1.invokeSuspend(GatedFrameClock.kt:36)
	(Coroutine boundary)
	at androidx.compose.runtime.Recomposer$runRecomposeAndApplyChanges$2.invokeSuspend(Recomposer.kt:425)
	at androidx.compose.runtime.Recomposer$recompositionRunner$2$2.invokeSuspend(Recomposer.kt:682)
	at androidx.compose.runtime.Recomposer$recompositionRunner$2.invokeSuspend(Recomposer.kt:681)
	at app.cash.molecule.MoleculeKt$launchMolecule$2$1.invokeSuspend(molecule.kt:145)
	at app.cash.molecule.MoleculeKt$immediateClockFlow$1.invokeSuspend(molecule.kt:59)
	at kotlinx.coroutines.flow.AbstractFlow.collect(Flow.kt:230)
	at app.cash.turbine.FlowTurbineKt$collectTurbineIn$collectJob$1.invokeSuspend(FlowTurbine.kt:146)
Caused by: java.lang.IllegalStateException: Trying to call 'getOrThrow' on a failed channel result: Failed
	at kotlinx.coroutines.channels.ChannelResult.getOrThrow-impl(Channel.kt:443)
	at app.cash.molecule.MoleculeKt$immediateClockFlow$1$1$1$1.invoke(molecule.kt:68)
	at app.cash.molecule.MoleculeKt$immediateClockFlow$1$1$1$1.invoke(molecule.kt:64)
	at app.cash.molecule.MoleculeKt$launchMolecule$2$3.invoke(molecule.kt:164)
	at app.cash.molecule.MoleculeKt$launchMolecule$2$3.invoke(molecule.kt:163)
	at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:107)
	at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:34)
	at androidx.compose.runtime.RecomposeScopeImpl.compose(RecomposeScopeImpl.kt:140)
	at androidx.compose.runtime.ComposerImpl.recomposeToGroupEnd(Composer.kt:2158)
	at androidx.compose.runtime.ComposerImpl.skipCurrentGroup(Composer.kt:2404)
	at androidx.compose.runtime.ComposerImpl$doCompose$2$5.invoke(Composer.kt:2585)
	at androidx.compose.runtime.ComposerImpl$doCompose$2$5.invoke(Composer.kt:2571)
	at androidx.compose.runtime.SnapshotStateKt__DerivedStateKt.observeDerivedStateRecalculations(DerivedState.kt:247)
	at androidx.compose.runtime.SnapshotStateKt.observeDerivedStateRecalculations(Unknown Source)
	at androidx.compose.runtime.ComposerImpl.doCompose(Composer.kt:2571)
	at androidx.compose.runtime.ComposerImpl.recompose$runtime_release(Composer.kt:2547)
	at androidx.compose.runtime.CompositionImpl.recompose(Composition.kt:620)
	at androidx.compose.runtime.Recomposer.performRecompose(Recomposer.kt:786)
	at androidx.compose.runtime.Recomposer.access$performRecompose(Recomposer.kt:105)
	at androidx.compose.runtime.Recomposer$runRecomposeAndApplyChanges$2$2.invoke(Recomposer.kt:456)
	at androidx.compose.runtime.Recomposer$runRecomposeAndApplyChanges$2$2.invoke(Recomposer.kt:425)
	at androidx.compose.runtime.BroadcastFrameClock$FrameAwaiter.resume(BroadcastFrameClock.kt:42)
	at androidx.compose.runtime.BroadcastFrameClock.sendFrame(BroadcastFrameClock.kt:71)
	at app.cash.molecule.GatedFrameClock.sendFrame(GatedFrameClock.kt:50)
	at app.cash.molecule.GatedFrameClock.access$sendFrame(GatedFrameClock.kt:31)
	at app.cash.molecule.GatedFrameClock$1.invokeSuspend(GatedFrameClock.kt:36)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at kotlinx.coroutines.EventLoop.processUnconfinedEvent(EventLoop.common.kt:69)
	at kotlinx.coroutines.DispatchedTaskKt.resumeUnconfined(DispatchedTask.kt:245)
	at kotlinx.coroutines.DispatchedTaskKt.dispatch(DispatchedTask.kt:161)
	at kotlinx.coroutines.CancellableContinuationImpl.dispatchResume(CancellableContinuationImpl.kt:397)
	at kotlinx.coroutines.CancellableContinuationImpl.resumeImpl(CancellableContinuationImpl.kt:431)
	at kotlinx.coroutines.CancellableContinuationImpl.resumeImpl$default(CancellableContinuationImpl.kt:420)
	at kotlinx.coroutines.CancellableContinuationImpl.resumeWith(CancellableContinuationImpl.kt:328)
	at androidx.compose.runtime.Recomposer.invalidate$runtime_release(Recomposer.kt:895)
	at androidx.compose.runtime.CompositionImpl.invalidate(Composition.kt:700)
	at androidx.compose.runtime.RecomposeScopeImpl.invalidateForResult(RecomposeScopeImpl.kt:148)
	at androidx.compose.runtime.CompositionImpl.addPendingInvalidationsLocked$invalidate(Composition.kt:552)
	at androidx.compose.runtime.CompositionImpl.addPendingInvalidationsLocked(Composition.kt:567)
	at androidx.compose.runtime.CompositionImpl.drainPendingModificationsLocked(Composition.kt:459)
	at androidx.compose.runtime.CompositionImpl.applyChanges(Composition.kt:658)
	at androidx.compose.runtime.Recomposer.composeInitial$runtime_release(Recomposer.kt:763)
	at androidx.compose.runtime.CompositionImpl.setContent(Composition.kt:433)
	at app.cash.molecule.MoleculeKt.launchMolecule(molecule.kt:163)
	at app.cash.molecule.MoleculeKt$immediateClockFlow$1$1$1.invokeSuspend(molecule.kt:64)
	at app.cash.molecule.MoleculeKt$immediateClockFlow$1$1$1.invoke(molecule.kt)
	at app.cash.molecule.MoleculeKt$immediateClockFlow$1$1$1.invoke(molecule.kt)
	at kotlinx.coroutines.intrinsics.UndispatchedKt.startCoroutineUndispatched(Undispatched.kt:55)
	at kotlinx.coroutines.CoroutineStart.invoke(CoroutineStart.kt:112)
	at kotlinx.coroutines.AbstractCoroutine.start(AbstractCoroutine.kt:126)
	at kotlinx.coroutines.BuildersKt__Builders_commonKt.launch(Builders.common.kt:56)
	at kotlinx.coroutines.BuildersKt.launch(Unknown Source)
	at app.cash.molecule.MoleculeKt$immediateClockFlow$1$1.invokeSuspend(molecule.kt:63)
	at app.cash.molecule.MoleculeKt$immediateClockFlow$1$1.invoke(molecule.kt)
	at app.cash.molecule.MoleculeKt$immediateClockFlow$1$1.invoke(molecule.kt)
	at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndispatchedOrReturn(Undispatched.kt:89)
	at kotlinx.coroutines.CoroutineScopeKt.coroutineScope(CoroutineScope.kt:264)
	at app.cash.molecule.MoleculeKt$immediateClockFlow$1.invokeSuspend(molecule.kt:59)
	at app.cash.molecule.MoleculeKt$immediateClockFlow$1.invoke(molecule.kt)
	at app.cash.molecule.MoleculeKt$immediateClockFlow$1.invoke(molecule.kt)
	at kotlinx.coroutines.flow.SafeFlow.collectSafely(Builders.kt:61)
	at kotlinx.coroutines.flow.AbstractFlow.collect(Flow.kt:230)
	at app.cash.turbine.FlowTurbineKt$collectTurbineIn$collectJob$1.invokeSuspend(FlowTurbine.kt:146)
	at app.cash.turbine.FlowTurbineKt$collectTurbineIn$collectJob$1.invoke(FlowTurbine.kt)
	at app.cash.turbine.FlowTurbineKt$collectTurbineIn$collectJob$1.invoke(FlowTurbine.kt)
	at kotlinx.coroutines.intrinsics.UndispatchedKt.startCoroutineUndispatched(Undispatched.kt:55)
	at kotlinx.coroutines.CoroutineStart.invoke(CoroutineStart.kt:112)
	at kotlinx.coroutines.AbstractCoroutine.start(AbstractCoroutine.kt:126)
	at kotlinx.coroutines.BuildersKt__Builders_commonKt.launch(Builders.common.kt:56)
	at kotlinx.coroutines.BuildersKt.launch(Unknown Source)
	at app.cash.turbine.FlowTurbineKt.collectTurbineIn(FlowTurbine.kt:143)
	at app.cash.turbine.FlowTurbineKt.access$collectTurbineIn(FlowTurbine.kt:1)
	at app.cash.turbine.FlowTurbineKt$test$4.invokeSuspend(FlowTurbine.kt:102)
	at app.cash.turbine.FlowTurbineKt$test$4.invoke(FlowTurbine.kt)
	at app.cash.turbine.FlowTurbineKt$test$4.invoke(FlowTurbine.kt)
	at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndispatchedOrReturn(Undispatched.kt:89)
	at kotlinx.coroutines.CoroutineScopeKt.coroutineScope(CoroutineScope.kt:264)
	at app.cash.turbine.FlowTurbineKt.test(FlowTurbine.kt:101)
	at dev.egorand.moleculegetorthrowbug.PortfolioPresenterTest$loads portfolio$1.invokeSuspend(PortfolioPresenterTest.kt:13)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:284)
	at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:85)
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:59)
	at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:38)
	at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
	at dev.egorand.moleculegetorthrowbug.PortfolioPresenterTest.loads portfolio(PortfolioPresenterTest.kt:12)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:110)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:38)
	at org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:62)
	at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
	at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
	at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
	at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker$2.run(TestWorker.java:176)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName(TestWorker.java:129)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:100)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:60)
	at org.gradle.process.internal.worker.child.ActionExecutionWorker.execute(ActionExecutionWorker.java:56)
	at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:133)
	at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:71)
	at worker.org.gradle.process.internal.worker.GradleWorkerMain.run(GradleWorkerMain.java:69)
	at worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:74)

Repro project: https://github.com/Egorand/molecule-get-or-throw-bug

To reproduce the issue, run ./gradlew app:testDebugUnitTest.

Issue Analytics

  • State:closed
  • Created a year ago
  • Comments:6 (4 by maintainers)

github_iconTop GitHub Comments

1reaction
jingibuscommented, Aug 10, 2022

The fix is, instead of this:

  private val clock = BroadcastFrameClock {
    frameSends.trySend(Unit).getOrThrow()
  }

…this:

  private val clock = BroadcastFrameClock {
    if (isRunning) frameSends.trySend(Unit).getOrThrow()
  }

🤦

0reactions
jingibuscommented, Aug 10, 2022

The mystery deepens: repros for Turbine 0.8, but not Turbine 0.9 🤔

Read more comments on GitHub >

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Turbine is a small testing library for kotlinx.coroutines Flow
A small testing library for kotlinx.coroutines Flow - GitHub ... If await* is called and nothing happens, Turbine will timeout and fail instead...
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mockk every {}.throws() Exception fails test - Stack Overflow
It will fail the test, if no exception is thrown. ... The unit test to verify the result when the following method is...
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getOrThrow - Kotlin Programming Language
Returns the encapsulated value if this instance represents success or throws the encapsulated Throwable exception if it is failure.
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Cashapp Molecule Issues - IssueHint
"Trying to call 'getOrThrow' on a failed channel result: Failed" when testing moleculeFlow with Turbine, closed, 6, 2022-07-31, 2022-11-28.
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Build a StateFlow stream using Jetpack Compose
"Trying to call 'getOrThrow' on a failed channel result: Failed" when testing moleculeFlow with Turbine. Presenter:
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