I want to test that my business logic times out

[swankjesse]

I want to write a test that does something like this:

  @Test
  fun testingBusinessLogicThatDoesTimeouts() = runTest {
    val turbine = Turbine<String>()
    assertFailsWith<TimeoutCancellationException> {
      withTimeout(1.seconds) {
        turbine.awaitItem()
      }
    }
  }

Unfortunately it fails like so:

Expected an exception of class kotlinx.coroutines.TimeoutCancellationException to be thrown, but was app.cash.turbine.TurbineAssertionError: No value produced in 3s

[JakeWharton]

We also tested sending an exception to the turbine which does not work. It's wrapped in the same exception.