Does not cooperate well with runTest

When using turbine to test flows, delays are not skipped which causes tests to run with full delays. I would expect turbine to skip the delays.

Tested with:

• Turbine 0.8.0
• Coroutines 1.6.3

Reproducer:

  @Test
  fun turbineDelay() {
    val delayingFlow = flow {
      delay(2.seconds)
      emit(Unit)
    }
    measureTime {
      runTest {
        delayingFlow.test {
          awaitItem()
          awaitComplete()
        }
      }
    }.also { println("turbine test took $it") }
    measureTime {
      runTest {
        delayingFlow.collect()
      }
    }.also { println("regular runTest took $it") }
  }

This prints on my machine:

turbine test took 2.061758791s
regular runTest took 2.227208ms

[PaulWoitaschek]

Yes, thanks!

turbine test took 67.152292ms
regular runTest took 569.333us

[JakeWharton]

It releases when it releases.