How can I test timings of a `Flow`? I am trying to...

# coroutines

[Hakon Grotte]

How can I test timings of a Flow? I am trying to do with turbine and `TestCoroutineScheduler.currentTime`:

runTest {
  val myFlow: Flow<Int> = flow<Int> {
    (1..5).forEach {
      delay(100)
      emit(it)
    }
  }
  myFlow.test {
    repeat(5) {
      awaitItem()
      println(testScheduler.currentTime)
    }
    awaitComplete()
  }
}

The described approach does not work: For each run my test prints different/random values, e.g. "300,500,500,500,500 " etc.
I have tried using the myFlow.flowOn() operator with both test dispatchers available.

[alex.krupa]

Are you using the latest version of Turbine? Just asking because IIRC its behavior in runTest changed between versions.

[Hakon Grotte]

ohmy! I was on 0.12.0. Seems 0.12.1 fixed:
"`await`-prefixed methods no longer interfere with virtual time control from a TestScheduler (such as inside runTest)."
Thank you!