Hi, im trying to write some tests around some code that delays before taking an action. however, delays are skipped when using

runTest

and its making testing the timeout impossible. am i missing something? im trying to use

advanceTimeBy

to maneuver around this delay for tests but it seems useless as the delays are just skipped

What is the timeout for? How does the system behave differently depending on whether the timeout finished or not?

a lamda is run if the timeout completes

How I would do it:

@Test
fun lambdaIsNotCalledIfTimeoutDidntEnd() = runTest {
    var called = false
    flow {
        delay(100)
        emit(Unit)
    }.ifDelayed(1000) {
        called = true
    }.collect()
    assertFalse(called)
}

@Test
fun lambdaIsCalledIfTimeoutEnds() = runTest {
    var called = false
    flow {
        delay(5000)
        emit(Unit)
    }.ifDelayed(1000) {
        called = true
    }.collect()
    assertTrue(called)
}

ooh brilliant

It's not useless, it's just that what you want to test is whether the lambda is called or not. You don't really care about the control of time at all