I'm trying to run a test but keep getting `This jo...

# coroutines

[gmaciel]

I'm trying to run a test but keep getting This job has not completed yet, any ideas what i'm doing wrong here:

@Test
fun test() = runBlockingTest {
    val mutableStateFlow = MutableStateFlow(0)
    mutableStateFlow.value = 1
    mutableStateFlow.value = 2

    val result = mutableListOf<Int>()

    mutableStateFlow.collect {
        result.add(it)
    }

    assertEquals(listOf(0, 1, 2), result)
}

[Dominaezzz]

This test looks like it'll suspend forever. Do you have a stacktrace?

[gildor]

Instead of collect you should use take(3).toList(), otherwise it will never complete as Dominic said, StateFlow never completes

[gmaciel]

Oh ok, yeah that what's happening! Thanks!

[Daniel]

why would it suspend forever @Dominaezzz

[Daniel]

I’ve faced the same issue with testing retrofit suspend calls

[Dominaezzz]

`StateFlow`s never complete. Since the value can change so long as the object exists.

[Daniel]

Okay thanks

[Daniel]

Why does calling take(3).toList() make the test pass

[Dominaezzz]

take(3) takes the first three emissions and then terminates collection.