Why this tests sometimes is success and sometimes ...

# kotlintest

[Sergio Crespo Toubes]

Why this tests sometimes is success and sometimes failed?

fun loadData = MainScope().launch {
    view.showProgressDialog()
    // load data
}

Given(""){
    When(""){
        runBlocking {
            withContext(Dispatchers.Main) {
                presenter.loadData()
            }
        }

        Then("show progress dialog") {
            verify(exactly = 1) {
                view.showProgressDialog() 
            }
        }
    }
}

I am loading coroutines with this way

val mainThreadSurrogate = newSingleThreadContext("Main thread")
override fun isolationMode(): IsolationMode = IsolationMode.InstancePerLeaf

override fun beforeSpec(spec: Spec) {
    super.beforeSpec(spec)
    Dispatchers.setMain(mainThreadSurrogate)
}

override fun afterSpec(spec: Spec) {
    super.afterSpec(spec)
    mainThreadSurrogate.close()
}

[wasyl]

I recall having problems with blocks with the same name, do you also run this with Given("") and When("")? What if you tried putting two different, non-empty strings there?

[Sergio Crespo Toubes]

that two have different string names

[Sergio Crespo Toubes]

it was an example

[LeoColman]

I believe the contexts are suspended. Why do you need a RunBlocking inside the test?

[Sergio Crespo Toubes]

because i show it in examples of coroutines testing... 😅

[Sergio Crespo Toubes]

have i remove runBlocking then?

[LeoColman]

I think you can, yes.
Our Specs have suspend added to them, so they run in a coroutine context already

[Sergio Crespo Toubes]

aaaaaaaah

[Sergio Crespo Toubes]

dunno i could do that

[LeoColman]

I don't know if that's what causing your issues tho

[Sergio Crespo Toubes]

you are talking about these suspend When(""){} ?

[LeoColman]

You don't need RunBlocking inside your When

[Sergio Crespo Toubes]

ok i will try then

[Sergio Crespo Toubes]

@LeoColman and withContext(Dispatchers.Main)? it must be removed?

[LeoColman]

That depends on your use case. I'm not sure why you're using that dispatcher

[LeoColman]

I don't think you would need it

[sam]

I’d imagine your issue is that there’s some non-deterministic stuff going on

[sam]

coroutines finishing first / second