are all kotest styles affected by the IDEA slowdown?

# kotest

[christophsturm]

are all kotest styles affected by the IDEA slowdown?

[sam]

the IDE issues seem to be around excessive type parameters and/or lambdas. FunSpec might be the best one to use since it's the least "fancy"

[christophsturm]

I’m currently using minutest and my guess was that its because of all the lambdas.
(https://youtrack.jetbrains.com/issue/KT-43036) so i thought maybe its a good time to try kotest in a branch. will try with funspec

[christophsturm]

i guess another problem is that all tests are defined in one huge function.

[sam]

If you do something like

class MyTest : FunSpec() {
  init {
   test("foo") { }
  }
}

[sam]

then the number of lambdas is limited to one per test

[christophsturm]

maybe a quick fix is to use one class per context

[christophsturm]

btw is there support for junit rules? i currently use the coroutines timeout rule

[sam]

Not directly, but usually it's easy to mimic, what does the coroutines timeout one do ?

[christophsturm]

https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-debug/

class TestRuleExample {
    @get:Rule
    public val timeout = CoroutinesTimeout.seconds(1)

    private suspend fun someFunctionDeepInTheStack() {
        withContext(<http://Dispatchers.IO|Dispatchers.IO>) {
            delay(Long.MAX_VALUE) // Hang method
        }  
    }

    @Test
    fun hangingTest() = runBlocking {
        val job = launch {
            someFunctionDeepInTheStack()
        }
        job.join() // Join will hang
    }
}

After 1 second, test will fail with TestTimeoutException and all coroutines (runBlocking and launch) and their stacktraces will be dumped to the console.

[christophsturm]

it just makes sure that coroutines test don’t hang

[sam]

You can do,

test("test case with timeout").config(timeout = 150.milliseconds) {
  // coroutines here
}

[sam]

which will apply a timeout to the coroutine in the test

[sam]

You can set the value at the test level, spec level, or globally

[sam]

https://kotest.io/timeout/

[christophsturm]

does it use coroutines-debug behind the scenes?

[sam]

no

[sam]

You can turn on the debug logging via a system property

[christophsturm]

thanks!

[sam]

you're welcome 🙂