I'm not very coroutines savvy, but I'm playing with a test and added a `delay` call inside of a `sho...

# kotest

[bbaldino]

I'm not very coroutines savvy, but I'm playing with a test and added a delay call inside of a should block and found it never seems to pick back up after the delay, is there a better way to do that? (I don't necessarily need it for the test, but was 'testing' the test and noticed the behavior)

[sam]

What do you mean by pick back up

[bbaldino]

run the code after delay

[sam]

sounds like a bug

[sam]

so should("foo") { delay(1000) error("boom") } won't fail

[bbaldino]

Let me double check a simple, isolated example

[bbaldino]

Ok guess I'm full of shit.

[sam]

ok that's good 🙂

[bbaldino]

Hm, but I do see some weird behavior sometimes. I think it must be related to some other stuff I'm doing there.

[bbaldino]

I'm trying to test some code which blocks, so that might be throwing things off:

should("notify waiters").config(timeout = 5.seconds) {
            val result = async {
                shutdownService.waitForShutdown()
                true
            }
            println("before delay")
            delay(1000)
            shutdownService.beginShutdown()
            println("after!")
            result.await() shouldBe true
        }

[bbaldino]

where shutdownService is:

class ShutdownServiceImpl : ShutdownService {
    private val shutdownStarted = AtomicBoolean(false)

    private val shutdownSync = CountDownLatch(1)

    override fun beginShutdown() {
        if (shutdownStarted.compareAndSet(false, true)) {
            shutdownSync.countDown()
        }
    }

    fun waitForShutdown() {
        shutdownSync.await()
    }
}

[bbaldino]

will that async launch in the same thread? If so that may be blocking things sometimes? But it does print "before delay"

[bbaldino]

So maybe it does before delay -> delay, thread suspend, picks up the async block, then blocks indefinitely

[bbaldino]

That's probably it

[bbaldino]

Yup, ok...can ignore me. Thanks Sam.

[sam]

ok so you're happy 🙂

[LeoColman]

rubber duck