Is there a good quality guide on how to actually setup unit testing in Kotlin/JS for a multiplatform library? I've been following SO answers & stuff but the best I could find is 2 years old and very imprecise.

Is it not working for you out-of-the-box? JS updates since 1.3.40 changed the plugin setup significantly so a lot of stuff is there by default now. Probably just need a

browser()

or

nodejs()

call in your

js{}

target block.

@russhwolf I am trying to do testing with coroutines in JS.

internal actual fun <T> runTest(block: suspend () -> T): dynamic {
    return promise { block() }
}

promise isn't being resolved. Should I add a library?

For coroutine testing in js there's a setup descrubed in this youtrack ticket: https://youtrack.jetbrains.com/issue/KT-22228

Yes I do. This is my gradle https://github.com/jeffnyauke/Mpesa-Kotlin-Multiplatform/blob/master/build.gradle.kts

the js stuff is all commented-out there

Sorry. Check it again. I've pushed the latest code. It's not working even with that dependency.

You need core-js, not core-common

val jsTest by getting {
    dependencies {
        implementation(kotlin("test-js"))

        api("io.ktor:ktor-client-mock-js:$ktorVersion")
        api("org.jetbrains.kotlinx:kotlinx-coroutines-core-js:$coroutinesVersion")
    }
}

Its core-js

I'm not sure then. Sorry.

Thanks a lot @russhwolf, I didn't realize you could do that... Glad the ecosystem is becoming so simple!

Thanks. Got it to work!

import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.promise

internal actual fun <T> runTest(block: suspend () -> T): dynamic {
    return GlobalScope.promise { block() }
}