Is there any way to define `@BeforeClass` / `@AfterClass` in multiplatform common tests? AFAICT thes...

# multiplatform

[Joffrey]

Is there any way to define @BeforeClass / @AfterClass in multiplatform common tests? AFAICT these annotations are JVM-only at the moment 😞
I could add cleanup after each test, but that's a bit overkill, and may not work for every use case.

[ephemient]

there's kotlin.test.BeforeClass/kotlin.test.AfterClass on native, but right, nothing for JS/common

[Big Chungus]

Here's how I've hacked it https://github.com/mpetuska/monko/blob/master/test/src/commonMain/kotlin/BlockingTest.kt

[Big Chungus]

And usage https://github.com/mpetuska/monko/blob/master/lib/monko-core/src/commonTest/kotlin/MonkoClientTest.kt

[Joffrey]

@ephemient Ok, thanks, that's what I feared... 😭

[Joffrey]

@Big Chungus this is @Before /`@After` behaviour, where setup/cleanup is executed for each test. I'm looking for a single setup/cleanup for all tests.

[Big Chungus]

@Before Old can easily be added to that class. @After might be more tricky

[Big Chungus]

Oops, accidentally tagged someone

[Big Chungus]

But in most cases beforeEach and afterEach are good alternatives to before and after if you don't mind losing a bit of performance

[Joffrey]

@BeforeTest and @AfterTest are already supported out of the box on all platforms, though:
https://kotlinlang.org/api/latest/kotlin.test/kotlin.test/-before-test/
https://kotlinlang.org/api/latest/kotlin.test/kotlin.test/-after-test/

So I already have this option without extra hack (which is what I'm doing now), but I wanted to have class-level hooks to avoid unnecessary work (I use these hooks to generate reports).

[Big Chungus]

Hmm, can't recall why I've made my own. But I was aware of those already.

[ephemient]

it looks like QUnit, Jasmine, Mocha, Jest, and Karma all support some form of beforeAll()/afterAll() (called before()/after() in some), so I feel like Kotlin's test adapter should be able to translate somehow… I don't know how to make that happen, though.

[Joffrey]

Yeah I have the same feeling. Since it's explicitly stated in the BeforeClass docs that it's not supported in common code, I don't think the Kotlin team just "forgot". There is likely some blocker they must have faced but I'd be interested in knowing what exactly.

[Joffrey]

I haven't found any open issue in YouTrack regarding this, btw. Will probably open one for tracking

[Joffrey]

https://youtrack.jetbrains.com/issue/KT-49141