Hi team, When I upgraded to Compose Multiplatform ...

# compose-web

[Khangpv202]

Hi team, When I upgraded to Compose Multiplatform 1.9.0 (from 1.8.2), it seems that the testing has stopped working. Specifically, the runComposeUiTest calls are no longer running. Has anyone else encountered this issue?

[Michael Paus]

Have you tried the most recent stable version 1.9.1 already? It does not make much sense do discuss potential regressions based on already outdated versions because they may be fixed already.

[Khangpv202]

Thanks for your reply.
Compose 1.9.1 required an upgrade of kotlinx-datetime from 0.6.2 to 0.7.1. I noticed that in version 0.7.1, the toLocalDateTime() function has been removed.

[Michael Paus]

Do you mean that?

import kotlinx.datetime.LocalDateTime
import kotlinx.datetime.TimeZone
import kotlinx.datetime.toLocalDateTime
import kotlin.time.Clock
import kotlin.time.ExperimentalTime
import kotlin.time.Instant

@OptIn(ExperimentalTime::class)
class TestTime {

    val instant: Instant = Clock.System.now()

    val ldt: LocalDateTime = instant.toLocalDateTime(TimeZone.currentSystemDefault())

}

It hasn't been removed. You just have to specify the timezone for the conversion.

[Khangpv202]

thank u so much Paus, 🎉

[Khangpv202]

Hi @Michael Paus,
Because Compose 1.9.1 + Kotlin 2.2.20 still isn't working in my project, I downloaded a new project from the Kotlin Multiplatform Wizard, and it isn't working either (you can see the test result: only one log)

[Michael Paus]

I use Compose 1.9.1 + Kotlin 2.2.21 in all my projects without problem.

[Oleksandr Karpovich [JB]]

runComposeUiTest result should be returned from the test function due to https://kotlinlang.org/api/kotlinx.coroutines/kotlinx-coroutines-test/kotlinx.coroutines.test/run-test.html

On JS, this function creates a Promise that executes the test body with the delay-skipping behavior.

so the test must look like:

@Test
fun testAThing() = runComposeUiTest { ... }

[Khangpv202]

U are correct bro. I did the same and it worked :)

[Oliver.O]

For folks using testballoon TestBalloon: The restriction @Oleksandr Karpovich [JB] mentioned does not apply there. In TestBalloon, runComposeUiTest can be used anywhere as explained in the how-to. This is even true on JS platforms, where TestBalloon takes care of the Promise required by the low-level JS infra.