Anyone else notice that `waitUntil` agressively blocks the m kotlinlang #multiplatform

Anyone else notice, that `waitUntil` agressively b...

# multiplatform

c

chrisjenx

02/21/2025, 4:12 PM

Anyone else notice, that

waitUntil

agressively blocks the main thread causing background tasks on the same scope to never complete?

Copy code

// Works
        while (!downloadCalled) {
            Thread.sleep(100)
        }
        downloadCalled.shouldBeTrue()
        // Will block here for ever as it locks the thread so the thing we are waiting for will
        //  never run
        // waitUntil(timeoutMillis = 5000) { downloadCalled }

chrisjenx

02/21/2025, 4:13 PM

It will not even timeout, feels very broken? This is desktopTest, might be fine on other srcs..?

j

jw

02/21/2025, 5:03 PM

Is this some #CJLTWPH7S function? What is

waitUntil

?

c

chrisjenx

02/21/2025, 5:03 PM

yeah

ComposeUiTest

chrisjenx

02/21/2025, 5:04 PM

Seems to work on the emulators, so guessing something when it got ported to desktop src for KMP

j

jw

02/21/2025, 5:04 PM

Ask in #C01D6HTPATV then I guess?

👍 1

jw

02/21/2025, 5:08 PM

It seems to just constantly blockingly run a frame on the main thread

jw

02/21/2025, 5:09 PM

https://github.com/JetBrains/compose-multiplatform-core/blob/8c335c0b52a5cd1926695ea2c16ddeb627cde414/compose/ui/ui-test/src/skikoMain/kotlin/androidx/compose/ui/test/ComposeUiTest.skiko.kt#L256-L258

jw

02/21/2025, 5:09 PM

They need a

Thread.sleep

after this call https://github.com/JetBrains/compose-multiplatform-core/blob/8c335c0b52a5cd1926695ea2c16ddeb627cde414/compose/ui/ui-test/src/skikoMain/kotlin/androidx/compose/ui/test/ComposeUiTest.skiko.kt#L321

jw

02/21/2025, 5:10 PM

Android sleeps 10ms https://github.com/JetBrains/compose-multiplatform-core/blob/8c335c0b52a5cd1926695ea2c16ddeb627cde414/compose/ui/ui-test/src/androidMain/kotlin/androidx/compose/ui/test/ComposeUiTest.android.kt#L511-L512

c

chrisjenx

02/21/2025, 5:10 PM

OK cool, glad I'm not crazy then!

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