Anyone else notice, that `waitUntil` agressively blocks the main thread causing background tasks on ...

# multiplatform

[chrisjenx]

Anyone else notice, that waitUntil agressively blocks the main thread causing background tasks on the same scope to never complete?

// 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]

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

[jw]

Is this some #CJLTWPH7S function? What is waitUntil?

[chrisjenx]

yeah ComposeUiTest

[chrisjenx]

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

[jw]

Ask in #C01D6HTPATV then I guess?

[jw]

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

[jw]

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]

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]

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

[chrisjenx]

OK cool, glad I'm not crazy then!