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kotlinlang

In the ScrollBarTest class, the often cited example of Compose Desktop testing that is not Android code, there are the following lines:
    `// don't inline, surface controls canvas life time`
    `private val surface = Surface.makeRasterN32Premul(100, 100)`
    `private val canvas = surface.canvas`
What's this code doing in terms of facilitating JVM Compose testing?

Where do you see that code at <https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:compose/foundation/foundation/src/desktopTest/kotlin/androidx/compose/foundation/ScrollbarTest.kt|https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:compose/[…]sktopTest/kotlin/androidx/compose/foundation/ScrollbarTest.kt> ?

Fascinating. Your link does not show the code. My link: <https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:compose/foundation/foundation/src/desktopTest/kotlin/androidx/compose/foundation/ScrollbarTest.kt;drc=68ebfa11f81d57ba35ccb073b97d06c2399d8496|https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:compose/[…]ScrollbarTest.kt;drc=68ebfa11f81d57ba35ccb073b97d06c2399d8496> does show the code at lines 71-73.
I'm guessing your link is more recent that the one I was using which, if memory serves, I got from the original bug report post. I like your link better because it means the answer to my question is: nothing at all.

<@UHED82QLX> Do you know what the purpose of TestBox is? Looks to me like it is infrastructure to support testing gesture code, a noun and not a verb.