Is there a way to collect the androix.compose.runt...

# compose

[Pablichjenkov]

Is there a way to collect the androix.compose.runtime.State<T> outside of a Composable?
Use case: Unit Tests
My ViewModel exposes State<T>, I want to consume it directly from the composable no need for a flow.
But now in the test class, I would like to collect the updates to a list of the value history, to make sure the right order.
Is it possible outside the composable scope?

[jw]

https://developer.android.com/reference/kotlin/androidx/compose/runtime/package-summary#snapshotFlow(kotlin.Function0)

[Pablichjenkov]

Ahhh it keeps biting man, yeah this is it.
Quick question, is compose State<T> or the snapshotFlow implementation conflated?
It seems that I am losing updates that are emitted right after the other.

[Chris Fillmore]

State is always conflated, yes

[Chris Fillmore]

If you need events, do not use state or state flows

[Pablichjenkov]

Yeah, just read it in the documentation page linked above, sorry I forgot to update. Many thanks

[Pablichjenkov]

|If you need events, do not use state or state flows
I do need State, and in production I don't care if they gets conflated but for testing purposes I want to track the updates history to make sure my logic meets the requirements.

[Chris Fillmore]

You will need to check in between each state update individually

[Pablichjenkov]

Yeup, that's what I am figuring out. Thinking of having 2 instances of the StateUpdater/Reducer function. One for prod and one for testing that adds a delay. Gotta move the function to an injectable interface. It is private to the VM right now

[Pablichjenkov]

Perhaps instead of a delay I better enque them in a channel

[Chris Fillmore]

I would caution you against doing that. State is conflated intentionally, and writing a test that artificially avoids conflation indicates to me that you are testing the wrong behaviour.

[Pablichjenkov]

🤔 thanks for the advice, let me wonder about a different approach. Perhaps I need to fragment/structure my state representation in a different manner