Previously for unit testing ViewModels that depend on a `SavedStateHandle` I'd just set the nav argu...

# compose

[Jorge Domínguez]

Previously for unit testing ViewModels that depend on a SavedStateHandle I'd just set the nav argument key and the value I need before instantiating the ViewModel:

@Before
fun setup() {
    savedStateHandle[NAV_ARGUMENT_KEY] = someValue
    viewModel = ViewModel(savedStateHandle)
}

Is there a way I can do that with the new type-safe APIs? In my ViewModel I'm using toRoute() to get the serializable that represents the nav destination, but I can't figure out how to do the inverse and somehow "save" the serializable into the SavedStateHandle.

[Ian Lake]

This exact thing was added in beta01, as per the release notes: https://developer.android.com/jetpack/androidx/releases/navigation#2.8.0-beta01

[Ian Lake]

So add the navigation-testing artifact and use the SavedStateHandle(yourSerializableInstance)

[Ian Lake]

Note the known issue where this only works in instrumentation or Robolectric tests at the moment: https://issuetracker.google.com/issues/340966212

[Jorge Domínguez]

got it, that’s unfortunate but for now it’ll do, thanks a lot