Test scrolling of LazyList

[veyndan]

Integrates WindowedLazyList in the test, so any change to WindowedLazyList#updateViewport will be tested here.

[JakeWharton]

Isn't this supposed to be generated for the testing code automatically?

[veyndan]

I commented on this but I forgot to press submit 🤦 This is what I originally wrote about it:

This is a copy-paste of the generated TestSchemaTester, with the only change being that factories is now a parameter, thus can be changed. Would such an API change make sense within the generated code?

For reference, this is what the generated one looks like:

@OptIn(RedwoodCodegenApi::class)
public suspend fun <R>
    TestSchemaTester(body: suspend TestRedwoodComposition<List<WidgetValue>>.() -> R): R =
    coroutineScope {
  val factories = TestSchemaWidgetFactories(
    TestSchema = TestSchemaTestingWidgetFactory(),
    RedwoodLayout = RedwoodLayoutTestingWidgetFactory(),
    RedwoodLazyLayout = RedwoodLazyLayoutTestingWidgetFactory(),
  )
  val container = MutableListChildren<WidgetValue>()
  val tester = TestRedwoodComposition(this, factories, container,
      MutableStateFlow(UiConfiguration())) {
    container.map { it.value }
  }
  try {
    tester.body()
  } finally {
    tester.cancel()
  }
}

[JakeWharton]

Yeah I'll think about this tomorrow

[veyndan]

I'm gonna merge this for now. I'm happy to create a follow-up PR that updates the generation of TestSchemaTester such that this custom TestSchemaTester can be deleted, either by updating it as it is here, or in a different way that'd allow custom factory implementations to be passed in.