docs: Tab UI Widget Test

[jensencelestial]

Description

Is there any documentation on how to create Widget Tests for Tab UI? Found this TODOs Doc that has 2 "tabs", each tab has its own BlocProvider. Can we create a Widget Test for HomeView that properly renders the IndexedStack? I don't know if there's any way we can mock/stub a BlocProvider.

Also found this which uses TabBar and also uses BlocProvider for each tab, but no Widget Tests.

[felangel]

I recommend decomposing your widgets into "container" widgets which provide the necessary dependencies (e.g. BlocProviders) and "presentation" widgets which just render UI. This way you can test the presentation widgets by wrapping them in your own BlocProvider in the test which provides a mock bloc instance.

Hope that helps! 👍