I am looking into Espresso Framework to adopt the best practices for writing tests for a multi modular Android projects ( MVI/MVVM ). Is it a good idea to cover/write all the Espresso tests inside the app module (or) it needs to be isolated specific to each modules? Is there any other best practices for MVI/MVVM based Android projects? if so, please comment and provide references if any Language used: Kotlin

Best practices writing Espresso tests for a multi modular Android projects (MVI/MVVM)

I am looking into Espresso Framework to adopt the best practices for writing tests for a multi modular Android projects (MVI/MVVM).

Is it a good idea to cover/write all the Espresso tests inside the app module (or) it needs to be isolated specific to each modules?
Is there any other best practices for MVI/MVVM based Android projects? if so, please comment and provide references if any

Language used: Kotlin