@VladislavSumin
I personally believe this is out of scope of Kaspresso.

For that to happen one needs an annotation processor that

1. reads the preview annotations and its parameters and creates a bitmap out of them
2. generate test classes for it.

There is already a solution for the first step and it is called Airbnb/showkase

• It generates a bitmap and creates a list with the bitmaps with all previews

Then one can use

1. A parameterized runner like AndroidTestParameterInjector from Google or Parameterized from Junit4. The idea is that every item in the list is a parameter -> each parameter is a test
2. Any screenshot testing framework, could be Paparazzi, Facebook, Shot, Dropshots or even Kaspresso

this is already done here for Paparazzi and Facebook:
https://github.com/davidvavra/showkase-screenshot-tests

Should be trivial to do the same for Kaspresso...