How mock a final class about mocktail HOT 1 CLOSED

AFAIK this is only possible with some goodwill from the package maintainers.

If you have access to the class library (which is not the case for ProcessResult), the solution is to provide the interface of the class as a test-only interface class:

@visibleForTesting
interface class YouCantMockMeInterface {
 /// mockable stuff, go here
}

final class YouCantMockMe implements YouCantMockMeInterface {}

In this way, mocks can be done on methods and elements that use the YouCantMockMeInterface as type.

from mocktail.