Hi Bartosz,

there is power in simplicity you introduce :)

I decide to try your way of stubbing methods and face with problem with methods with generics arguments.

Here is simple code:

protocol Screen {
}
protocol Navigator {
    func show<ScreenType: Screen>(_ screen: ScreenType) 
}
final class NavigatorStub: Navigator {
    // MARK: - Stubs
    lazy var showStub = stub(of: show) // Generic parameter 'ScreenType' could not be inferred
    // MARK: - API
    func show<ScreenType: Screen>(_ screen: ScreenType) {
        showStub(screen)
    }
}

Did you notice this use case?