1. type Mocked[T] = ref object
2.     expectations* : int
3.     calls*: seq[string]
4.  
5. method add_call(m : Mocked, param : string)  = # not generalized
6.     add(m.calls, param)
7.     m.expectations-=1
8.  
9. method expect(m : Mocked, num : int)  = # not generalized
10.     m.expectations+=num
11.  
12. method verify(m : Mocked)  = # not generalized
13.     if m.expectations > 0:
14.         raise newException(Defect, "Not all expectations met!")
15.  
16. type RealExecute = ref object
17.  
18.  
19. method execute(obj : RealExecute, process_name : string) =
20.     echo "impl"
21.  
22.  
23. method execute(obj : Mocked[RealExecute], process_name : string) =
24.     echo "mocked"
25.     obj.add_call(process_name)
26.  
27.  
28. var object_used_in_code : RealExecute
29. var object_used_in_ut : Mocked[RealExecute]
30. new object_used_in_code
31. new object_used_in_ut
32.  
33. proc exec[T](systemwrapper : T) =
34.     systemwrapper.execute("test")
35.  
36.  
37. object_used_in_ut.expect(3)
38. exec(object_used_in_code)
39. exec(object_used_in_ut)
40. exec(object_used_in_ut)
41. object_used_in_ut.verify()