public void TestMethod()
        {
            _unitOfWorkMock.InitializeRepository <IPupilRepository, Pupil>(new List <Pupil>
            {
                new Pupil {
                    PupilId = 1, FirstName = "FirstName", MiddleName = "MiddleName", LastName = "LastName", BirthDate = DateTime.Now
                }
            });

            var actual = _pupilService.GetPupilsBornThisDate(DateTime.Today);
        }