public void IgnoreIfSourceIsNullOrZero_DoesNotMapField_WhenHasNullOrZeroOrEquivalentValue() { var config = new MapperConfiguration(cfg => cfg.CreateMap <Apple, Orange>() .ForAllMembers(c => c.IgnoreIfSourceIsNullOrZero()) ); var mapper = config.CreateMapper(); var orange = new Orange { A = new DateTime(2001, 1, 1), B = "Orange", C = 1, D = 2.0, E = TestEnum.Something }; var apple1 = new Apple { A = new DateTime(2001, 12, 12), B = "Apple1", C = 10, D = 100.0, E = TestEnum.SomethingElse }; var apple2 = new Apple { A = DateTime.MinValue, B = null, C = null, D = 0, E = TestEnum.None }; var orange1 = mapper.Map <Apple, Orange>(apple1, orange.ToJson().FromJson <Orange>()); Assert.Equal(orange1.ToJson(), apple1.ToJson()); var orange2 = mapper.Map <Apple, Orange>(apple2, orange.ToJson().FromJson <Orange>()); Assert.Equal(orange2.ToJson(), orange.ToJson()); }