public static void ChangePerson_NotNull()
        {
            Person person = new Person();

            person.BirthDay   = DateTime.Now;
            person.FirstName  = "first name";
            person.MiddleName = "middle Name";
            person.LastName   = "middle Name";
            person.PersonID   = 10;
            var rezult = _authorsController.ChangePerson(person);

            Assert.NotNull(rezult);
        }