public void OldestPersonTest_GivenPerson_CorrectResult(string firstName, string secondName, string sex, int age)
{
Person expectedPerson = new Person
{
FirstName = firstName,
LastName = secondName,
Sex = sex,
Age = age
};
CommandReceiver receiver = new CommandReceiver(list);
Assert.Equal(expectedPerson, receiver.OldestPerson());
}