public void AddYearsToAge_notNegative()
{
//Arrange
var TestPerson = new RealPerson("Henk", 10);
//Act
TestPerson.AddYearsToAge(-1);
int Result = TestPerson.Age;
//Assert
Assert.AreEqual(10, Result);
}
public void AddYearsToAge_notOlderThan100()
{
//Arrange
var TestPerson = new RealPerson("Henk", 100);
//Act
TestPerson.AddYearsToAge(1);
int Result = TestPerson.Age;
//Assert
Assert.AreEqual(100, Result);
}