public void AgeThisYear_IsInvalid()
{
// Arrange
FutureAge age = new FutureAge();
age.BirthYear = 2018;
int?actual;
int notExpected = 1;
// Act
actual = age.AgeThisYear();
// Assert
Assert.AreNotEqual(notExpected, actual);
}
public void AgeThisYear_IsValid()
{
// Arrange
FutureAge age = new FutureAge();
age.BirthYear = 2019;
int?actual;
int expected = 1;
// Act
actual = age.AgeThisYear();
// Assert
Assert.AreEqual(expected, actual);
}