public void NegativeOneAddedToOneThrowsException()
{
// arrange
var one = 1;
var addition = new Addition();
// act
Assert.Throws <ArgumentOutOfRangeException>(() => addition.AddTwoNonZeroPositiveIntegers(-1, 1));
}
public void OneIsNonZeroPositiveAndOneAddedToOneIsTwo()
{
// arrange
var one = 1;
var addition = new Addition();
// act
var result = addition.AddTwoNonZeroPositiveIntegers(one, one);
// assert
Assert.Equal(2, result);
}