public void Add(SimplifiedRational r1, SimplifiedRational r2)
{
RationalBase result = r1.Add(r2);
Assert.True(r1 != result && r2 != result);
int n1 = r1.Numerator, d1 = r1.Denominator, n2 = r2.Numerator, d2 = r2.Denominator;
Assert.Equal(new SimplifiedRational(n1 * d2 + n2 * d1, d1 * d2), result);
}
public void AddFail(SimplifiedRational r, int n, int d)
{
Assert.Throws <InvalidOperationException>(() => r.Add(null));
}
