public void Div(Rational r1, Rational r2)
{
RationalBase result = r1.Div(r2);
Assert.True(r1 != result && r2 != result);
int n1 = r1.Numerator, d1 = r1.Denominator, n2 = r2.Numerator, d2 = r2.Denominator;
Assert.Equal(new Rational(n1 * d2, d1 * n2), result);
}
public void DivZeroFail(Rational r, int n, int d)
{
Assert.Throws <InvalidOperationException>(() => r.Div(new Rational(0, 1)));
}
public void DivFail(Rational r, int n, int d)
{
Assert.Throws <InvalidOperationException>(() => r.Div(null));
}
