public void Multiply_xp1_xm1()
{
Polynomial poly = (_x + 1) * (_x - 1);
poly.AssertIsEqualTo(_x * _x - 1);
poly.DerivativeBy(_x).AssertIsEqualTo(2 * _x);
poly.DerivativeBy('y').AssertIsEqualTo(0);
}
public void Constructor_Default()
{
Polynomial v = default;
(v == 0).AssertIsTrue();
v.IsSingleTerm.AssertIsTrue();
v.IsConstant.AssertIsTrue();
v.ToString().AssertIsEqualTo("0");
v.AssertIsEqualTo(0);
v.AssertIsEqualTo(0);
(1 == v).AssertIsFalse();
v.DerivativeBy('a').AssertIsEqualTo(0);
(2 * v).AssertIsEqualTo(0);
(v / 2).AssertIsEqualTo(0);
v.GetOperation().Value().AssertIsEqualTo(0);
}
