public void TestEvaluate_Double()
{
string expected = "15565";
string polyString = "10000*x^4 + 125*y^3 + 500*x^2 + 75*y + 13";
MultivariatePolynomial poly = MultivariatePolynomial.Parse(polyString);
List <Tuple <char, double> > indeterminants = new List <Tuple <char, double> >()
{
new Tuple <char, double>('x', 1.1d),
new Tuple <char, double>('y', 1.2d),
};
double result = poly.Evaluate(indeterminants);
string actual = result.ToString();
TestContext.WriteLine($"Result: \"{actual}\".");
Assert.AreEqual(expected, actual, $"Test of: MultivariatePolynomial.Evaluate({polyString}) where {string.Join(" and ", indeterminants.Select(tup => $"{tup.Item1} = {tup.Item2}"))}");
}
public void TestEvaluate_Complex()
{
string expected = "(0, 0)";
string polyString = "x^2 + 1";
MultivariatePolynomial poly = MultivariatePolynomial.Parse(polyString);
List <Tuple <char, Complex> > indeterminants = new List <Tuple <char, Complex> >()
{
new Tuple <char, Complex>('x', Complex.ImaginaryOne)
};
Complex evaluated = poly.Evaluate(indeterminants);
Complex result = new Complex(Math.Round(evaluated.Real, 1), Math.Round(evaluated.Imaginary, 1));
string actual = result.ToString();
TestContext.WriteLine($"Result: \"{actual}\".");
Assert.AreEqual(expected, actual, $"Test of: MultivariatePolynomial.Evaluate({polyString}) where x = sqrt(-1)");
}
public void TestEvaluate_BigInteger()
{
string expected = "8551120982818029391";
string polyString = "2*x^4 + 13*y^3 + 29*x^2 + 29*y + 13";
MultivariatePolynomial poly = MultivariatePolynomial.Parse(polyString);
List <Tuple <char, BigInteger> > indeterminants = new List <Tuple <char, BigInteger> >()
{
new Tuple <char, BigInteger>('x', 45468),
new Tuple <char, BigInteger>('y', 63570),
};
BigInteger result = poly.Evaluate(indeterminants);
string actual = result.ToString();
TestContext.WriteLine($"Result: \"{actual}\".");
Assert.AreEqual(expected, actual, $"Test of: MultivariatePolynomial.Evaluate({polyString}) where {string.Join(" and ", indeterminants.Select(tup => $"{tup.Item1} = {tup.Item2}"))}");
}
