public void Derivative_CosSin_CorrectResultReturned()
{
Function a = new Cos();
Function b = new Sin();
var c = new FunctionComposition(a, b);
const double X = 1;
var expectedResult = Math.Sin(-Math.Cos(X));
Assert.AreEqual(expectedResult, c.Derivative().ValueAtPoint(X));
}
public void BuiltFunction_LinearAndPolynomial_CorrectResultReturned()
{
const string function = "fc l x+3(p x^3-5)";
var res = new AddInStorageBuilder().BuildFunction(function);
var expectedResult = new FunctionComposition(new Linear(1, 3), new Polynomial(new List <double> {
-5, 0, 0, 1
}));
Assert.AreEqual(expectedResult, res);
}
