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