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); }