public class Main {
    public static void main(String[] args) {
        Secant s = new Secant();

        Function x2 = new X2();//Creating a reference of the interface Function
                                //(x2) that is pointing to an object of X2.
        System.out.println("Testing the secant-method for x^2-6");
        //According to Wolfram Alpha the root for "x^2-6" should be 0.774597.
        //Since we have eps= 10e-6, we should have 5 correctly decimals
        //(10^(1)*10^(-6)=10^(-5)).
        double rot = s.secant(x2, 0, 4, 10e-6);
        System.out.println("Roten för " + x2 + " är " + rot);

        double realRoot = 0.77459;
        if(realRoot <= rot + 10e-6 && realRoot >= rot - 10e-6){//Testing that
            //the realRoot is within the interval of our approximated root +/-
            //eps (10e-6)
            System.out.println("Test successful!\n");
        } else {
            System.out.println("Test failed\n");
        }

        //We can do the same with these functions to test that the root is
        //calculated correctly
        Function arctan = new Arctan();
        double rot2 = s.secant(arctan, -1, 1, 10e-6);
        System.out.println("Roten för " + arctan + " är " + rot2);

        Function sin = new Sin();
        double rot3 = s.secant(sin, -1, 1, 10e-6);
        System.out.println("Roten för " + sin + " är " + rot3);

        Function ln = new Ln();
        double rot4 = s.secant(ln, 0.3, 1, 10e-6);
        System.out.println("Roten för " + ln + " är " + rot4);

    }

}