using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using UnitTestSharp;
using Azimuth.Polynomials;

namespace Azimuth.UnitTests.Polynomials
{
    public class CubicTests : TestFixture
    {
        public void Correct()
        {
            RootList expected = new Scalar?[] { 2, 3, 4 };
            RootList actual = Cubic.Solve(1, -9, 26, -24);

            CheckEqual(expected, actual);
        }

        public void Multiplicity_3()
        {
            RootList expected = new Scalar?[] { 2, 2, 2 };
            RootList actual = Cubic.Solve(1, -6, 12, -8);

            CheckEqual(expected, actual);
        }

        public void Multiplicity_2_1null()
        {
            RootList expected = new Scalar?[] { 2, 2, };
            RootList actual = Cubic.Solve(0, 1, -4, 4);

            CheckEqual(expected, actual);
        }

        public void TEST_Cubic_B0()
        {
            RootList expected = new Scalar?[] { -3, 0, 3, };
            RootList actual = Cubic.Solve(1, 0, -9, 0);

            CheckEqual(expected, actual);
        }

        public void TEST_Cubic_C0()
        {
            RootList expected = new Scalar?[] { -1, 0, 0, };
            RootList actual = Cubic.Solve(1, 1, 0, 0);

            CheckEqual(expected, actual);
        }

        public void NoSolutions()
        {
            RootList expected = new Scalar?[] { };
            RootList actual = Cubic.Solve(0, 0, 0, 4);

            CheckEqual(expected, actual);
        }

        public void Multiplicity_2_1real()
        {
            RootList expected = new Scalar?[] { 0, 1, 1 };
            RootList actual = Cubic.Solve(1, -2, 1, 0);

            CheckEqual(expected, actual);
        }

        #region ThreeNumberSort
        //public void r_123()
        //{
        //    Scalar? r1, r2, r3;

        //    Cubic.Sort(1, 2, 3, out r1, out r2, out r3);

        //    CheckEqual(1, r1);
        //    CheckEqual(2, r2);
        //    CheckEqual(3, r3);
        //}

        //public void r_132()
        //{
        //    Scalar? r1, r2, r3;

        //    Cubic.Sort(1, 3, 2, out r1, out r2, out r3);

        //    CheckEqual(1, r1);
        //    CheckEqual(2, r2);
        //    CheckEqual(3, r3);
        //}

        //public void r_213()
        //{
        //    Scalar? r1, r2, r3;

        //    Cubic.Sort(2, 1, 3, out r1, out r2, out r3);

        //    CheckEqual(1, r1);
        //    CheckEqual(2, r2);
        //    CheckEqual(3, r3);
        //}

        //public void r_231()
        //{
        //    Scalar? r1, r2, r3;

        //    Cubic.Sort(2, 3, 1, out r1, out r2, out r3);

        //    CheckEqual(1, r1);
        //    CheckEqual(2, r2);
        //    CheckEqual(3, r3);
        //}

        //public void r_312()
        //{
        //    Scalar? r1, r2, r3;

        //    Cubic.Sort(3, 1, 2, out r1, out r2, out r3);

        //    CheckEqual(1, r1);
        //    CheckEqual(2, r2);
        //    CheckEqual(3, r3);
        //}

        //public void r_321()
        //{
        //    Scalar? r1, r2, r3;

        //    Cubic.Sort(3, 2, 1, out r1, out r2, out r3);

        //    CheckEqual(1, r1);
        //    CheckEqual(2, r2);
        //    CheckEqual(3, r3);
        //}
        #endregion
    }
}