mathnet-numerics/src/UnitTests/LinearAlgebraTests/Complex/UserDefinedMatrixTests.cs

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namespace MathNet.Numerics.UnitTests.LinearAlgebraTests.Complex
{
    using System.Numerics;
    using LinearAlgebra.Complex;
    using LinearAlgebra.Generic;

    internal class UserDefinedMatrix : Matrix
    {
        private readonly Complex[,] _data;

        public UserDefinedMatrix(int order) : base(order, order)
        {
            _data = new Complex[order, order];
        }

        public UserDefinedMatrix(int rows, int columns) : base(rows, columns)
        {
            _data = new Complex[rows, columns];
        }

        public UserDefinedMatrix(Complex[,] data) : base(data.GetLength(0), data.GetLength(1))
        {
            _data = (Complex[,])data.Clone();
        }

        public override Complex At(int row, int column)
        {
            return _data[row, column];
        }

        public override void At(int row, int column, Complex value)
        {
            _data[row, column] = value;
        }

        public override Matrix<Complex> CreateMatrix(int numberOfRows, int numberOfColumns)
        {
            return new UserDefinedMatrix(numberOfRows, numberOfColumns);
        }

        public override Vector<Complex> CreateVector(int size)
        {
            return new UserDefinedVector(size);
        }

        public static UserDefinedMatrix Identity(int order)
        {
            var m = new UserDefinedMatrix(order, order);
            for (var i = 0; i < order; i++)
            {
                m[i, i] = 1.0;
            }

            return m;
        }
    }

    public class UserDefinedMatrixTests : MatrixTests
    {
        protected override Matrix<Complex> CreateMatrix(int rows, int columns)
        {
            return new UserDefinedMatrix(rows, columns);
        }

        protected override Matrix<Complex> CreateMatrix(Complex[,] data)
        {
            return new UserDefinedMatrix(data);
        }

        protected override Vector<Complex> CreateVector(int size)
        {
            return new UserDefinedVector(size);
        }

        protected override Vector<Complex> CreateVector(Complex[] data)
        {
            return new UserDefinedVector(data);
        }
    }
}