WPF Unit Testing

using System;
using System.Collections.Generic;
using System.Text;

namespace WPFSampleApplication
{
    /// <summary>
    /// Class that makes cacluations of doubles
    /// </summary>
    public class Calculations
    {
        /// <summary>
        /// Sums 2 doubles together
        /// </summary>
        /// <param name="x">The double to sum</param>
        /// <param name="y">The double to sum</param>
        /// <returns>The sum of the 2 doubles specified</returns>
        public double Sum(double x, double y)
        {
            return x + y;
        }
    }
}