// <copyright file="CompoundMonthlyReturnTests.cs" company="Math.NET">
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// http://numerics.mathdotnet.com
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using System;
using System.Collections.Generic;
using MathNet.Numerics.Financial;
using NUnit.Framework;

namespace MathNet.Numerics.UnitTests.FinancialTests
{
    [TestFixture]
    [Category("FinancialTests")]
    public class CompoundMonthlyReturnTests
    {
        [Test]
        [ExpectedException(typeof(ArgumentNullException))] //assert
        public void throws_when_input_data_is_null()
        {
            //arrange
            List<double> inputData = null;
            //act
            inputData.CompoundMonthlyReturn();
        }

        [Test]
        public void returns_undefined_with_empty_input_data()
        {
            //arrange
            List<double> inputData = new List<double>();
            //act
            var cmpdReturn = inputData.CompoundMonthlyReturn();
            //assert
            Assert.AreEqual(double.NaN, cmpdReturn);
        }

        [Test]
        public void calculates_the_compound_monthly_return()
        {
            //arrange
            var inputData = new[] { 0.2, 0.06, 0.01 };
            //act
            var cmpdReturn = inputData.CompoundMonthlyReturn();
            //assert
            AssertHelpers.AlmostEqual(0.0870999982199265, cmpdReturn, 15);
        }

        //Definitly need more tests here.  Would love to find test data for these stats similar to the .dat files used for other tests.
    }

}