[Quantproject-developers] QuantProject/t5_Testing/b1_ADT/LinearAlgebra TestLowerTriangular.cs, NONE, 1.1

[Glauco S. <gla...@us...>]

Update of /cvsroot/quantproject/QuantProject/t5_Testing/b1_ADT/LinearAlgebra
In directory sfp-cvsdas-2.v30.ch3.sourceforge.com:/tmp/cvs-serv14028

Added Files:
	TestLowerTriangular.cs 
Log Message:
Test for the class QuantProject.ADT.LinearAlgebra.LowerTriangular

--- NEW FILE: TestLowerTriangular.cs ---
/*
QuantProject - Quantitative Finance Library

TestLowerTriangular.cs
Copyright (C) 2011
Glauco Siliprandi

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

using System;
using NUnit.Framework;

using QuantProject.ADT.LinearAlgebra;

namespace QuantTesting.ADT.LinearAlgebra
{
	[TestFixture]
	/// <summary>
	/// Test for the class QuantProject.ADT.LinearAlgebra.LowerTriangular
	/// </summary>
	public class TestLowerTriangular
	{
		public TestLowerTriangular()
		{
		}
		[Test]
		public void TestGetInverse()
		{
			double[,] lowerTriangular = new double[ 3 , 3 ] {
				{ 3 , 0 , 0 } ,
				{ -2 , 2 , 0 } ,
				{ 4 , -3 , 1 } };

			double[,] inverse = LowerTriangular.GetInverse( lowerTriangular );

			// the inverse is
			//	1/3		0		0
			//	1/3		1/2		0
			//	-1/3	3/2		1			
			Assert.AreEqual( 3 , inverse.GetLength( 0 ) );
			Assert.AreEqual( 3 , inverse.GetLength( 1 ) );
			Assert.AreEqual( 0.33333333 , inverse[ 0 , 0 ] , 0.00000001 );
			Assert.AreEqual( 0 , inverse[ 0 , 1 ] );
			Assert.AreEqual( 0 , inverse[ 0 , 2 ] );
			Assert.AreEqual( 0.33333333 , inverse[ 1 , 0 ] , 0.00000001 );
			Assert.AreEqual( 0.5 , inverse[ 1 , 1 ] );
			Assert.AreEqual( 0 , inverse[ 1 , 2 ] );
			Assert.AreEqual( -0.33333333 , inverse[ 2 , 0 ] , 0.00000001 );
			Assert.AreEqual( 1.5 , inverse[ 2 , 1 ] );
			Assert.AreEqual( 1 , inverse[ 2 , 2 ] );
		}
	}
}