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+// Copyright (C) 2015 - IIT Bombay - FOSSEE
+//
+// Author: Harpreet Singh
+// Organization: FOSSEE, IIT Bombay
+// Email: harpreet.mertia@gmail.com
+//
+// This file must be used under the terms of the CeCILL.
+// This source file is licensed as described in the file COPYING, which
+// you should have received as part of this distribution.  The terms
+// are also available at
+// http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+
+// <-- JVM NOT MANDATORY -->
+// <-- ENGLISH IMPOSED -->
+
+
+//
+// assert_close --
+//   Returns 1 if the two real matrices computed and expected are close,
+//   i.e. if the relative distance between computed and expected is lesser than epsilon.
+// Arguments
+//   computed, expected : the two matrices to compare
+//   epsilon : a small number
+//
+function flag = assert_close ( computed, expected, epsilon )
+  if expected==0.0 then
+    shift = norm(computed-expected);
+  else
+    shift = norm(computed-expected)/norm(expected);
+  end
+//  if shift < epsilon then
+//    flag = 1;
+//  else
+//    flag = 0;
+//  end
+//  if flag <> 1 then pause,end
+    flag = assert_checktrue ( shift < epsilon );
+endfunction
+//
+// assert_equal --
+//   Returns 1 if the two real matrices computed and expected are equal.
+// Arguments
+//   computed, expected : the two matrices to compare
+//   epsilon : a small number
+//
+//function flag = assert_equal ( computed , expected )
+//  if computed==expected then
+//    flag = 1;
+//  else
+//    flag = 0;
+//  end
+//  if flag <> 1 then pause,end
+//endfunction
+
+// A basic lsqnonneg problem
+C = [
+	0.0372    0.2869
+	0.6861    0.7071
+	0.6233    0.6245
+	0.6344    0.6170];
+d = [
+	0.8587
+	0.1781
+	0.0747
+	0.8405];
+[xopt,resnorm,residual,exitflag,output,lambda] = lsqnonneg(C,d)
+
+assert_close ( xopt , [ 0 0.6929344 ]' , 0.0005 );
+assert_close ( residual , [0.6598971 -0.3118739 -0.3580375 0.4129595]' , 0.0005 );
+assert_close ( resnorm , [ 0.8314560] , 0.0005 );
+assert_checkequal( exitflag , int32(0) );
+printf("Test Successful");