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diff --git a/tests/unit_tests/intfminbnd.dia.ref b/tests/unit_tests/intfminbnd.dia.ref
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+// Copyright (C) 2017 - IIT Bombay - FOSSEE
+//
+// Author: Georgey John
+// Organization: FOSSEE, IIT Bombay
+// Email: toolbox@scilab.in
+//
+// 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
+
+
+//Bound constrained optimization
+function y=f(x)
+y= x(1)^2 + x(2)^2 + 19*x(1) +5*x(2);
+endfunction
+
+x1=[4.5,7];
+
+x2=[10,9];
+
+intcon=[1 2];
+
+//Calling fminunc function
+[xopt,fopt,exitflag,gradient,hessian]=intfminbnd(f,intcon,x1,x2)
+
+assert_close ( xopt , [ 5 7 ]' , 0.0005 );
+assert_close ( fopt , [ 204 ]' , 0.0005 );
+assert_checkequal( double(exitflag) , 0 );
+printf("Test Successful");
+\ No newline at end of file