diff -r 69928a704ffb -r 7afc121e0689 test/mip_test.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/mip_test.cc	Tue Dec 02 21:40:33 2008 +0100
@@ -0,0 +1,126 @@
+/* -*- mode: C++; indent-tabs-mode: nil; -*-
+ *
+ * This file is a part of LEMON, a generic C++ optimization library.
+ *
+ * Copyright (C) 2003-2008
+ * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
+ * (Egervary Research Group on Combinatorial Optimization, EGRES).
+ *
+ * Permission to use, modify and distribute this software is granted
+ * provided that this copyright notice appears in all copies. For
+ * precise terms see the accompanying LICENSE file.
+ *
+ * This software is provided "AS IS" with no warranty of any kind,
+ * express or implied, and with no claim as to its suitability for any
+ * purpose.
+ *
+ */
+
+#include "test_tools.h"
+
+
+#ifdef HAVE_CONFIG_H
+#include <lemon/config.h>
+#endif
+
+#ifdef HAVE_CPLEX
+#include <lemon/mip_cplex.h>
+#endif
+
+#ifdef HAVE_GLPK
+#include <lemon/mip_glpk.h>
+#endif
+
+
+using namespace lemon;
+
+void solveAndCheck(MipSolverBase& lp, MipSolverBase::SolutionStatus stat,
+                   double exp_opt) {
+  using std::string;
+
+  lp.solve();
+  //int decimal,sign;
+  std::ostringstream buf;
+  buf << "Primalstatus should be: " << int(stat)
+      <<" and it is "<<int(lp.mipStatus());
+
+
+  //  itoa(stat,buf1, 10);
+  check(lp.mipStatus()==stat, buf.str());
+
+  if (stat ==  MipSolverBase::OPTIMAL) {
+    std::ostringstream sbuf;
+    buf << "Wrong optimal value: the right optimum is " << exp_opt;
+    check(std::abs(lp.primalValue()-exp_opt) < 1e-3, sbuf.str());
+    //+ecvt(exp_opt,2)
+  }
+}
+
+void aTest(MipSolverBase& mip)
+{
+ //The following example is very simple
+
+
+  typedef MipSolverBase::Row Row;
+  typedef MipSolverBase::Col Col;
+
+
+
+  Col x1 = mip.addCol();
+  Col x2 = mip.addCol();
+
+
+  //Objective function
+  mip.obj(x1);
+
+  mip.max();
+
+
+  //Unconstrained optimization
+  mip.solve();
+  //Check it out!
+
+  //Constraints
+  mip.addRow(2*x1+x2 <=2);
+  mip.addRow(x1-2*x2 <=0);
+
+  //Nonnegativity of the variable x1
+  mip.colLowerBound(x1, 0);
+
+  //Maximization of x1
+  //over the triangle with vertices (0,0),(4/5,2/5),(0,2)
+  double expected_opt=4.0/5.0;
+  solveAndCheck(mip, MipSolverBase::OPTIMAL, expected_opt);
+
+  //Restrict x2 to integer
+  mip.colType(x2,MipSolverBase::INT);
+  expected_opt=1.0/2.0;
+  solveAndCheck(mip, MipSolverBase::OPTIMAL, expected_opt);
+
+
+  //Restrict both to integer
+  mip.colType(x1,MipSolverBase::INT);
+  expected_opt=0;
+  solveAndCheck(mip, MipSolverBase::OPTIMAL, expected_opt);
+
+
+
+}
+
+
+int main()
+{
+
+#ifdef HAVE_GLPK
+  MipGlpk mip1;
+  aTest(mip1);
+#endif
+
+#ifdef HAVE_CPLEX
+  MipCplex mip2;
+  aTest(mip2);
+#endif
+
+  return 0;
+
+}