diff -r e7017ec2d5cd -r 3314f58e7b25 test/mip_test.cc
--- a/test/mip_test.cc	Thu Apr 02 19:29:56 2009 +0200
+++ b/test/mip_test.cc	Wed Apr 01 22:58:58 2009 +0200
@@ -18,7 +18,6 @@
 
 #include "test_tools.h"
 
-
 #ifdef HAVE_CONFIG_H
 #include <lemon/config.h>
 #endif
@@ -31,6 +30,10 @@
 #include <lemon/glpk.h>
 #endif
 
+#ifdef HAVE_CBC
+#include <lemon/cbc.h>
+#endif
+
 
 using namespace lemon;
 
@@ -57,14 +60,13 @@
 
 void aTest(MipSolver& mip)
 {
- //The following example is very simple
+  //The following example is very simple
 
 
   typedef MipSolver::Row Row;
   typedef MipSolver::Col Col;
 
 
-
   Col x1 = mip.addCol();
   Col x2 = mip.addCol();
 
@@ -74,23 +76,24 @@
 
   mip.max();
 
-
   //Unconstrained optimization
   mip.solve();
   //Check it out!
 
   //Constraints
-  mip.addRow(2*x1+x2 <=2);
-  mip.addRow(x1-2*x2 <=0);
+  mip.addRow(2 * x1 + x2 <= 2);
+  Row y2 = 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, MipSolver::OPTIMAL, expected_opt);
 
+
   //Restrict x2 to integer
   mip.colType(x2,MipSolver::INTEGER);
   expected_opt=1.0/2.0;
@@ -102,10 +105,15 @@
   expected_opt=0;
   solveAndCheck(mip, MipSolver::OPTIMAL, expected_opt);
 
-
+  //Erase a variable
+  mip.erase(x2);
+  mip.rowUpperBound(y2, 8);
+  expected_opt=1;
+  solveAndCheck(mip, MipSolver::OPTIMAL, expected_opt);
 
 }
 
+
 template<class MIP>
 void cloneTest()
 {
@@ -144,6 +152,14 @@
   }
 #endif
 
+#ifdef HAVE_CBC
+  {
+    CbcMip mip1;
+    aTest(mip1);
+    cloneTest<CbcMip>();
+  }
+#endif
+
   return 0;
 
 }