1 /******************************************************************************* 2 * SAT4J: a SATisfiability library for Java Copyright (C) 2004, 2012 Artois University and CNRS 3 * 4 * All rights reserved. This program and the accompanying materials 5 * are made available under the terms of the Eclipse Public License v1.0 6 * which accompanies this distribution, and is available at 7 * http://www.eclipse.org/legal/epl-v10.html 8 * 9 * Alternatively, the contents of this file may be used under the terms of 10 * either the GNU Lesser General Public License Version 2.1 or later (the 11 * "LGPL"), in which case the provisions of the LGPL are applicable instead 12 * of those above. If you wish to allow use of your version of this file only 13 * under the terms of the LGPL, and not to allow others to use your version of 14 * this file under the terms of the EPL, indicate your decision by deleting 15 * the provisions above and replace them with the notice and other provisions 16 * required by the LGPL. If you do not delete the provisions above, a recipient 17 * may use your version of this file under the terms of the EPL or the LGPL. 18 * 19 * Based on the original MiniSat specification from: 20 * 21 * An extensible SAT solver. Niklas Een and Niklas Sorensson. Proceedings of the 22 * Sixth International Conference on Theory and Applications of Satisfiability 23 * Testing, LNCS 2919, pp 502-518, 2003. 24 * 25 * See www.minisat.se for the original solver in C++. 26 * 27 * Contributors: 28 * CRIL - initial API and implementation 29 *******************************************************************************/ 30 package org.sat4j.pb; 31 32 import static org.junit.Assert.assertEquals; 33 34 import java.math.BigInteger; 35 36 import org.junit.Test; 37 import org.sat4j.core.Vec; 38 import org.sat4j.core.VecInt; 39 import org.sat4j.specs.ContradictionException; 40 import org.sat4j.specs.IVec; 41 import org.sat4j.specs.IVecInt; 42 43 public class PbmOPBStringSolver { 44 45 private static final String STRING1 = "* #variable= 3 #constraint= 1\n+1 x1 +1 x2 +1 x3 >= 1 ;\n"; 46 private static final String STRING2 = "* #variable= 3 #constraint= 1\n" 47 + "min: +10 x2 +32 x3 ;\n+1 x1 +1 x2 +1 x3 >= 1 ;\n"; 48 49 @Test 50 public void testNoMin() throws ContradictionException { 51 IPBSolver solver = new OPBStringSolver(); 52 solver.newVar(3); 53 IVecInt clause = new VecInt(); 54 clause.push(1).push(2).push(3); 55 solver.addClause(clause); 56 assertEquals(STRING1, solver.toString()); 57 } 58 59 @Test 60 public void testWithMin() throws ContradictionException { 61 IPBSolver solver = new OPBStringSolver(); 62 solver.newVar(3); 63 IVecInt clause = new VecInt(); 64 clause.push(1).push(2).push(3); 65 solver.addClause(clause); 66 IVecInt vars = new VecInt(); 67 vars.push(2).push(3); 68 IVec<BigInteger> coeffs = new Vec<BigInteger>(); 69 coeffs.push(BigInteger.TEN).push(BigInteger.valueOf(32)); 70 ObjectiveFunction obj = new ObjectiveFunction(vars, coeffs); 71 solver.setObjectiveFunction(obj); 72 assertEquals(STRING2, solver.toString()); 73 74 } 75 }