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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;
31  
32  import static org.junit.Assert.assertNotNull;
33  import static org.junit.Assert.assertTrue;
34  import static org.junit.Assert.fail;
35  
36  import java.io.ByteArrayInputStream;
37  import java.io.IOException;
38  
39  import org.junit.Test;
40  import org.sat4j.minisat.SolverFactory;
41  import org.sat4j.reader.DimacsReader;
42  import org.sat4j.reader.InstanceReader;
43  import org.sat4j.reader.LecteurDimacs;
44  import org.sat4j.reader.ParseFormatException;
45  import org.sat4j.specs.ContradictionException;
46  import org.sat4j.specs.IProblem;
47  import org.sat4j.specs.TimeoutException;
48  
49  public class BugSAT25 {
50  
51      @Test(expected = UnsupportedOperationException.class)
52      public void testReaderFromInstanceReader() throws ParseFormatException,
53              ContradictionException, IOException {
54          String cnfString = "p cnf 3 4\n1 2 3 0\n-1 -2 0\n-1 -3 0\n-2 -3 0";
55          InstanceReader reader = new InstanceReader(SolverFactory.newDefault());
56          reader.parseInstance(new ByteArrayInputStream(cnfString.getBytes()));
57          fail();
58      }
59  
60      @Test
61      public void testReaderFromDimacsReader() throws ParseFormatException,
62              ContradictionException, IOException, TimeoutException {
63          String cnfString = "p cnf 3 4\n1 2 3 0\n-1 -2 0\n-1 -3 0\n-2 -3 0";
64          DimacsReader reader = new DimacsReader(SolverFactory.newDefault());
65          IProblem problem = reader.parseInstance(new ByteArrayInputStream(
66                  cnfString.getBytes()));
67          assertNotNull(problem);
68          assertTrue(problem.isSatisfiable());
69      }
70  
71      @Test
72      public void testReaderFromLecteurDimacs() throws ParseFormatException,
73              ContradictionException, IOException, TimeoutException {
74          String cnfString = "p cnf 3 4\n1 2 3 0\n-1 -2 0\n-1 -3 0\n-2 -3 0";
75          LecteurDimacs reader = new LecteurDimacs(SolverFactory.newDefault());
76          IProblem problem = reader.parseInstance(new ByteArrayInputStream(
77                  cnfString.getBytes()));
78          assertNotNull(problem);
79          assertTrue(problem.isSatisfiable());
80      }
81  }