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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.minisat.constraints;
31  
32  import junit.framework.TestCase;
33  
34  import org.sat4j.minisat.constraints.cnf.Lits;
35  import org.sat4j.minisat.core.ILits;
36  
37  /*
38   * Created on 30 oct. 2003
39   *
40   */
41  
42  /**
43   * @author leberre
44   * 
45   */
46  public class LitTest extends TestCase {
47  
48      private ILits lits;
49  
50      /**
51       * Constructor for LitTest.
52       * 
53       * @param arg0
54       */
55      public LitTest(String arg0) {
56          super(arg0);
57      }
58  
59      /*
60       * @see TestCase#setUp()
61       */
62      @Override
63      protected void setUp() throws Exception {
64          super.setUp();
65          this.lits = new Lits();
66      }
67  
68      public void testNot() {
69          this.lits.ensurePool(5);
70          int lit = this.lits.getFromPool(-5);
71          assertEquals(this.lits.getFromPool(5), lit ^ 1);
72      }
73  
74      public void testVar() {
75          this.lits.ensurePool(10);
76          int lit = this.lits.getFromPool(-5);
77          assertEquals(5, lit >> 1);
78          lit = this.lits.getFromPool(10);
79          assertEquals(10, lit >> 1);
80  
81      }
82  
83      /*
84       * Test pour boolean equals(Object)
85       */
86      public void testEqualsObject() {
87          this.lits.ensurePool(3);
88          int lit = this.lits.getFromPool(-3);
89          assertEquals(this.lits.getFromPool(-3), lit);
90          assertEquals(this.lits.getFromPool(3), lit ^ 1);
91          assertFalse(this.lits.getFromPool(1) == this.lits.getFromPool(2));
92      }
93  
94      /*
95       * Test pour String toString()
96       */
97      public void testToString() {
98          this.lits.ensurePool(3);
99          int lit = this.lits.getFromPool(-3);
100         assertEquals("-3", Lits.toString(lit));
101         assertEquals("3", Lits.toString(lit ^ 1));
102     }
103 
104     public void testTruthValue() {
105         this.lits.ensurePool(3);
106         int lit = this.lits.getFromPool(-2);
107         assertTrue(this.lits.isUnassigned(lit));
108         assertTrue(this.lits.isUnassigned(lit ^ 1));
109         this.lits.satisfies(lit);
110         assertTrue(this.lits.isSatisfied(lit));
111         assertFalse(this.lits.isFalsified(lit));
112         assertFalse(this.lits.isUnassigned(lit));
113         assertFalse(this.lits.isSatisfied(lit ^ 1));
114         assertTrue(this.lits.isFalsified(lit ^ 1));
115         assertFalse(this.lits.isUnassigned(lit ^ 1));
116         this.lits.unassign(lit);
117         assertTrue(this.lits.isUnassigned(lit));
118         assertTrue(this.lits.isUnassigned(lit ^ 1));
119 
120     }
121 
122 }