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source: stable/HeuristicLab.Tests/HeuristicLab.Encodings.PermutationEncoding-3.3/PositionBasedCrossoverTest.cs @ 12328

Last change on this file since 12328 was 12009, checked in by ascheibe, 10 years ago

#2212 updated copyright year

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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using HeuristicLab.Core;
23using HeuristicLab.Tests;
24using Microsoft.VisualStudio.TestTools.UnitTesting;
25
26namespace HeuristicLab.Encodings.PermutationEncoding.Tests {
27  /// <summary>
28  ///This is a test class for PositionBasedCrossover and is intended
29  ///to contain all PositionBasedCrossover Unit Tests
30  ///</summary>
31  [TestClass()]
32  public class PositionBasedCrossoverTest {
33    /// <summary>
34    ///A test for Cross
35    ///</summary>
36    [TestMethod]
37    [TestCategory("Encodings.Permutation")]
38    [TestProperty("Time", "short")]
39    public void PositionBasedCrossoverCrossTest() {
40      TestRandom random = new TestRandom();
41      PositionBasedCrossover_Accessor target = new PositionBasedCrossover_Accessor(
42        new PrivateObject(typeof(PositionBasedCrossover)));
43
44      // perform a test with more than two parents
45      random.Reset();
46      bool exceptionFired = false;
47      try {
48        target.Cross(random, new ItemArray<Permutation>(new Permutation[] {
49          new Permutation(PermutationTypes.RelativeUndirected, 4), new Permutation(PermutationTypes.RelativeUndirected, 4), new Permutation(PermutationTypes.RelativeUndirected, 4) }));
50      } catch (System.InvalidOperationException) {
51        exceptionFired = true;
52      }
53      Assert.IsTrue(exceptionFired);
54    }
55
56    /// <summary>
57    ///A test for Apply
58    ///</summary>
59    [TestMethod]
60    [TestCategory("Encodings.Permutation")]
61    [TestProperty("Time", "short")]
62    public void PositionBasedCrossoverApplyTest() {
63      TestRandom random = new TestRandom();
64      Permutation parent1, parent2, expected, actual;
65
66      // The following test is based on an example from Larranaga, 1999. Genetic Algorithms for the Traveling Salesman Problem.
67      random.Reset();
68      random.IntNumbers = new int[] { 3, 1, 2, 5 };
69      parent1 = new Permutation(PermutationTypes.RelativeUndirected, new int[] { 0, 1, 2, 3, 4, 5, 6, 7 });
70      Assert.IsTrue(parent1.Validate());
71      parent2 = new Permutation(PermutationTypes.RelativeUndirected, new int[] { 1, 3, 5, 7, 6, 4, 2, 0 });
72      Assert.IsTrue(parent2.Validate());
73
74      expected = new Permutation(PermutationTypes.RelativeUndirected, new int[] { 0, 3, 5, 1, 2, 4, 6, 7 });
75      Assert.IsTrue(expected.Validate());
76      actual = PositionBasedCrossover.Apply(random, parent1, parent2);
77      Assert.IsTrue(actual.Validate());
78      Assert.IsTrue(Auxiliary.PermutationIsEqualByPosition(expected, actual));
79
80      // perform a test when two permutations are of unequal length
81      random.Reset();
82      bool exceptionFired = false;
83      try {
84        PositionBasedCrossover.Apply(random, new Permutation(PermutationTypes.RelativeUndirected, 8), new Permutation(PermutationTypes.RelativeUndirected, 6));
85      } catch (System.ArgumentException) {
86        exceptionFired = true;
87      }
88      Assert.IsTrue(exceptionFired);
89    }
90  }
91}
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