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source: branches/SuccessProgressAnalysis/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.3/Tests/SubtreeCrossoverTest.cs @ 5615

Last change on this file since 5615 was 5367, checked in by gkronber, 14 years ago

#1136 Fixed test cases for symbolic expression tree encoding operators (+ minor bug fixes in symbolic expression tree operators).

File size: 3.6 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2010 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 System;
23using System.Collections.Generic;
24using System.Diagnostics;
25using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
26using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.Creators;
27using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.Crossovers;
28using HeuristicLab.Random;
29using Microsoft.VisualStudio.TestTools.UnitTesting;
30
31namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding_3._3.Tests {
32  [TestClass]
33  public class SubtreeCrossoverTest {
34    private const int POPULATION_SIZE = 1000;
35    private TestContext testContextInstance;
36
37    /// <summary>
38    ///Gets or sets the test context which provides
39    ///information about and functionality for the current test run.
40    ///</summary>
41    public TestContext TestContext {
42      get {
43        return testContextInstance;
44      }
45      set {
46        testContextInstance = value;
47      }
48    }
49
50    [TestMethod()]
51    public void SubtreeCrossoverDistributionsTest() {
52      int generations = 5;
53      var trees = new List<SymbolicExpressionTree>();
54      var grammar = Grammars.CreateArithmeticAndAdfGrammar();
55      var random = new MersenneTwister(31415);
56      List<SymbolicExpressionTree> crossoverTrees;
57      double msPerCrossoverEvent;
58
59      for (int i = 0; i < POPULATION_SIZE; i++) {
60        trees.Add(ProbabilisticTreeCreator.Create(random, grammar, 100, 10, 3, 3));
61      }
62      Stopwatch stopwatch = new Stopwatch();
63      stopwatch.Start();
64      for (int gCount = 0; gCount < generations; gCount++) {
65        var newPopulation = new List<SymbolicExpressionTree>();
66        for (int i = 0; i < POPULATION_SIZE; i++) {
67          var par0 = (SymbolicExpressionTree)trees.SelectRandom(random).Clone();
68          var par1 = (SymbolicExpressionTree)trees.SelectRandom(random).Clone();
69          bool success;
70          newPopulation.Add(SubtreeCrossover.Cross(random, par0, par1, 0.9, 100, 10, out success));
71          Assert.IsTrue(success);
72        }
73        crossoverTrees = newPopulation;
74      }
75      stopwatch.Stop();
76      foreach (var tree in trees)
77        Util.IsValid(tree);
78
79      msPerCrossoverEvent = stopwatch.ElapsedMilliseconds / (double)POPULATION_SIZE / (double)generations;
80
81      Console.WriteLine("SubtreeCrossover: " + Environment.NewLine +
82        msPerCrossoverEvent + " ms per crossover event (~" + Math.Round(1000.0 / (msPerCrossoverEvent)) + "crossovers / s)" + Environment.NewLine +
83        Util.GetSizeDistributionString(trees, 105, 5) + Environment.NewLine +
84        Util.GetFunctionDistributionString(trees) + Environment.NewLine +
85        Util.GetNumberOfSubTreesDistributionString(trees) + Environment.NewLine +
86        Util.GetTerminalDistributionString(trees) + Environment.NewLine
87        );
88    }
89  }
90}
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