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source: trunk/sources/HeuristicLab.Tests/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding-3.4/ChangeNodeTypeManipulationTest.cs @ 9770

Last change on this file since 9770 was 9770, checked in by mkommend, 11 years ago

#2088: Removed useless brackets in the TestMethod attribute and added test categories and properties for SymExpTreeEncoding unit test.

File size: 2.9 KB
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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2013 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 HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
25using HeuristicLab.Random;
26using Microsoft.VisualStudio.TestTools.UnitTesting;
27
28namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.Tests {
29  [TestClass]
30  public class ChangeNodeTypeManipulationTest {
31    private const int POPULATION_SIZE = 1000;
32    private const int MAX_TREE_LENGTH = 100;
33    private const int MAX_TREE_DEPTH = 10;
34    private TestContext testContextInstance;
35
36    [TestMethod]
37    [TestCategory("Encodings.SymbolicExpressionTree")]
38    [TestProperty("Time", "medium")]
39    public void ChangeNodeTypeManipulationDistributionsTest() {
40      SymbolicExpressionTreeStringFormatter formatter = new SymbolicExpressionTreeStringFormatter();
41      var trees = new List<ISymbolicExpressionTree>();
42      var grammar = Grammars.CreateArithmeticAndAdfGrammar();
43      var random = new MersenneTwister(31415);
44      int failedEvents = 0;
45      for (int i = 0; i < POPULATION_SIZE; i++) {
46        var tree = ProbabilisticTreeCreator.Create(random, grammar, MAX_TREE_LENGTH, MAX_TREE_DEPTH);
47        string originalTree = formatter.Format(tree);
48        ChangeNodeTypeManipulation.ChangeNodeType(random, tree);
49        string manipulatedTree = formatter.Format(tree);
50        if (originalTree == manipulatedTree) failedEvents++;
51        Util.IsValid(tree);
52        trees.Add(tree);
53      }
54      Console.WriteLine("ChangeNodeTypeManipulation: " + Environment.NewLine +
55        "Failed events: " + failedEvents * 100.0 / POPULATION_SIZE + " %" + Environment.NewLine +
56        Util.GetSizeDistributionString(trees, 105, 5) + Environment.NewLine +
57        Util.GetFunctionDistributionString(trees) + Environment.NewLine +
58        Util.GetNumberOfSubtreesDistributionString(trees) + Environment.NewLine +
59        Util.GetTerminalDistributionString(trees) + Environment.NewLine
60        );
61      Assert.IsTrue(failedEvents * 100.0 / POPULATION_SIZE < 5.0); // only max 5% failed mutations are allowed
62    }
63  }
64}
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