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source: stable/HeuristicLab.Tests/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding-3.4/ArgumentCreaterTest.cs @ 15231

Last change on this file since 15231 was 14186, checked in by swagner, 8 years ago

#2526: Updated year of copyrights in license headers

File size: 3.3 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2016 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.Linq;
25using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
26using HeuristicLab.Random;
27using Microsoft.VisualStudio.TestTools.UnitTesting;
28
29namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.Tests {
30  [TestClass]
31  public class ArgumentCreaterTest {
32    private const int POPULATION_SIZE = 1000;
33    private const int MAX_TREE_LENGTH = 100;
34    private const int MAX_TREE_DEPTH = 10;
35
36    [TestMethod]
37    [TestCategory("Encodings.SymbolicExpressionTree")]
38    [TestProperty("Time", "long")]
39    public void ArgumentCreaterDistributionsTest() {
40      var trees = new List<ISymbolicExpressionTree>();
41      var grammar = Grammars.CreateArithmeticAndAdfGrammar();
42      var random = new MersenneTwister(31415);
43      int failedOps = 0;
44      for (int i = 0; i < POPULATION_SIZE; i++) {
45        ISymbolicExpressionTree tree;
46        do {
47          tree = ProbabilisticTreeCreator.Create(random, grammar, MAX_TREE_LENGTH, MAX_TREE_DEPTH);
48          SubroutineCreater.CreateSubroutine(random, tree, MAX_TREE_LENGTH, MAX_TREE_DEPTH, 3, 3);
49        } while (!TreeHasAdfWithParameter(tree, 3));
50        var success = ArgumentCreater.CreateNewArgument(random, tree, 60000, 100, 3, 3);
51        if (!success) failedOps++;
52        Util.IsValid(tree);
53        trees.Add(tree);
54      }
55      // difficult to make sure that create argument operations succeed because trees are macro-expanded can potentially become very big
56      // => just test if only a small proportion fails
57      Assert.IsTrue(failedOps < POPULATION_SIZE * 0.05); // only 5% may fail
58      Console.WriteLine("ArgumentCreator: " + Environment.NewLine +
59        "Failed operations: " + failedOps * 100.0 / POPULATION_SIZE + " %" + Environment.NewLine +
60        Util.GetSizeDistributionString(trees, 200, 20) + Environment.NewLine +
61        Util.GetFunctionDistributionString(trees) + Environment.NewLine +
62        Util.GetNumberOfSubtreesDistributionString(trees) + Environment.NewLine +
63        Util.GetTerminalDistributionString(trees) + Environment.NewLine
64        );
65    }
66
67    private bool TreeHasAdfWithParameter(ISymbolicExpressionTree tree, int maxParameters) {
68      if (tree.Root.Subtrees.Count() != 2) return false;
69      var firstAdf = tree.Root.GetSubtree(1);
70      return firstAdf.Grammar.GetAllowedChildSymbols(firstAdf.Symbol, 0).Where(x => x is Argument).Count() < maxParameters;
71    }
72  }
73}
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