[4189] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[15584] | 3 | * Copyright (C) 2002-2018 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[4189] | 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using System;
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| 23 | using System.Collections.Generic;
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| 24 | using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
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| 25 | using HeuristicLab.Random;
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| 26 | using Microsoft.VisualStudio.TestTools.UnitTesting;
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| 27 |
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[9885] | 28 | namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.Tests {
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[4189] | 29 | [TestClass]
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| 30 | public class ChangeNodeTypeManipulationTest {
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| 31 | private const int POPULATION_SIZE = 1000;
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[5549] | 32 | private const int MAX_TREE_LENGTH = 100;
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| 33 | private const int MAX_TREE_DEPTH = 10;
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[4189] | 34 |
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[9885] | 35 | [TestMethod]
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| 36 | [TestCategory("Encodings.SymbolicExpressionTree")]
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| 37 | [TestProperty("Time", "medium")]
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[4189] | 38 | public void ChangeNodeTypeManipulationDistributionsTest() {
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[5549] | 39 | SymbolicExpressionTreeStringFormatter formatter = new SymbolicExpressionTreeStringFormatter();
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| 40 | var trees = new List<ISymbolicExpressionTree>();
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[4189] | 41 | var grammar = Grammars.CreateArithmeticAndAdfGrammar();
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[5367] | 42 | var random = new MersenneTwister(31415);
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[5567] | 43 | int failedEvents = 0;
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[4189] | 44 | for (int i = 0; i < POPULATION_SIZE; i++) {
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[5686] | 45 | var tree = ProbabilisticTreeCreator.Create(random, grammar, MAX_TREE_LENGTH, MAX_TREE_DEPTH);
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[5549] | 46 | string originalTree = formatter.Format(tree);
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| 47 | ChangeNodeTypeManipulation.ChangeNodeType(random, tree);
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| 48 | string manipulatedTree = formatter.Format(tree);
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[5567] | 49 | if (originalTree == manipulatedTree) failedEvents++;
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[4189] | 50 | Util.IsValid(tree);
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| 51 | trees.Add(tree);
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| 52 | }
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[5367] | 53 | Console.WriteLine("ChangeNodeTypeManipulation: " + Environment.NewLine +
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[5567] | 54 | "Failed events: " + failedEvents * 100.0 / POPULATION_SIZE + " %" + Environment.NewLine +
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[4189] | 55 | Util.GetSizeDistributionString(trees, 105, 5) + Environment.NewLine +
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| 56 | Util.GetFunctionDistributionString(trees) + Environment.NewLine +
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[5733] | 57 | Util.GetNumberOfSubtreesDistributionString(trees) + Environment.NewLine +
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[4189] | 58 | Util.GetTerminalDistributionString(trees) + Environment.NewLine
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| 59 | );
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[5567] | 60 | Assert.IsTrue(failedEvents * 100.0 / POPULATION_SIZE < 5.0); // only max 5% failed mutations are allowed
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[4189] | 61 | }
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| 62 | }
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| 63 | }
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