1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2011 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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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.Common;
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25 | using HeuristicLab.Core;
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26 | using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
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27 | using HeuristicLab.Optimization;
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28 | using HeuristicLab.Problems.DataAnalysis.Regression.Symbolic;
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29 | using HeuristicLab.Problems.DataAnalysis.Symbolic;
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30 | using Microsoft.VisualStudio.TestTools.UnitTesting;
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31 | namespace HeuristicLab.Problems.DataAnalysis.Tests {
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32 |
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33 | [TestClass()]
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34 | public class SymbolicSimplifierTest {
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35 | [DeploymentItem(@"RegressionSolution01.hl")]
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36 | [DeploymentItem(@"RegressionSolution02.hl")]
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37 | [DeploymentItem(@"RegressionSolution03.hl")]
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38 | [DeploymentItem(@"RegressionSolution04.hl")]
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39 | [DeploymentItem(@"RegressionSolution05.hl")]
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40 | [DeploymentItem(@"RegressionSolution06.hl")]
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41 | [TestMethod]
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42 | public void SimplifyRegressionSolutionsTest() {
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43 | ContentManager.Initialize(new PersistenceContentManager());
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44 |
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45 | {
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46 | SymbolicRegressionSolution solution = LoadSolution("RegressionSolution01.hl");
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47 | SymbolicRegressionSolution simplifiedSolution = SimplifySolution(solution);
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48 | AssertEqualEnumerations(solution.EstimatedValues, simplifiedSolution.EstimatedValues);
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49 | }
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50 | {
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51 | SymbolicRegressionSolution solution = LoadSolution("RegressionSolution02.hl");
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52 | SymbolicRegressionSolution simplifiedSolution = SimplifySolution(solution);
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53 | AssertEqualEnumerations(solution.EstimatedValues, simplifiedSolution.EstimatedValues);
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54 | }
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55 | {
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56 | SymbolicRegressionSolution solution = LoadSolution("RegressionSolution03.hl");
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57 | SymbolicRegressionSolution simplifiedSolution = SimplifySolution(solution);
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58 | AssertEqualEnumerations(solution.EstimatedValues, simplifiedSolution.EstimatedValues);
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59 | }
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60 | {
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61 | SymbolicRegressionSolution solution = LoadSolution("RegressionSolution04.hl");
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62 | SymbolicRegressionSolution simplifiedSolution = SimplifySolution(solution);
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63 | AssertEqualEnumerations(solution.EstimatedValues, simplifiedSolution.EstimatedValues);
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64 | }
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65 | {
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66 | SymbolicRegressionSolution solution = LoadSolution("RegressionSolution05.hl");
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67 | SymbolicRegressionSolution simplifiedSolution = SimplifySolution(solution);
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68 | AssertEqualEnumerations(solution.EstimatedValues, simplifiedSolution.EstimatedValues);
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69 | }
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70 | {
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71 | SymbolicRegressionSolution solution = LoadSolution("RegressionSolution06.hl");
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72 | SymbolicRegressionSolution simplifiedSolution = SimplifySolution(solution);
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73 | AssertEqualEnumerations(solution.EstimatedValues, simplifiedSolution.EstimatedValues);
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74 | }
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75 | }
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76 |
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77 | private SymbolicRegressionSolution LoadSolution(string fileName) {
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78 | var doc = ContentManager.Load(fileName);
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79 | Result result = doc as Result;
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80 | if (result != null) {
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81 | return (SymbolicRegressionSolution)result.Value;
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82 | }
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83 | SymbolicRegressionSolution solution = doc as SymbolicRegressionSolution;
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84 | if (solution != null) {
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85 | return solution;
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86 | }
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87 | Assert.Fail("Cannot load file " + fileName);
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88 | throw new AssertFailedException();
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89 | }
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90 |
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91 | private SymbolicRegressionSolution SimplifySolution(SymbolicRegressionSolution original) {
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92 | SymbolicSimplifier simplifier = new SymbolicSimplifier();
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93 | SymbolicExpressionTree simplifiedTree = simplifier.Simplify(original.Model.SymbolicExpressionTree);
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94 | SymbolicRegressionModel simplifiedModel = new SymbolicRegressionModel(original.Model.Interpreter, simplifiedTree);
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95 | return new SymbolicRegressionSolution(original.ProblemData, simplifiedModel, original.LowerEstimationLimit, original.UpperEstimationLimit);
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96 | }
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97 |
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98 | private void AssertEqualEnumerations(IEnumerable<double> expected, IEnumerable<double> actual) {
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99 | var expectedEnumerator = expected.GetEnumerator();
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100 | var actualEnumerator = actual.GetEnumerator();
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101 | while (expectedEnumerator.MoveNext() & actualEnumerator.MoveNext()) {
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102 | Assert.AreEqual(expectedEnumerator.Current, actualEnumerator.Current, Math.Abs(1E-6 * expectedEnumerator.Current));
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103 | }
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104 | if (expectedEnumerator.MoveNext() | actualEnumerator.MoveNext())
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105 | Assert.Fail("Number of elements in enumerations do not match");
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106 | }
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107 | }
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108 | }
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