1 | using System;
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2 | using System.IO;
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3 | using Microsoft.VisualStudio.TestTools.UnitTesting;
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4 | using HeuristicLab.Problems.BinPacking3D;
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5 | using HeuristicLab.Problems.BinPacking3D.Instances;
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6 | using System.Collections.Generic;
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7 | using System.Linq;
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8 | using HeuristicLab.Core;
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9 |
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10 | namespace HeuristicLab.Problems.BinPacking._3D.Instances.Tests {
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11 | [TestClass]
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12 | public class RandomInstanceProviderTest {
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13 |
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14 | private struct Dimension {
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15 | public int Id { get; set; }
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16 | public int Width { get; set; }
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17 | public int Height { get; set; }
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18 | public int Depth { get; set; }
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19 | }
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20 |
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21 | #region TestRandomInstanceProvider
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22 |
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23 |
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24 | /// <summary>
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25 | /// Tests if the generated random instance equals to the references generated by david pisinger
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26 | /// http://www.diku.dk/~pisinger/new3dbpp/test3dbpp.c
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27 | /// </summary>
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28 | [TestMethod]
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29 | [TestCategory("Problems.BinPacking.3D")]
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30 | [TestProperty("Time", "long")]
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31 | public void TestRandomInstanceProvider() {
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32 |
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33 | var referenceItemLists = ReadReferenceItemLists();
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34 | TestRandomInstanceProviderByClass(new RandomInstanceClass1Provider(), referenceItemLists);
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35 | TestRandomInstanceProviderByClass(new RandomInstanceClass2Provider(), referenceItemLists);
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36 | TestRandomInstanceProviderByClass(new RandomInstanceClass3Provider(), referenceItemLists);
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37 | TestRandomInstanceProviderByClass(new RandomInstanceClass4Provider(), referenceItemLists);
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38 | TestRandomInstanceProviderByClass(new RandomInstanceClass5Provider(), referenceItemLists);
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39 | TestRandomInstanceProviderByClass(new RandomInstanceClass6Provider(), referenceItemLists);
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40 | TestRandomInstanceProviderByClass(new RandomInstanceClass7Provider(), referenceItemLists);
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41 | TestRandomInstanceProviderByClass(new RandomInstanceClass8Provider(), referenceItemLists);
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42 |
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43 | }
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44 |
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45 | private IDictionary<string, List<Dimension>> ReadReferenceItemLists() {
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46 | var itemList = new Dictionary<string, List<Dimension>>();
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47 | string path = @".\..\HeuristicLab.Tests\HeuristicLab.Problems.Bin-Packing-3.3\TestInstances\ReferenceInstances";
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48 |
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49 | string[] files = Directory.GetFiles(path);
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50 | foreach (string filePath in files) {
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51 | string key = Path.GetFileNameWithoutExtension(filePath);
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52 |
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53 | using (StreamReader reader = new StreamReader(filePath)) {
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54 | int lineNumber = 1;
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55 | List<Dimension> dimensionList = new List<Dimension>();
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56 | while (!reader.EndOfStream) {
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57 | string line = reader.ReadLine();
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58 | if (lineNumber > 2) {
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59 | string[] lineValues = line.Split('\t');
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60 | int id;
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61 | int depth;
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62 | int width;
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63 | int height;
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64 | Int32.TryParse(lineValues[0], out id);
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65 | Int32.TryParse(lineValues[1], out depth);
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66 | Int32.TryParse(lineValues[2], out width);
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67 | Int32.TryParse(lineValues[3], out height);
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68 | dimensionList.Add(new Dimension() {
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69 | Id = id,
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70 | Depth = depth,
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71 | Width = width,
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72 | Height = height
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73 | });
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74 | }
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75 | lineNumber++;
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76 | }
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77 | itemList.Add(key, dimensionList);
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78 | }
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79 | }
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80 | return itemList;
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81 | }
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82 |
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83 | private void TestRandomInstanceProviderByClass(RandomInstanceProvider randomInstanceProvider, IDictionary<string, List<Dimension>> referenceItems) {
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84 |
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85 | var dataDescriptors = randomInstanceProvider.GetDataDescriptors();
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86 | foreach (var dataDescriptor in dataDescriptors) {
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87 | List<Dimension> testItemDimensions = null;
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88 | if (referenceItems.TryGetValue(dataDescriptor.Name, out testItemDimensions)) {
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89 | var packingItems = randomInstanceProvider.LoadData(dataDescriptor).Items;
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90 | Assert.IsNotNull(packingItems);
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91 | Assert.AreEqual(testItemDimensions.Count, packingItems.Length);
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92 | for (int i = 0; i < packingItems.Length; i++) {
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93 | Assert.AreEqual(testItemDimensions[i].Width, packingItems[i].Width);
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94 | Assert.AreEqual(testItemDimensions[i].Height, packingItems[i].Height);
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95 | Assert.AreEqual(testItemDimensions[i].Depth, packingItems[i].Depth);
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96 | }
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97 | }
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98 | }
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99 | }
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100 | #endregion
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101 |
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102 | #region TestExtremePointAlgorithm
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103 |
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104 | /// <summary>
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105 | /// Constants for testing the algorithm
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106 | /// The test parameters are defined in the paper
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107 | /// </summary>
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108 | private const int NUMBER_OF_TEST_INSTANCES = 10;
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109 | private static readonly int[] TEST_CLASSES = { 1, 2 };
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110 | private static readonly int[] NUMBER_OF_TEST_ITEMS = { 50, 100, 150, 200 };
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111 |
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112 | [TestMethod]
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113 | [TestCategory("Problems.BinPacking.3D")]
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114 | [TestProperty("Time", "long")]
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115 | public void TestExtremePointAlgorithmClass1() {
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116 | TestExtremePointAlgorithm(new RandomInstanceClass1Provider(), 1);
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117 | }
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118 |
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119 | [TestMethod]
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120 | [TestCategory("Problems.BinPacking.3D")]
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121 | [TestProperty("Time", "long")]
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122 | public void TestExtremePointAlgorithmClass2() {
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123 | TestExtremePointAlgorithm(new RandomInstanceClass2Provider(), 2);
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124 | }
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125 |
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126 | [TestMethod]
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127 | [TestCategory("Problems.BinPacking.3D")]
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128 | [TestProperty("Time", "long")]
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129 | public void TestExtremePointAlgorithmClass3() {
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130 | TestExtremePointAlgorithm(new RandomInstanceClass3Provider(), 3);
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131 | }
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132 |
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133 | [TestMethod]
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134 | [TestCategory("Problems.BinPacking.3D")]
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135 | [TestProperty("Time", "long")]
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136 | public void TestExtremePointAlgorithmClass4() {
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137 | TestExtremePointAlgorithm(new RandomInstanceClass4Provider(), 4);
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138 | }
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139 |
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140 | [TestMethod]
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141 | [TestCategory("Problems.BinPacking.3D")]
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142 | [TestProperty("Time", "long")]
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143 | public void TestExtremePointAlgorithmClass5() {
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144 | TestExtremePointAlgorithm(new RandomInstanceClass5Provider(), 5);
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145 | }
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146 |
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147 | [TestMethod]
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148 | [TestCategory("Problems.BinPacking.3D")]
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149 | [TestProperty("Time", "long")]
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150 | public void TestExtremePointAlgorithmClass6() {
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151 | TestExtremePointAlgorithm(new RandomInstanceClass6Provider(), 6);
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152 | }
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153 |
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154 | [TestMethod]
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155 | [TestCategory("Problems.BinPacking.3D")]
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156 | [TestProperty("Time", "long")]
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157 | public void TestExtremePointAlgorithmClass7() {
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158 | TestExtremePointAlgorithm(new RandomInstanceClass7Provider(), 7);
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159 | }
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160 |
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161 | [TestMethod]
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162 | [TestCategory("Problems.BinPacking.3D")]
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163 | [TestProperty("Time", "long")]
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164 | public void TestExtremePointAlgorithmClass8() {
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165 | TestExtremePointAlgorithm(new RandomInstanceClass8Provider(), 8);
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166 | }
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167 |
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168 | private void TestExtremePointAlgorithm(RandomInstanceProvider randomInstanceProvider, int @class) {
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169 | foreach (SortingMethod sortingMethod in Enum.GetValues(typeof(SortingMethod))) {
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170 | //foreach (FittingMethod fittingMethod in Enum.GetValues(typeof(FittingMethod))) {
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171 | FittingMethod fittingMethod = FittingMethod.FirstFit;
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172 | TestExtremePointAlgorithmByParameters(randomInstanceProvider, @class, sortingMethod, fittingMethod);
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173 | //}
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174 | }
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175 | }
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176 |
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177 | private void TestExtremePointAlgorithmByParameters(RandomInstanceProvider randomInstanceProvider, int @class, SortingMethod sortingMethod, FittingMethod fittingMethod) {
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178 | var dataDescriptors = randomInstanceProvider.GetDataDescriptors();
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179 | var referenceValues = GetReferenceAlgorithmValues();
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180 | foreach (var numItems in NUMBER_OF_TEST_ITEMS) {
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181 | int sumNumberOfBins = 0;
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182 | for (int instance = 1; instance <= NUMBER_OF_TEST_INSTANCES; instance++) {
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183 | string name = string.Format("n={0}-id={1:00} (class={2})", numItems, instance, @class);
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184 | var selectedDataDescriptor = dataDescriptors.Where(dataDescriptor => dataDescriptor.Name == name);
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185 | Assert.IsNotNull(selectedDataDescriptor?.First());
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186 | var packingData = randomInstanceProvider.LoadData(selectedDataDescriptor.First());
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187 |
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188 | ExtremePointAlgorithm algorithm = new ExtremePointAlgorithm();
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189 | algorithm.SortingMethodParameter.Value.Value = sortingMethod;
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190 | algorithm.FittingMethodParameter.Value.Value = fittingMethod;
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191 | algorithm.Problem.Load(packingData);
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192 |
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193 | algorithm.Start();
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194 |
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195 | PackingPlan<BinPacking3D.PackingPosition, PackingShape, PackingItem> bestPackingPlan = null;
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196 | foreach (Optimization.IResult result in algorithm.Results) {
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197 | if (result.Name == "Best Solution") {
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198 | bestPackingPlan = (PackingPlan<BinPacking3D.PackingPosition, PackingShape, PackingItem>)result.Value;
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199 | break;
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200 | }
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201 | }
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202 |
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203 | sumNumberOfBins += bestPackingPlan.NrOfBins;
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204 | }
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205 |
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206 | double referenceValue = 0.0;
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207 |
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208 | if (referenceValues.TryGetValue(new Tuple<int, int, SortingMethod>(@class, numItems, sortingMethod), out referenceValue)) {
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209 | Console.WriteLine($"{numItems}-{@class}-{sortingMethod}: \tReference: {referenceValue} \tImplementation: {(double)sumNumberOfBins / (double)NUMBER_OF_TEST_INSTANCES} \t{(referenceValue - ((double)sumNumberOfBins / (double)NUMBER_OF_TEST_INSTANCES)):F2}");
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210 | Assert.AreEqual(referenceValue, (double)sumNumberOfBins / (double)NUMBER_OF_TEST_INSTANCES, 20.0);
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211 | }
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212 | }
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213 | }
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214 |
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215 |
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216 | /// <summary>
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217 | /// Returns a dictionary which contains the reference values from table 2 given by the paper https://www.cirrelt.ca/DocumentsTravail/CIRRELT-2007-41.pdf
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218 | /// Dictionary<Tuple<int, int, SortingMethod>, double> -> Dictionary<Tuple<@class, number of items, SortingMethod>, value>
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219 | /// </summary>
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220 | /// <returns></returns>
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221 | private Dictionary<Tuple<int, int, SortingMethod>, double> GetReferenceAlgorithmValues() {
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222 | Dictionary<Tuple<int, int, SortingMethod>, double> referenceValues = new Dictionary<Tuple<int, int, SortingMethod>, double>();
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223 |
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224 | AddToReferenceAlgorithmValuesDict(referenceValues, 1, SortingMethod.Given, new double[] { 14.6, 29.2, 40.1, 55.9});
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225 | AddToReferenceAlgorithmValuesDict(referenceValues, 1, SortingMethod.HeightVolume, new double[] { 15, 29.2, 39.9, 55.6 });
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226 | AddToReferenceAlgorithmValuesDict(referenceValues, 1, SortingMethod.VolumeHeight, new double[] { 14.4, 29.5, 40.3, 55.7 });
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227 | AddToReferenceAlgorithmValuesDict(referenceValues, 1, SortingMethod.AreaHeight, new double[] { 14.4, 28.3, 39.2, 53.2 });
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228 | AddToReferenceAlgorithmValuesDict(referenceValues, 1, SortingMethod.HeightArea, new double[] { 15, 29, 39.8, 55.1});
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229 | AddToReferenceAlgorithmValuesDict(referenceValues, 1, SortingMethod.ClusteredAreaHeight, new double[] { 14, 27.9, 38.1, 53 });
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230 | AddToReferenceAlgorithmValuesDict(referenceValues, 1, SortingMethod.ClusteredHeightArea, new double[] { 13.8, 27.4, 37.7, 52.3 });
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231 |
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232 | AddToReferenceAlgorithmValuesDict(referenceValues, 4, SortingMethod.Given, new double[] { 29.7, 60.2, 88.5, 119.9 });
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233 | AddToReferenceAlgorithmValuesDict(referenceValues, 4, SortingMethod.HeightVolume, new double[] { 30.1, 59.6, 88.3, 120.1 });
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234 | AddToReferenceAlgorithmValuesDict(referenceValues, 4, SortingMethod.VolumeHeight, new double[] { 29.9, 60.4, 88.6, 119.6 });
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235 | AddToReferenceAlgorithmValuesDict(referenceValues, 4, SortingMethod.AreaHeight, new double[] { 30, 59.7, 88.4, 120.3 });
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236 | AddToReferenceAlgorithmValuesDict(referenceValues, 4, SortingMethod.HeightArea, new double[] { 30, 59.6, 88.3, 120 });
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237 | AddToReferenceAlgorithmValuesDict(referenceValues, 4, SortingMethod.ClusteredAreaHeight, new double[] { 29.5, 59, 86.9, 119 });
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238 | AddToReferenceAlgorithmValuesDict(referenceValues, 4, SortingMethod.ClusteredHeightArea, new double[] { 29.5, 59, 86.9, 118.9 });
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239 |
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240 | AddToReferenceAlgorithmValuesDict(referenceValues, 5, SortingMethod.Given, new double[] { 10.1, 18.1, 24.4, 32.5 });
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241 | AddToReferenceAlgorithmValuesDict(referenceValues, 5, SortingMethod.HeightVolume, new double[] { 9, 16.7, 22.9, 30.7});
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242 | AddToReferenceAlgorithmValuesDict(referenceValues, 5, SortingMethod.VolumeHeight, new double[] { 10, 17.8, 24.5, 32.6 });
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243 | AddToReferenceAlgorithmValuesDict(referenceValues, 5, SortingMethod.AreaHeight, new double[] { 9.2, 16.1, 21.9, 29.5 });
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244 | AddToReferenceAlgorithmValuesDict(referenceValues, 5, SortingMethod.HeightArea, new double[] { 9, 16.6, 22.6, 30.5 });
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245 | AddToReferenceAlgorithmValuesDict(referenceValues, 5, SortingMethod.ClusteredAreaHeight, new double[] { 8.5, 15.7, 21, 28.5 });
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246 | AddToReferenceAlgorithmValuesDict(referenceValues, 5, SortingMethod.ClusteredHeightArea, new double[] { 8.4, 15.4, 21.1, 28.2});
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247 |
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248 | AddToReferenceAlgorithmValuesDict(referenceValues, 6, SortingMethod.Given, new double[] { 11.7, 21.7, 33, 44.4});
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249 | AddToReferenceAlgorithmValuesDict(referenceValues, 6, SortingMethod.HeightVolume, new double[] { 10.9, 21.2, 31.8, 41.5 });
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250 | AddToReferenceAlgorithmValuesDict(referenceValues, 6, SortingMethod.VolumeHeight, new double[] { 11.7, 22, 34.2, 44 });
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251 | AddToReferenceAlgorithmValuesDict(referenceValues, 6, SortingMethod.AreaHeight, new double[] { 10.6, 20.2, 30.8, 39.5});
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252 | AddToReferenceAlgorithmValuesDict(referenceValues, 6, SortingMethod.HeightArea, new double[] { 10.9, 20.5, 31, 39.8 });
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253 | AddToReferenceAlgorithmValuesDict(referenceValues, 6, SortingMethod.ClusteredAreaHeight, new double[] { 10.2, 19.6, 29.9, 38.6 });
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254 | AddToReferenceAlgorithmValuesDict(referenceValues, 6, SortingMethod.ClusteredHeightArea, new double[] { 10.1, 19.8, 30.2, 38.8 });
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255 |
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256 | AddToReferenceAlgorithmValuesDict(referenceValues, 7, SortingMethod.Given, new double[] { 9.4, 15.9, 19.3, 30 });
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257 | AddToReferenceAlgorithmValuesDict(referenceValues, 7, SortingMethod.HeightVolume, new double[] { 8.2, 14.6, 19.2, 28.1 });
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258 | AddToReferenceAlgorithmValuesDict(referenceValues, 7, SortingMethod.VolumeHeight, new double[] { 9.3, 15.6, 19.7, 30.2 });
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259 | AddToReferenceAlgorithmValuesDict(referenceValues, 7, SortingMethod.AreaHeight, new double[] { 8.1, 14.1, 18.2, 26.2 });
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260 | AddToReferenceAlgorithmValuesDict(referenceValues, 7, SortingMethod.HeightArea, new double[] { 8.1, 14.1, 18.9, 27,2 });
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261 | AddToReferenceAlgorithmValuesDict(referenceValues, 7, SortingMethod.ClusteredAreaHeight, new double[] { 7.6, 13.4, 16.9, 25 });
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262 | AddToReferenceAlgorithmValuesDict(referenceValues, 7, SortingMethod.ClusteredHeightArea, new double[] { 7.7, 13.3, 16.9, 24.9 });
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263 |
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264 | AddToReferenceAlgorithmValuesDict(referenceValues, 8, SortingMethod.Given, new double[] { 11.6, 22, 28.5, 35.4 });
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265 | AddToReferenceAlgorithmValuesDict(referenceValues, 8, SortingMethod.HeightVolume, new double[] { 10.5, 20.9, 27.4, 33.9 });
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266 | AddToReferenceAlgorithmValuesDict(referenceValues, 8, SortingMethod.VolumeHeight, new double[] { 11.6, 22.1, 28.4, 35.4});
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267 | AddToReferenceAlgorithmValuesDict(referenceValues, 8, SortingMethod.AreaHeight, new double[] { 10.1, 20.3, 26.4, 32.2 });
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268 | AddToReferenceAlgorithmValuesDict(referenceValues, 8, SortingMethod.HeightArea, new double[] { 10.5, 20.8, 37.7, 33.9 });
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269 | AddToReferenceAlgorithmValuesDict(referenceValues, 8, SortingMethod.ClusteredAreaHeight, new double[] { 9.6, 19.4, 25.4, 31.4 });
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270 | AddToReferenceAlgorithmValuesDict(referenceValues, 8, SortingMethod.ClusteredHeightArea, new double[] { 9.5, 19.7, 25.5, 31.5 });
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271 |
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272 | return referenceValues;
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273 | }
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274 |
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275 | private void AddToReferenceAlgorithmValuesDict(Dictionary<Tuple<int, int, SortingMethod>, double> referenceValues, int @class, SortingMethod sortingMethod, double[] values) {
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276 | for (int i = 0; i < values.Length; i++) {
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277 | referenceValues.Add(new Tuple<int, int, SortingMethod>(@class, 50 + (50 * i), sortingMethod), values[i]);
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278 | }
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279 |
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280 | }
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281 |
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282 |
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283 | #endregion
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284 | }
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285 |
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286 | }
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