[3360] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[9456] | 3 | * Copyright (C) 2002-2013 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[3360] | 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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[3338] | 23 | using System.Collections.Generic;
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| 24 | using System.Linq;
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[4068] | 25 | using System.Text;
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| 26 | using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
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[3338] | 27 | using Microsoft.VisualStudio.TestTools.UnitTesting;
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| 28 |
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[7915] | 29 | namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding_34.Tests {
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[3338] | 30 | public static class Util {
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[5549] | 31 | public static string GetSizeDistributionString(IList<ISymbolicExpressionTree> trees, int maxTreeLength, int binSize) {
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| 32 | int[] histogram = new int[maxTreeLength / binSize];
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[3338] | 33 | for (int i = 0; i < trees.Count; i++) {
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[5549] | 34 | int binIndex = Math.Min(histogram.Length - 1, trees[i].Length / binSize);
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[3360] | 35 | histogram[binIndex]++;
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[3338] | 36 | }
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| 37 | StringBuilder strBuilder = new StringBuilder();
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[3360] | 38 | for (int i = 0; i < histogram.Length - 1; i++) {
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[3338] | 39 | strBuilder.Append(Environment.NewLine);
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| 40 | strBuilder.Append("< "); strBuilder.Append((i + 1) * binSize);
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| 41 | strBuilder.Append(": "); strBuilder.AppendFormat("{0:#0.00%}", histogram[i] / (double)trees.Count);
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| 42 | }
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[3360] | 43 | strBuilder.Append(Environment.NewLine);
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| 44 | strBuilder.Append(">= "); strBuilder.Append(histogram.Length * binSize);
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| 45 | strBuilder.Append(": "); strBuilder.AppendFormat("{0:#0.00%}", histogram[histogram.Length - 1] / (double)trees.Count);
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| 46 |
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[3338] | 47 | return "Size distribution: " + strBuilder;
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| 48 | }
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| 49 |
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[5549] | 50 | public static string GetFunctionDistributionString(IList<ISymbolicExpressionTree> trees) {
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[3338] | 51 | Dictionary<string, int> occurances = new Dictionary<string, int>();
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| 52 | double n = 0.0;
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| 53 | for (int i = 0; i < trees.Count; i++) {
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| 54 | foreach (var node in trees[i].IterateNodesPrefix()) {
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[5733] | 55 | if (node.Subtrees.Count() > 0) {
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[3338] | 56 | if (!occurances.ContainsKey(node.Symbol.Name))
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| 57 | occurances[node.Symbol.Name] = 0;
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| 58 | occurances[node.Symbol.Name]++;
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| 59 | n++;
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| 60 | }
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| 61 | }
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| 62 | }
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| 63 | StringBuilder strBuilder = new StringBuilder();
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| 64 | foreach (var function in occurances.Keys) {
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| 65 | strBuilder.Append(Environment.NewLine);
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| 66 | strBuilder.Append(function); strBuilder.Append(": ");
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| 67 | strBuilder.AppendFormat("{0:#0.00%}", occurances[function] / n);
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| 68 | }
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| 69 | return "Function distribution: " + strBuilder;
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| 70 | }
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| 71 |
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[5733] | 72 | public static string GetNumberOfSubtreesDistributionString(IList<ISymbolicExpressionTree> trees) {
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[3338] | 73 | Dictionary<int, int> occurances = new Dictionary<int, int>();
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| 74 | double n = 0.0;
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| 75 | for (int i = 0; i < trees.Count; i++) {
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| 76 | foreach (var node in trees[i].IterateNodesPrefix()) {
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[5733] | 77 | if (!occurances.ContainsKey(node.Subtrees.Count()))
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| 78 | occurances[node.Subtrees.Count()] = 0;
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| 79 | occurances[node.Subtrees.Count()]++;
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[3338] | 80 | n++;
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| 81 | }
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| 82 | }
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| 83 | StringBuilder strBuilder = new StringBuilder();
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| 84 | foreach (var arity in occurances.Keys) {
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| 85 | strBuilder.Append(Environment.NewLine);
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| 86 | strBuilder.Append(arity); strBuilder.Append(": ");
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| 87 | strBuilder.AppendFormat("{0:#0.00%}", occurances[arity] / n);
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| 88 | }
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| 89 | return "Distribution of function arities: " + strBuilder;
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| 90 | }
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| 91 |
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| 92 |
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[5549] | 93 | public static string GetTerminalDistributionString(IList<ISymbolicExpressionTree> trees) {
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[3338] | 94 | Dictionary<string, int> occurances = new Dictionary<string, int>();
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| 95 | double n = 0.0;
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| 96 | for (int i = 0; i < trees.Count; i++) {
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| 97 | foreach (var node in trees[i].IterateNodesPrefix()) {
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[5733] | 98 | if (node.Subtrees.Count() == 0) {
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[3338] | 99 | if (!occurances.ContainsKey(node.Symbol.Name))
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| 100 | occurances[node.Symbol.Name] = 0;
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| 101 | occurances[node.Symbol.Name]++;
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| 102 | n++;
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| 103 | }
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| 104 | }
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| 105 | }
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| 106 | StringBuilder strBuilder = new StringBuilder();
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| 107 | foreach (var function in occurances.Keys) {
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| 108 | strBuilder.Append(Environment.NewLine);
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| 109 | strBuilder.Append(function); strBuilder.Append(": ");
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| 110 | strBuilder.AppendFormat("{0:#0.00%}", occurances[function] / n);
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| 111 | }
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| 112 | return "Terminal distribution: " + strBuilder;
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| 113 | }
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[3360] | 114 |
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[5549] | 115 | public static void IsValid(ISymbolicExpressionTree tree) {
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| 116 | int reportedSize = tree.Length;
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[4524] | 117 | int actualSize = tree.IterateNodesPostfix().Count();
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| 118 | Assert.AreEqual(actualSize, reportedSize);
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| 119 |
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[5733] | 120 | foreach (var defunTreeNode in tree.Root.Subtrees.OfType<DefunTreeNode>()) {
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[4106] | 121 | int arity = defunTreeNode.NumberOfArguments;
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[5686] | 122 |
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| 123 | foreach (var argTreenode in defunTreeNode.IterateNodesPrefix().OfType<ArgumentTreeNode>()) {
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[6803] | 124 | Assert.IsTrue(argTreenode.SubtreeCount == 0);
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[5686] | 125 | Assert.IsTrue(((Argument)argTreenode.Symbol).ArgumentIndex < arity);
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| 126 | }
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| 127 |
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| 128 | foreach (var argSymbol in Enumerable.Range(0, defunTreeNode.NumberOfArguments).Select(x => new Argument(x))) {
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| 129 | Assert.IsTrue(defunTreeNode.Grammar.ContainsSymbol(argSymbol));
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| 130 | Assert.IsTrue(defunTreeNode.Grammar.GetMaximumSubtreeCount(argSymbol) == 0);
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| 131 | Assert.IsTrue(defunTreeNode.Grammar.GetMinimumSubtreeCount(argSymbol) == 0);
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| 132 | }
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| 133 |
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[4106] | 134 | var invoke = new InvokeFunction(defunTreeNode.FunctionName);
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[5733] | 135 | foreach (var otherRootNode in tree.Root.Subtrees) {
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[4106] | 136 | if (otherRootNode.Grammar.ContainsSymbol(invoke)) {
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[5686] | 137 | Assert.IsTrue(otherRootNode.Grammar.GetMinimumSubtreeCount(invoke) == arity);
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| 138 | Assert.IsTrue(otherRootNode.Grammar.GetMaximumSubtreeCount(invoke) == arity);
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[6918] | 139 | Assert.IsFalse(otherRootNode.Grammar.IsAllowedChildSymbol(invoke, invoke));
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| 140 | for (int i = 0; i < arity; i++) {
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| 141 | Assert.IsFalse(otherRootNode.Grammar.IsAllowedChildSymbol(invoke, invoke, i));
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| 142 | }
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[4106] | 143 | }
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| 144 | }
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[5686] | 145 |
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[4106] | 146 | }
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[5792] | 147 |
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[5733] | 148 | foreach (var subtree in tree.Root.Subtrees) {
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[5411] | 149 | Assert.AreNotSame(subtree.Grammar, tree.Root.Grammar);
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[5686] | 150 | IsValid(subtree.Grammar);
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| 151 | }
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| 152 |
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| 153 | IsValid(tree.Root.Grammar);
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[3360] | 154 | IsValid(tree.Root);
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| 155 | }
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| 156 |
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[5686] | 157 | public static void IsValid(ISymbolicExpressionTreeGrammar grammar) {
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| 158 | Assert.IsTrue(grammar.Symbols.Count() == grammar.Symbols.Distinct().Count());
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[6814] | 159 | foreach (ISymbol symbol in grammar.AllowedSymbols) {
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[5686] | 160 | Assert.IsTrue(grammar.GetAllowedChildSymbols(symbol).Count() == grammar.GetAllowedChildSymbols(symbol).Distinct().Count());
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| 161 | for (int i = 0; i < grammar.GetMaximumSubtreeCount(symbol); i++) {
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| 162 | Assert.IsTrue(grammar.GetAllowedChildSymbols(symbol, i).Count() == grammar.GetAllowedChildSymbols(symbol, i).Distinct().Count());
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| 163 | }
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| 164 | }
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[5792] | 165 |
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| 166 | foreach (var symbol in grammar.ModifyableSymbols) {
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[7252] | 167 | //check if every symbol has at least one allowed child
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[5792] | 168 | for (int i = 0; i < grammar.GetMaximumSubtreeCount(symbol); i++)
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| 169 | Assert.IsTrue(grammar.GetAllowedChildSymbols(symbol, i).Any());
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| 170 | }
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[5686] | 171 | }
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| 172 |
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[5549] | 173 | public static void IsValid(ISymbolicExpressionTreeNode treeNode) {
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[4106] | 174 | var matchingSymbol = (from symb in treeNode.Grammar.Symbols
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| 175 | where symb.Name == treeNode.Symbol.Name
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| 176 | select symb).SingleOrDefault();
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[5733] | 177 | Assert.IsTrue(treeNode.Subtrees.Count() >= treeNode.Grammar.GetMinimumSubtreeCount(matchingSymbol));
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| 178 | Assert.IsTrue(treeNode.Subtrees.Count() <= treeNode.Grammar.GetMaximumSubtreeCount(matchingSymbol));
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[5411] | 179 | Assert.AreNotEqual(0.0, matchingSymbol.InitialFrequency); // check that no deactivated symbols occur in the tree
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[5733] | 180 | for (int i = 0; i < treeNode.Subtrees.Count(); i++) {
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| 181 | Assert.IsTrue(treeNode.Grammar.GetAllowedChildSymbols(treeNode.Symbol, i).Select(x => x.Name).Contains(treeNode.GetSubtree(i).Symbol.Name));
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| 182 | IsValid(treeNode.GetSubtree(i));
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[3360] | 183 | }
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| 184 | }
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[3338] | 185 | }
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| 186 | }
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