[14276] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[15583] | 3 | * Copyright (C) 2002-2018 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[14276] | 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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[14277] | 23 | using System.Collections.Generic;
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[14276] | 24 | using HeuristicLab.Common;
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| 25 | using HeuristicLab.IGraph.Wrappers;
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| 26 | using Microsoft.VisualStudio.TestTools.UnitTesting;
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| 27 |
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| 28 | namespace HeuristicLab.Tests {
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| 29 | [TestClass]
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| 30 | public class IGraphWrappersGraphTest {
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| 31 | [TestMethod]
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[14277] | 32 | [TestCategory("ExtLibs")]
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| 33 | [TestCategory("ExtLibs.igraph")]
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| 34 | [TestProperty("Time", "short")]
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| 35 | public void IGraphWrappersGraphConstructionAndFinalizationTest() {
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[15191] | 36 | using (var graph = new Graph(5, new[] {
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[14276] | 37 | Tuple.Create(0, 1),
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| 38 | Tuple.Create(0, 2),
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| 39 | Tuple.Create(1, 2),
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| 40 | Tuple.Create(2, 3),
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| 41 | Tuple.Create(2, 4),
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| 42 | Tuple.Create(3, 4),
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[15191] | 43 | })) {
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| 44 | Assert.AreEqual(5, graph.Vertices);
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| 45 | Assert.IsFalse(graph.IsDirected);
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| 46 | }
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[14276] | 47 |
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[15191] | 48 | using (var graph = new Graph(3, new[] {
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[14276] | 49 | Tuple.Create(0, 1),
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| 50 | Tuple.Create(0, 2),
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| 51 | Tuple.Create(1, 2),
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[15191] | 52 | }, directed: true)) {
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| 53 | Assert.AreEqual(3, graph.Vertices);
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| 54 | Assert.IsTrue(graph.IsDirected);
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| 55 | }
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[14276] | 56 | }
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| 57 |
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| 58 | [TestMethod]
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[14277] | 59 | [TestCategory("ExtLibs")]
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| 60 | [TestCategory("ExtLibs.igraph")]
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| 61 | [TestProperty("Time", "short")]
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| 62 | public void IGraphWrappersGraphDensityTest() {
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[15191] | 63 | using (var graph = new Graph(5, new[] {
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[14276] | 64 | Tuple.Create(0, 1),
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| 65 | Tuple.Create(0, 2),
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| 66 | Tuple.Create(1, 2),
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| 67 | Tuple.Create(2, 3),
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| 68 | Tuple.Create(2, 4),
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| 69 | Tuple.Create(3, 4),
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[15191] | 70 | })) {
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[14276] | 71 |
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[15191] | 72 | var density = graph.Density();
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| 73 | // in un-directed graphs edges count twice
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| 74 | Assert.IsTrue(density.IsAlmost(12 / 20.0));
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| 75 | }
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[14276] | 76 |
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[15191] | 77 | using (var graph = new Graph(5, new[] {
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[14276] | 78 | Tuple.Create(0, 1),
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| 79 | Tuple.Create(0, 2),
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| 80 | Tuple.Create(1, 2),
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| 81 | Tuple.Create(2, 3),
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| 82 | Tuple.Create(2, 4),
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| 83 | Tuple.Create(3, 4),
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[15191] | 84 | }, directed: true)) {
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[14276] | 85 |
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[15191] | 86 | var density = graph.Density();
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| 87 | // in directed graphs edges count twice
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| 88 | Assert.IsTrue(density.IsAlmost(6 / 20.0));
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| 89 | }
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[14276] | 90 | }
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| 91 |
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| 92 | [TestMethod]
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[14277] | 93 | [TestCategory("ExtLibs")]
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| 94 | [TestCategory("ExtLibs.igraph")]
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| 95 | [TestProperty("Time", "short")]
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| 96 | public void IGraphWrappersGraphPageRankTest() {
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[15191] | 97 | using (var graph = new Graph(4, new[] {
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[14276] | 98 | Tuple.Create(0, 1),
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| 99 | Tuple.Create(0, 2),
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| 100 | Tuple.Create(1, 2),
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| 101 | Tuple.Create(2, 0),
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| 102 | Tuple.Create(3, 2),
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[15191] | 103 | }, directed: true)) {
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| 104 | var ranks = graph.PageRank();
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| 105 | Assert.AreEqual(4, ranks.Length);
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| 106 | Assert.AreEqual(0.372, ranks[0], 0.01);
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| 107 | Assert.AreEqual(0.195, ranks[1], 0.01);
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| 108 | Assert.AreEqual(0.394, ranks[2], 0.01);
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| 109 | Assert.AreEqual(0.037, ranks[3], 0.01);
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| 110 | }
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| 111 | using (var graph = new Graph(4, new[] {
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[14276] | 112 | Tuple.Create(0, 1),
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| 113 | Tuple.Create(1, 2),
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| 114 | Tuple.Create(2, 3),
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| 115 | Tuple.Create(3, 0),
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[15191] | 116 | }, directed: true)) {
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| 117 | var ranks = graph.PageRank();
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| 118 | Assert.AreEqual(4, ranks.Length);
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| 119 | Assert.AreEqual(0.250, ranks[0], 0.01);
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| 120 | Assert.AreEqual(0.250, ranks[1], 0.01);
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| 121 | Assert.AreEqual(0.250, ranks[2], 0.01);
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| 122 | Assert.AreEqual(0.250, ranks[3], 0.01);
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| 123 | }
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| 124 | using (var graph = new Graph(4, new[] {
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[14276] | 125 | Tuple.Create(0, 1),
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| 126 | Tuple.Create(0, 2),
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| 127 | Tuple.Create(0, 3),
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| 128 | Tuple.Create(1, 0),
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| 129 | Tuple.Create(2, 0),
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| 130 | Tuple.Create(3, 0),
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[15191] | 131 | }, directed: true)) {
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| 132 | var ranks = graph.PageRank();
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| 133 | Assert.AreEqual(4, ranks.Length);
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| 134 | Assert.AreEqual(0.480, ranks[0], 0.01);
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| 135 | Assert.AreEqual(0.173, ranks[1], 0.01);
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| 136 | Assert.AreEqual(0.173, ranks[2], 0.01);
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| 137 | Assert.AreEqual(0.173, ranks[3], 0.01);
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| 138 | }
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[14276] | 139 | }
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[14277] | 140 |
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| 141 | [TestMethod]
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| 142 | [TestCategory("ExtLibs")]
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| 143 | [TestCategory("ExtLibs.igraph")]
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| 144 | [TestProperty("Time", "short")]
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| 145 | public void IGraphWrappersGraphBreadthFirstWalkTest() {
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[15191] | 146 | using (var graph = new Graph(4, new[] {
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[14277] | 147 | Tuple.Create(0, 1),
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| 148 | Tuple.Create(0, 2),
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| 149 | Tuple.Create(1, 2),
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| 150 | Tuple.Create(2, 0),
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| 151 | Tuple.Create(3, 2),
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[15191] | 152 | }, directed: true)) {
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| 153 | var visited = new HashSet<int>();
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| 154 | BreadthFirstHandler handler = (graph1, currentVertexId, previousVertexId, nextVertexId, rank, distance, tag) => {
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| 155 | visited.Add(currentVertexId);
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| 156 | return false;
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| 157 | };
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| 158 | graph.BreadthFirstWalk(handler, 0, DirectedWalkMode.All, true, null);
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| 159 | Assert.AreEqual(4, visited.Count);
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| 160 | Assert.IsTrue(visited.Contains(0));
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| 161 | Assert.IsTrue(visited.Contains(1));
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| 162 | Assert.IsTrue(visited.Contains(2));
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| 163 | Assert.IsTrue(visited.Contains(3));
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| 164 | }
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[14277] | 165 | }
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| 166 |
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| 167 | [TestMethod]
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| 168 | [TestCategory("ExtLibs")]
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| 169 | [TestCategory("ExtLibs.igraph")]
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| 170 | [TestProperty("Time", "short")]
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| 171 | public void IGraphWrappersGraphDepthFirstWalkTest() {
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[15191] | 172 | using (var graph = new Graph(4, new[] {
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[14277] | 173 | Tuple.Create(0, 1),
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| 174 | Tuple.Create(0, 2),
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| 175 | Tuple.Create(1, 2),
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| 176 | Tuple.Create(2, 0),
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| 177 | Tuple.Create(3, 2),
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[15191] | 178 | }, directed: true)) {
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| 179 | var visited = new HashSet<int>();
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| 180 | DepthFirstHandler handler = (graph1, vertexId, distance, tag) => {
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| 181 | visited.Add(vertexId);
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| 182 | return false;
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| 183 | };
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| 184 | graph.DepthFirstWalk(handler, handler, 0, DirectedWalkMode.All, true, null);
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| 185 | Assert.AreEqual(4, visited.Count);
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| 186 | Assert.IsTrue(visited.Contains(0));
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| 187 | Assert.IsTrue(visited.Contains(1));
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| 188 | Assert.IsTrue(visited.Contains(2));
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| 189 | Assert.IsTrue(visited.Contains(3));
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| 190 | }
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[14277] | 191 | }
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[14276] | 192 | }
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| 193 | }
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