Add DFS

jameslieu · Dec 9, 2021 · 615c9c1 · 615c9c1
1 parent 688580a
commit 615c9c1
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diff --git a/DepthFirstSearch/DepthFirstSearch.Tests/DFSTests.cs b/DepthFirstSearch/DepthFirstSearch.Tests/DFSTests.cs
@@ -0,0 +1,38 @@
+using NUnit.Framework;
+using System.Collections.Generic;
+
+namespace DepthFirstSearch.Tests
+{
+    public class DFSTests
+    {
+        [Test]
+        public void Test_Search()
+        {
+            // arrange
+            var root = new Node(0);
+            var one = new Node(1);
+            var two = new Node(2);
+            var three = new Node(3);
+            var four = new Node(4);
+            var five = new Node(5);
+
+            root.Children.Add(one);
+            root.Children.Add(four);
+            root.Children.Add(five);
+
+            one.Children.Add(four);
+            one.Children.Add(three);
+
+            three.Children.Add(four);
+            three.Children.Add(two);
+
+            two.Children.Add(one);
+            // act
+            var actual = new DFS().Search(root, new List<int>());
+
+            // assert
+            var expected = new List<int> { 0, 1, 4, 3, 2, 5 };
+            Assert.That(actual, Is.EqualTo(expected));
+        }
+    }
+}
diff --git a/DepthFirstSearch/DepthFirstSearch.Tests/DepthFirstSearch.Tests.csproj b/DepthFirstSearch/DepthFirstSearch.Tests/DepthFirstSearch.Tests.csproj
@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.11.0" />
+    <PackageReference Include="NUnit" Version="3.13.2" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.0.0" />
+    <PackageReference Include="coverlet.collector" Version="3.1.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\DepthFirstSearch\DepthFirstSearch.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/DepthFirstSearch/DepthFirstSearch.sln b/DepthFirstSearch/DepthFirstSearch.sln
@@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31919.166
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DepthFirstSearch", "DepthFirstSearch\DepthFirstSearch.csproj", "{852EDCD0-DFD7-4397-B3E2-53A8E3C1D8AF}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DepthFirstSearch.Tests", "DepthFirstSearch.Tests\DepthFirstSearch.Tests.csproj", "{98DC9FB0-1D20-473A-B544-EF6A036A04B9}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{852EDCD0-DFD7-4397-B3E2-53A8E3C1D8AF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{852EDCD0-DFD7-4397-B3E2-53A8E3C1D8AF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{852EDCD0-DFD7-4397-B3E2-53A8E3C1D8AF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{852EDCD0-DFD7-4397-B3E2-53A8E3C1D8AF}.Release|Any CPU.Build.0 = Release|Any CPU
+		{98DC9FB0-1D20-473A-B544-EF6A036A04B9}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{98DC9FB0-1D20-473A-B544-EF6A036A04B9}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{98DC9FB0-1D20-473A-B544-EF6A036A04B9}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{98DC9FB0-1D20-473A-B544-EF6A036A04B9}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {68942BB8-96CA-43E2-96E7-6298A59ADDB0}
+	EndGlobalSection
+EndGlobal
diff --git a/DepthFirstSearch/DepthFirstSearch/DFS.cs b/DepthFirstSearch/DepthFirstSearch/DFS.cs
@@ -0,0 +1,41 @@
+namespace DepthFirstSearch
+{
+    public class Node
+    {
+        public bool Visited { get; set; }
+        public List<Node> Children { get; set; }
+        public int Value { get; set; }
+
+        public Node(int value)
+        {
+            Children = new List<Node>();
+            Value = value;
+            Visited = false;
+        }
+
+        public void Visit()
+        {
+            Visited = true;
+        }
+    }
+    public class DFS
+    {
+        public List<int> Search(Node root, List<int> result)
+        {
+            if (root == null)
+            {
+                return result;
+            }
+            root.Visit();
+            result.Add(root.Value);
+            for (int i = 0; i < root.Children.Count; i++)
+            {
+                if (!root.Children[i].Visited)
+                {
+                    Search(root.Children[i], result);
+                }
+            }
+            return result;
+        }
+    }
+}
diff --git a/DepthFirstSearch/DepthFirstSearch/DepthFirstSearch.csproj b/DepthFirstSearch/DepthFirstSearch/DepthFirstSearch.csproj
@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>