Assignment9+10 multithreading

.gitignore

@@ -1,3 +1,8 @@
+
+# Created by https://www.gitignore.io/api/csharp
+# Edit at https://www.gitignore.io/?templates=csharp
+
+### Csharp ###
 ## Ignore Visual Studio temporary files, build results, and
 ## files generated by popular Visual Studio add-ons.
 ##
@@ -29,7 +34,6 @@ bld/
 [Bb]in/
 [Oo]bj/
 [Ll]og/
-[Ll]ogs/
 
 # Visual Studio 2015/2017 cache/options directory
 .vs/
@@ -127,6 +131,9 @@ _ReSharper*/
 *.[Rr]e[Ss]harper
 *.DotSettings.user
 
+# JustCode is a .NET coding add-in
+.JustCode
+
 # TeamCity is a build add-in
 _TeamCity*
 
@@ -346,8 +353,9 @@ healthchecksdb
 # Backup folder for Package Reference Convert tool in Visual Studio 2017
 MigrationBackup/
 
-# Ionide (cross platform F# VS Code tools) working folder
-.ionide/
+# End of https://www.gitignore.io/api/csharp
+
+# Mac specific files
+.DS_Store
 
-# Live unit testing files.
-*.lutconfig
+*.sqlite

Assignment/Assignment.Tests/Assignment.Tests.csproj → Assignment.Tests/Assignment.Tests.csproj

@@ -1,19 +1,19 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <IsPackable>false</IsPackable>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
-    <PackageReference Include="MSTest.TestAdapter" Version="4.0.2" />
-    <PackageReference Include="MSTest.TestFramework" Version="4.0.2" />
-    <PackageReference Include="coverlet.collector" Version="6.0.4">
-      <PrivateAssets>all</PrivateAssets>
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-    </PackageReference>
-    <ProjectReference Include="..\Assignment\Assignment.csproj" />
-	  <Using Include="Microsoft.VisualStudio.TestTools.UnitTesting" />
-  </ItemGroup>
-
-</Project>
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
+    <PackageReference Include="MSTest.TestAdapter" Version="4.0.2" />
+    <PackageReference Include="MSTest.TestFramework" Version="4.0.2" />
+    <PackageReference Include="coverlet.collector" Version="6.0.4">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <ProjectReference Include="..\Assignment\Assignment.csproj" />
+	  <Using Include="Microsoft.VisualStudio.TestTools.UnitTesting" />
+  </ItemGroup>
+
+</Project>

Assignment.Tests/MockPingProcess.cs

@@ -0,0 +1,65 @@
+using Assignment;
+using System;
+using System.Diagnostics;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Assignment.Tests;
+
+internal sealed class MockPingProcess : PingProcess
+{
+    private readonly string _pingTemplate = @"
+Pinging * with 32 bytes of data:
+Reply from ::1: time<1ms
+Reply from ::1: time<1ms
+Reply from ::1: time<1ms
+Reply from ::1: time<1ms
+
+Ping statistics for ::1:
+    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
+Approximate round trip times in milli-seconds:
+    Minimum = 0ms, Maximum = 0ms, Average = 0ms".Trim();
+
+    protected override int RunProcessInternal(
+        ProcessStartInfo startInfo,
+        Action<string?>? stdoutCallback,
+        Action<string?>? stderrCallback,
+        CancellationToken cancellationToken)
+    {
+        // simulate network delay
+        Task.Delay(400, cancellationToken).Wait(cancellationToken);
+
+        string host = startInfo.Arguments?.Split(' ')[0] ?? "localhost";
+
+        // simulate a host not found
+        if (host.Equals("badaddress", StringComparison.OrdinalIgnoreCase))
+        {
+            string message = $"Ping request could not find host {host}. Please check the name and try again.";
+            stdoutCallback?.Invoke(message);
+            stdoutCallback?.Invoke(null);
+            stderrCallback?.Invoke(null);
+            return 1;
+        }
+
+        // output fake ping results
+        foreach (var line in GenerateLines(host))
+        {
+            stdoutCallback?.Invoke(line);
+        }
+
+        stdoutCallback?.Invoke(null);
+        stderrCallback?.Invoke(null);
+
+        return 0;
+    }
+
+    private string[] GenerateLines(string host)
+    {
+        string[] lines = _pingTemplate.Split(Environment.NewLine, StringSplitOptions.None);
+        if (lines.Length > 0 && lines[0].Contains('*'))
+        {
+            lines[0] = lines[0].Replace("*", host);
+        }
+        return lines;
+    }
+}