Add a few tests and refactor comments

Author: ethanhann

src/InEngine.Commands.Test/InEngine.Commands.Test.csproj

@@ -10,6 +10,7 @@
 
     <ItemGroup>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
+        <PackageReference Include="Moq" Version="4.7.145" />
         <PackageReference Include="NUnit" Version="3.13.3" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
         <PackageReference Include="NUnit.Analyzers" Version="3.3.0" />

src/InEngine.Commands.Test/Sample/MinimalTest.cs

@@ -0,0 +1,22 @@
+using InEngine.Commands.Sample;
+using InEngine.Core.IO;
+using InEngineTesting;
+using Moq;
+
+namespace InEngine.Commands.Test.Sample;
+
+public class MinimalTest : TestBase<Minimal>
+{
+    [Test]
+    public async Task ShouldSucceed()
+    {
+        const string expected = "This is an example of a minimal command.";
+        var mockWrite = new Mock<IConsoleWrite>();
+        Subject.Write = mockWrite.Object;
+
+        await Subject.RunAsync();
+
+        mockWrite.Verify(x => x.Info(expected), Times.Once());
+        Assert.Pass();
+    }
+}

src/InEngine.Commands.Test/Sample/SayHelloTest.cs

@@ -0,0 +1,22 @@
+using InEngine.Commands.Sample;
+using InEngine.Core.IO;
+using InEngineTesting;
+using Moq;
+
+namespace InEngine.Commands.Test.Sample;
+
+public class SayHelloTest : TestBase<SayHello>
+{
+    [Test]
+    public async Task ShouldSayHelloTest()
+    {
+        const string expected = "hello";
+        var mockWrite = new Mock<IConsoleWrite>();
+        Subject.Write = mockWrite.Object;
+
+        await Subject.RunAsync();
+
+        mockWrite.Verify(x => x.Info(expected), Times.Once());
+        Assert.Pass();
+    }
+}

src/InEngine.Commands/Sample/ShowProgress.cs

@@ -3,16 +3,11 @@
 
 namespace InEngine.Commands.Sample;
 
-/*
- * The AbstractCommand class adds functionality, including a logger and a 
- * progress bar.
- */
+/// <summary>
+/// The AbstractCommand class adds functionality, including a logger and a progress bar.
+/// </summary>
 public class ShowProgress : AbstractCommand
 {
-    /*
-     * Note that the override keyword is necessary in the Run method 
-     * signature as the base class method is virtual.
-     */
     public override async Task RunAsync()
     {
         // Define the ticks (aka steps) for the command...