Add unit tests

SboxAnalyzers.Test/ServerCmdAnalyzerUnitTests.cs

@@ -0,0 +1,37 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System.Threading.Tasks;
+using VerifyCS = SboxAnalyzers.Test.CSharpAnalyzerVerifier<SboxAnalyzers.ServerCmdAnalyzer>;
+
+namespace SboxAnalyzers.Test;
+
+[TestClass]
+public class ServerCmdAnalyzerUnitTest
+{
+	[TestMethod]
+	public async Task Error_ServerCommandParameter()
+	{
+		var test = @"
+			using System;
+
+			public static class ConCmd
+			{
+				[AttributeUsage( AttributeTargets.Method )]
+				public class ServerAttribute : Attribute
+				{
+				}
+			}
+
+			public class Test
+			{
+				[ConCmd.Server]
+				public void Test1( {|#0:object|} obj )
+				{
+				}
+			}";
+
+		var expected = VerifyCS.Diagnostic( Diagnostics.ServerCmd.UnsupportedId )
+			.WithLocation( 0 )
+			.WithArguments( "System.Object" );
+		await VerifyCS.VerifyAnalyzerAsync( test, expected );
+	}
+}