Async command unit tests

test/Spectre.Console.Cli.Tests/Data/Commands/AsynchronousCommand.cs

@@ -0,0 +1,28 @@
+namespace Spectre.Console.Tests.Data;
+
+public sealed class AsynchronousCommand : AsyncCommand<AsynchronousCommandSettings>
+{
+    private readonly IAnsiConsole _console;
+
+    public AsynchronousCommand(IAnsiConsole console)
+    {
+        _console = console;
+    }
+
+    public async override Task<int> ExecuteAsync(CommandContext context, AsynchronousCommandSettings settings)
+    {
+        // Simulate a long running asynchronous task
+        await Task.Delay(200);
+
+        if (settings.ThrowException)
+        {
+            throw new Exception($"Throwing exception asynchronously");
+        }
+        else
+        {
+            _console.WriteLine($"Finished executing asynchronously");
+        }
+
+        return 0;
+    }
+}

test/Spectre.Console.Cli.Tests/Data/Commands/ThrowingCommand.cs

@@ -6,8 +6,4 @@ public sealed class ThrowingCommand : Command<ThrowingCommandSettings>
     {
         throw new InvalidOperationException("W00t?");
     }
-}
-
-public sealed class ThrowingCommandSettings : CommandSettings
-{
-}
+}