Proper unit testing: testing a method with no [accessible] state or return value

public static void main(String[] args)
 {
     Server myServer = new Server()
     if(myServer.start())
          System.out.println("started");
     else
          System.out.println("failed");
 }

static void Main()
{
  Application.EnableVisualStyles();
  Application.SetCompatibleTextRenderingDefault(false);
  Application.Run(new MainWindow());
}

static void Main()
{
  new MainApp().Run();
}

public class MainApp
{
  private Server m_Server;
  public MainApp():this(new Server())
  {}
  public MainApp(Server s)
  {  m_Server = s;      }

  public void Run()
  {  Log(LaunchServer());  }

  private string LaunchServer()
  {  return (m_Server.start() ? "started" : "failed");        }

  protected virtual void Log(string sMessage)
  {  System.Console.WriteLine(sMessage);        }
}

public class FakeApp : MainApp
{
  private string sLastLoggedMessage;

  public FakeApp(Server s) : base(s) { }

  public string getLastLoggedMessage()
  {  return sLastLoggedMessage;        }

  protected override void Log(string sMessage)
  {  sLastLoggedMessage = sMessage;        }
}

[TestFixture]
public class TestMainApp
{
  [Test]
  public void TestRun()
  {
    Server s = new Server();
    FakeApp f = new FakeApp(s);

    f.Run();

    Assert.AreEqual("started", f.getLastLoggedMessage());
  }
}

Server myServer = new Server();

Server myServer = applicationContext.getBean("server");