MVP - A Basic Demonstration of its Power

using System;
using System.Text;
using System.Collections.Generic;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Heynemann.LoginSample.UI;

namespace Heynemann.LoginSample.UnitTests {
    /// <summary>
    /// Summary description for LoginUITest
    /// </summary>
    [TestClass]
    public class LoginUITest {
        public LoginUITest() {
        }

        private ILoginForm view;
        private LoginFormPresenter presenter;
        
        [TestInitialize()]
        public void MyTestInitialize() {
            //Create a new view (the one that simulates a form)
            view = new Mocks.LoginFormMock();
            //Create the presenter that will be responsible for
            //the behavior of the view.
            presenter = new LoginFormPresenter(view);
            //Initialize the presenter.
            presenter.InitializeView(ViewInitialization.FirstTime);
        }

        [TestMethod]
        public void TestLoginUI() {
            //values to test against.
            string targetUser = "heynemann";
            string targetPass = "MVProx!";

            //Set the view values to the values I want to use.
            view.Username = targetUser;
            view.Password = targetPass;
            
            //Before invoking the event, I make sure the view
            //retained the values I passed in.
            Assert.AreEqual<string>(targetUser, view.Username);
            Assert.AreEqual<string>(targetPass, view.Password);
            
            //This method is used to simulate a button click.
            ((Mocks.LoginFormMock)view).RaiseLoginButtonClickEvent();

            //If the Presenter handled the click event 
            //the user should be logged by now.
            Assert.AreEqual<bool>(true, view.IsLoggedIn);
        }
    }
}