Game Engine Tests for TDD

NebraskaCodeGameEngineTests

using System;
using GameNetworkInterfaces;
using Moq;
using NUnit.Framework;
using TicTacToe.Core;

namespace TicTacToe.UnitTests
{
    [TestFixture]
    class GameEngineTests
    {
        private GameEngine _gameEngine;
        private string[,] _board;
        private Mock<ICommonGameNetworkControl> _networkMock;

        [SetUp]
        public void SetUpTests()
        {
            _board = new string[3, 3] { { " ", " ", " " }, { " ", " ", " " }, { " ", " ", " " } };

            _networkMock = new Mock<ICommonGameNetworkControl>();

            _gameEngine = new GameEngine(_networkMock.Object);            
        }

        [Test]
        public void WhenTheBoardIsEmptyThenThereIsNotWinnerYet()
        {
            //Arrainge
            var expectedResult = " ";
            
            //Act
            var result = _gameEngine.GetWinner(_board);

            //Assert
            Assert.AreEqual(expectedResult, result);
        }

        [Test]
        public void WhenTheTopRowIsAllXThenXWins()
        {
            //Arrainge
            _board[0,0] ="X";           
            _board[0,1] ="X";           
            _board[0,2] ="X";
                       
            var expectedResult = "X";

            //Act
            var result = _gameEngine.GetWinner(_board);

            //Assert
            Assert.AreEqual(expectedResult, result);
        }

        [Test]
        public void WhenILogInIShoulGetASessionToken()
        {
            //arr
            var userName = "bob";
            var password = "12345";
            var expectedResult = Guid.NewGuid();
            _networkMock.Setup(x => x.Login(userName, password)).Returns(expectedResult);

            //act
            var result = _gameEngine.Login(userName, password);

            //assert
            Assert.AreEqual(expectedResult, result);
        }
    }
}