battleship fluent assertions.cs

// requires https://www.nuget.org/packages/FluentAssertions/
using FluentAssertions;
using FluentAssertions.Primitives;
using Microsoft.VisualStudio.TestTools.UnitTesting;

[TestClass]
public class UnitTest1
{
    [TestMethod]
    public void TestMethod1()
    {
        // create a 11X9 Battleship game 
        var battleshipGame = new BattleshipGame()
            .Should().HaveWidth(11).And.HaveHeight(9).And.Subject;
    }
}

public class BattleshipGame
{
    public BattleshipGame()
    {
        // placeholder; Width and Height should be initialized in some way we're not specifying today
        Width = 11;
        Height = 9;
    }

    public int Width { get; }
    public int Height { get; }
}

public static class BattleshipGameExtensions
{
    public static Assertions Should(this BattleshipGame subject)
    {
        return new Assertions(subject);
    }

    public class Assertions : ReferenceTypeAssertions<BattleshipGame, Assertions>
    {
        public Assertions(BattleshipGame subject) : base(subject)
        {
        }

        protected override string Identifier => "Battleship";

        public AndConstraint<Assertions> HaveWidth(int i)
        {
            Subject.Width.Should().Be(i);
            return new AndConstraint<Assertions>(this);
        }

        public AndConstraint<Assertions> HaveHeight(int i)
        {
            Subject.Height.Should().Be(i);
            return new AndConstraint<Assertions>(this);
        }
    }
}