ConcreteSubjectTest

using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using WebsiteObserver;
using Moq;

namespace WebsiteObserverTest
{
    [TestClass]
    public class ConcreteSubjectTest
    {
        Mock<Subject> subject;
        Mock<IObserver> observer;
        string url;
        DateTime date;

        [TestInitialize()]
        public void Initialize()
        {
            url = "https://www.pja.edu.pl/";
            date = new DateTime(2017, 12, 10);
            subject = new Mock<Subject>();
            observer = new Mock<IObserver>();
        }

        [TestMethod]
        public void GetStateTest()
        {
            Assert.AreNotEqual(DateTime.Now, subject.Setup(x => x.GetState(url)).Returns(date));
        }

        [TestMethod]
        public void SetStateTest()
        {
            subject.Setup(x => x.SetState(url, DateTime.Now));
            Assert.AreNotEqual(DateTime.Now.AddDays(1), subject.Setup(x => x.GetState(url)).Returns(date));
        }

        [TestMethod]
        public void AttachTest()
        {
            subject.Object.Attach(observer.Object);
            subject.VerifyAll();
        }

        [TestMethod]
        public void DetachTest()
        {
            subject.Setup(x=>x.Attach(observer.Object));
            subject.Setup(x => x.Detach(observer.Object)).Verifiable();
        }
    }
}