AnswerHow many tests?
time to read 2 min | 365 words

Two days ago I asked how many tests this method need:

///<summary> 
///Get the latest published webcast 
///</summary>
public Webcast GetLatest();

Here is what I came up with:

[TestFixture]
public class WebcastRepositoryTest : DatabaseTestFixtureBase
{
	private IWebcastRepository webcastRepository;

	[TestFixtureSetUp]
	public void TestFixtureSetup()
	{
		IntializeNHibernateAndIoC(PersistenceFramework.ActiveRecord, 
			"windsor.boo", MappingInfo.FromAssemblyContaining<Webcast>());
	}

	[SetUp]
	public void Setup()
	{
		CurrentContext.CreateUnitOfWork();
		webcastRepository = IoC.Resolve<IWebcastRepository>();
	}

	[TearDown]
	public void Teardown()
	{
		CurrentContext.DisposeUnitOfWork();
	}

	[Test]
	public void Can_save_webcast()
	{
		var webcast = new Webcast { Name = "test", PublishDate = null };
		With.Transaction(() => webcastRepository.Save(webcast));
		Assert.AreNotEqual(0, webcast.Id);
	}

	[Test]
	public void Can_load_webcast()
	{
		var webcast = new Webcast { Name = "test", PublishDate = null };
		With.Transaction(() => webcastRepository.Save(webcast));
		UnitOfWork.CurrentSession.Evict(webcast);

		var webcast2 = webcastRepository.Get(webcast.Id);
		Assert.AreEqual(webcast.Id, webcast2.Id);
		Assert.AreEqual("test", webcast2.Name);
		Assert.IsNull(webcast2.PublishDate);
	}

	[Test]
	public void When_asking_for_latest_webcast_will_not_consider_any_that_is_not_published()
	{
		var webcast = new Webcast { Name = "test", PublishDate = null };
		With.Transaction(() => webcastRepository.Save(webcast));

		Assert.IsNull(webcastRepository.GetLatest());
	}

	[Test]
	public void When_asking_for_latest_webcast_will_get_published_webcast()
	{
		var webcast = new Webcast { Name = "test", PublishDate = null };
		With.Transaction(() => webcastRepository.Save(webcast));
		var webcast2 = new Webcast { Name = "test", PublishDate = DateTime.Now.AddDays(-1) };
		With.Transaction(() => webcastRepository.Save(webcast2));

		Assert.AreEqual(webcast2.Id, webcastRepository.GetLatest().Id);
	}

	[Test]
	public void When_asking_for_latest_webcast_will_get_the_latest_webcast()
	{
		var webcast = new Webcast { Name = "test", PublishDate = DateTime.Now.AddDays(-2) };
		With.Transaction(() => webcastRepository.Save(webcast));
		var webcast2 = new Webcast { Name = "test", PublishDate = DateTime.Now.AddDays(-1) };
		With.Transaction(() => webcastRepository.Save(webcast2));

		Assert.AreEqual(webcast2.Id, webcastRepository.GetLatest().Id);
	}

	[Test]
	public void When_asking_for_latest_webcast_will_not_consider_webcasts_published_in_the_future()
	{
		var webcast = new Webcast { Name = "test", PublishDate = DateTime.Now.AddDays(-2) };
		With.Transaction(() => webcastRepository.Save(webcast));
		var webcast2 = new Webcast { Name = "test", PublishDate = DateTime.Now.AddDays(2) };
		With.Transaction(() => webcastRepository.Save(webcast2));
		Assert.AreEqual(webcast.Id, webcastRepository.GetLatest().Id);
	}
}

And the implementation:

public class WebcastRepository : RepositoryDecorator<Webcast>, IWebcastRepository
{
	public WebcastRepository(IRepository<Webcast> repository)
	{
		Inner = repository;
	}

	public Webcast GetLatest()
	{
		var publishedWebcastsByDateDesc =
			from webcast in Webcasts
			where webcast.PublishDate != null && webcast.PublishDate < SystemTime.Now()
			orderby webcast.PublishDate descending 
			select webcast;

		return publishedWebcastsByDateDesc.FirstOrDefault();
	}

	private static IOrderedQueryable<Webcast> Webcasts
	{
		get { return UnitOfWork.CurrentSession.Linq<Webcast>(); }
	}
}

I think it is pretty sweet.

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