SpecsFor Examples

SpecsForFeaturesInAction.cs

	protected override void Given()
	{
		//Access Moq objects easily
		GetMockFor<IInventory>()
			.Setup(i => i.IsQuantityAvailable("TestPart", 10))
			.Returns(true)
			.Verifiable();
	}

	protected override void When()
	{
		//The class under test is created automatically, no need to manually
		//wire up dependencies with mock objects. 
		_result = SUT.Process(new Order { PartNumber = "TestPart", Quantity = 10 });
	}

	[Test]
	public void then_the_order_is_accepted()
	{
		//Use Should to write fluent asserts.
		_result.WasAccepted.ShouldBeTrue();	
	}
	
	...

	[Test]
	public void then_it_returns_a_successful_result()
	{
		//Utilize ExpectedObjects via new SpecsFor extension methods.
		_result.ShouldLookLike(new InvoiceSubmissionResult {Accepted = true, AcceptedDate = DateTime.Today});
	}

	[Test]
	public void then_it_publishes_an_event()
	{
		//The Looks.Like method simplifies the creation of complex mock expectations.
		GetMockFor<IPublisher>()
			.Verify(p => p.Publish(Looks.Like(new InvoiceSubmittedEvent
			{
				BillingName = _invoice.BillingName,
				BillingAddress = _invoice.BillingAddress,
				BillingCity = _invoice.BillingCity,
				BillingZip = _invoice.BillingZip,
				Amount = _invoice.Amount,
				Description = _invoice.Description
			})));
	}

SpecsForSummaryExample.cs

//BDD-Style Tests
public class OrderProcessorSpecs
{
	public class given_the_item_is_available_when_processing_an_order : SpecsFor<OrderProcessor>
	{
		private OrderResult _result;

		protected override void Given()
		{
			GetMockFor<IInventory>()
								.Setup(i => i.IsQuantityAvailable("TestPart", 10))
								.Returns(true)
								.Verifiable();
		}

		protected override void When()
		{
			_result = SUT.Process(new Order { PartNumber = "TestPart", Quantity = 10 });
		}

		[Test]
		public void then_the_order_is_accepted()
		{
			_result.WasAccepted.ShouldBeTrue();	
		}

		[Test]
		public void then_it_checks_the_inventory()
		{
			GetMockFor<IInventory>().Verify();
		}

		[Test]
		public void then_it_raises_an_order_submitted_event()
		{
			GetMockFor<IPublisher>()
				.Verify(p => p.Publish(It.Is<OrderSubmitted>(o => o.OrderNumber == _result.OrderNumber)));
		}
	}
}
...
//Old-school test methods
public class OrderProcessorSpecs : SpecsFor<OrderProcessor>
{
	[Test]
	public void Order_submitted_successfully_Tests()
	{
		GetMockFor<IInventory>()
			.Setup(i => i.IsQuantityAvailable("TestPart", 10))
			.Returns(true)
			.Verifiable();

		var result = SUT.Process(new Order {PartNumber = "TestPart", Quantity = 10});

		result.WasAccepted.ShouldBeTrue();

		GetMockFor<IInventory>().Verify();

		GetMockFor<IPublisher>()
			.Verify(p => p.Publish(It.Is<OrderSubmitted>(o => o.OrderNumber == result.OrderNumber)));
	}
}