/Source/Bifrost.Tests/Events/EventDispatcherTests.cs

using System.Collections.Generic;

using Bifrost.Events;

using Moq;

using NUnit.Framework;



namespace Bifrost.Tests.Events

{

	[TestFixture]

	public class EventDispatcherTests

	{

		[Test]

		public void PublishingSingleEventShouldPublishEventToRegisteredBus()

		{

			var busMock = new Mock<IEventBus>();

			var dispatcher = new EventDispatcher();

			var eventMock = new Mock<IEvent>();

			dispatcher.RegisterBus(busMock.Object);

			dispatcher.Publish(eventMock.Object);

			

			busMock.Verify(b => b.Publish(It.IsAny<IEvent>()), Times.Once());

		}



		[Test]

		public void PublishingSingleShouldPublishEventToAllRegisteredBuses()

		{

			var firstBusMock = new Mock<IEventBus>();

			var secondBusMock = new Mock<IEventBus>();

			var dispatcher = new EventDispatcher();

			var eventMock = new Mock<IEvent>();

			dispatcher.RegisterBus(firstBusMock.Object);

			dispatcher.RegisterBus(secondBusMock.Object);

			dispatcher.Publish(eventMock.Object);



			firstBusMock.Verify(b => b.Publish(It.IsAny<IEvent>()), Times.Once());

			secondBusMock.Verify(b => b.Publish(It.IsAny<IEvent>()), Times.Once());

		}



		[Test]

		public void PublishingMultipleEventsShouldPublishEventsToRegisteredBus()

		{

			var busMock = new Mock<IEventBus>();

			var dispatcher = new EventDispatcher();



			var events = new List<IEvent>();

			for( var i=0; i<10; i++ )

			{

				var eventMock = new Mock<IEvent>();

				events.Add(eventMock.Object);

			}

			

			dispatcher.RegisterBus(busMock.Object);

			dispatcher.Publish(events);



			busMock.Verify(b => b.Publish(It.IsAny<IEnumerable<IEvent>>()), Times.Once());

		}



		[Test]

		public void PublishingMultipleEvennntsShouldPublishEventsToAllRegisteredBuses()

		{

			var firstBusMock = new Mock<IEventBus>();

			var secondBusMock = new Mock<IEventBus>();

			var dispatcher = new EventDispatcher();

			dispatcher.RegisterBus(firstBusMock.Object);

			dispatcher.RegisterBus(secondBusMock.Object);

			var events = new List<IEvent>();

			for (var i = 0; i < 10; i++)

			{

				var eventMock = new Mock<IEvent>();

				events.Add(eventMock.Object);

			}





			dispatcher.Publish(events);



			firstBusMock.Verify(b => b.Publish(It.IsAny<IEnumerable<IEvent>>()), Times.Once());

			secondBusMock.Verify(b => b.Publish(It.IsAny<IEnumerable<IEvent>>()), Times.Once());

		}



	}

}