1 files changed, 149 insertions, 0 deletions
diff --git a/Xamarin.Forms.Core.UnitTests/RegistrarUnitTests.cs b/Xamarin.Forms.Core.UnitTests/RegistrarUnitTests.cs
new file mode 100644
index 00000000..9758eaf0
--- /dev/null
+++ b/Xamarin.Forms.Core.UnitTests/RegistrarUnitTests.cs
@@ -0,0 +1,149 @@
+using System;
+using System.Reflection;
+using NUnit.Framework;
+using Xamarin.Forms;
+using Xamarin.Forms.Core.UnitTests;
+
+[assembly: TestHandler (typeof (Button), typeof (ButtonTarget))]
+[assembly: TestHandler (typeof (Slider), typeof (SliderTarget))]
+
+namespace Xamarin.Forms.Core.UnitTests
+{
+	internal class TestHandlerAttribute : HandlerAttribute
+	{
+		public TestHandlerAttribute (Type handler, Type target) : base (handler, target)
+		{
+			
+		}
+	}
+
+	internal class ButtonTarget : IRegisterable {}
+
+	internal class SliderTarget : IRegisterable {}
+
+	[TestFixture]
+	public class RegistrarTests : BaseTestFixture
+	{
+		[SetUp]
+		public override void Setup ()
+		{
+			base.Setup ();
+			Device.PlatformServices = new MockPlatformServices ();
+			Registrar.RegisterAll (new [] {
+				typeof (TestHandlerAttribute)
+			});
+
+		}
+
+		[TearDown]
+		public override void TearDown()
+		{
+			base.TearDown ();
+			Device.PlatformServices = null;
+		}
+
+		[Test]
+		public void GetButtonHandler ()
+		{
+			var buttonTarget = Registrar.Registered.GetHandler<ButtonTarget> (typeof (Button));
+			Assert.IsNotNull (buttonTarget);
+			Assert.That (buttonTarget, Is.InstanceOf<ButtonTarget>());
+		}
+
+		[Test]
+		public void GetSliderHandler()
+		{
+			var sliderTarget = Registrar.Registered.GetHandler<SliderTarget> (typeof (Slider));
+			Assert.IsNotNull (sliderTarget);
+			Assert.That (sliderTarget, Is.InstanceOf<SliderTarget> ());
+		}
+	}
+
+	[TestFixture]
+	public class SimpleRegistrarUnitTests
+	{
+		class MockRenderer {}
+		class ButtonMockRenderer : MockRenderer {}
+		class ShinyButtonMockRenderer : MockRenderer {}
+		class CrashMockRenderer : MockRenderer
+		{
+			public CrashMockRenderer ()
+			{
+				throw new NotImplementedException();
+			}
+		}
+
+		[Test]
+		public void TestConstructor ()
+		{
+			var registrar = new Registrar<MockRenderer> ();
+
+			var renderer = registrar.GetHandler (typeof (Button));
+
+			Assert.Null (renderer);
+		}
+
+		[Test]
+		public void TestGetRendererForKnownClass ()
+		{
+			var registrar = new Registrar<MockRenderer> ();
+
+			registrar.Register (typeof(View), typeof(MockRenderer));
+
+			var renderer = registrar.GetHandler (typeof (View));
+
+			Assert.That (renderer, Is.InstanceOf<MockRenderer>());
+		}
+
+		[Test]
+		public void TestGetRendererForUnknownSubclass ()
+		{
+			var registrar = new Registrar<MockRenderer> ();
+
+			registrar.Register (typeof (View), typeof (MockRenderer));
+
+			var renderer = registrar.GetHandler (typeof (Button));
+
+			Assert.That (renderer, Is.InstanceOf<MockRenderer>());
+		}
+
+		[Test]
+		public void TestGetRendererWithRegisteredSubclass ()
+		{
+			var registrar = new Registrar<MockRenderer> ();
+
+			registrar.Register (typeof (View), typeof (MockRenderer));
+			registrar.Register (typeof (Button), typeof (ButtonMockRenderer));
+
+			var buttonRenderer = registrar.GetHandler (typeof (Button));
+			var viewRenderer = registrar.GetHandler (typeof (View));
+
+			Assert.That (buttonRenderer, Is.InstanceOf<ButtonMockRenderer>());
+			Assert.That (viewRenderer, Is.Not.InstanceOf<ButtonMockRenderer>());
+			Assert.That (viewRenderer, Is.InstanceOf<MockRenderer>());
+		}
+
+		[Test]
+		public void TestReplaceRenderer ()
+		{
+			var registrar = new Registrar<MockRenderer> ();
+
+			registrar.Register (typeof (View), typeof (MockRenderer));
+			registrar.Register (typeof (Button), typeof (ButtonMockRenderer));
+			registrar.Register (typeof (Button), typeof (ShinyButtonMockRenderer));
+
+			var buttonRenderer = registrar.GetHandler (typeof (Button));
+
+			Assert.That (buttonRenderer, Is.InstanceOf<ShinyButtonMockRenderer>());
+		}
+
+		[Test]
+		public void GetHandlerType()
+		{
+			var registrar = new Registrar<MockRenderer>();
+			registrar.Register (typeof (View), typeof (MockRenderer));
+
+			Assert.AreEqual (typeof (MockRenderer), registrar.GetHandlerType (typeof (View)));
+		}
+	}
+}