// Copyright 2004-2008 Castle Project - http://www.castleproject.org/
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//     http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

namespace Castle.DynamicProxy.Tests
{
	using System;
	using System.Collections.Generic;
	using System.Data;
	using Castle.Core.Interceptor;
	using Castle.DynamicProxy.Tests.Interceptors;
	using Castle.DynamicProxy.Tests.InterClasses;
	using NUnit.Framework;

	[TestFixture]
	public class BasicInterfaceProxyWithoutTargetTestCase : BasePEVerifyTestCase
	{
		[Test]
		[ExpectedException(typeof (NotImplementedException),
			ExpectedMessage =
				"This is a DynamicProxy2 error: the interceptor attempted to 'Proceed' for a method without a target, for example, an interface method or an abstract method"
			)]
		public void BasicInterfaceProxyWithValidTarget_ThrowsIfInterceptorCallsProceed()
		{
			IService service = (IService)
			                   generator.CreateInterfaceProxyWithoutTarget(
			                   	typeof (IService), new StandardInterceptor());

			service.Sum(1, 2);
		}

		[Test]
		public void CanReplaceReturnValueOfInterfaceMethod()
		{
			IService service = (IService)
			                   generator.CreateInterfaceProxyWithoutTarget(
			                   	typeof (IService), new ReturnThreeInterceptor());

			int result = service.Sum(2, 2);
			Assert.AreEqual(3, result);
		}

		[Test]
		[ExpectedException(typeof (DBConcurrencyException), ExpectedMessage = "Because I feel like it")]
		public void CanThrowExceptionFromInterceptorOfInterfaceMethod()
		{
			IService service = (IService)
			                   generator.CreateInterfaceProxyWithoutTarget(
			                   	typeof (IService), new ThrowingInterceptor());

			service.Sum(2, 2);
		}

		[Test]
		public void ProxyWithGenericTypeThatInheritFromGenericType()
		{
			// Only PEVerify is enough
			generator.CreateInterfaceProxyWithoutTarget<IList<int>>(new ThrowingInterceptor());
		}

		[Test]
		public void ProducesInvocationsThatCantChangeTarget()
		{
			IService service = (IService)
			                   generator.CreateInterfaceProxyWithoutTarget(
			                   	typeof (IService), new AssertCannotChangeTargetInterceptor(), new ReturnThreeInterceptor());

			int result = service.Sum(2, 2);
			Assert.AreEqual(3, result);
		}

		public class ReturnThreeInterceptor : IInterceptor
		{
			public void Intercept(IInvocation invocation)
			{
				invocation.ReturnValue = 3;
			}
		}

		public class ThrowingInterceptor : IInterceptor
		{
			public void Intercept(IInvocation invocation)
			{
				throw new DBConcurrencyException("Because I feel like it");
			}
		}
	}
}