EventManipulationUtilsTests.cs :  » Inversion-of-Control-Dependency-Injection » Spring.net » Spring » Objects » Events » Support » Tests » C# / CSharp Open Source

#region License

/*
 * Copyright 2002-2005 the original author or authors.
 *
 * 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.
 */

#endregion

#region Imports

using System;
using System.Reflection;
using NUnit.Framework;

#endregion

namespace Spring.Objects.Events.Support.Tests{
  /// <summary>
  /// Unit tests for the EventManipulationUtils class.
  /// </summary>
  [TestFixture]
  public sealed class EventManipulationUtilsTests
  {
    [Test]
    public void FoundEventHandlers()
    {
      Type pubType = typeof (SimpleEventPublisher);
      EventInfo[] events = pubType.GetEvents();

      foreach (EventInfo currentEvent in events)
      {
        Type eventHandlerType = currentEvent.EventHandlerType;
        MethodInfo invoke = eventHandlerType.GetMethod("Invoke");
        Assert.IsNotNull(EventManipulationUtils.GetMethodInfoMatchingSignature(invoke, typeof (SimpleEventSubscriber)));
      }
    }

    [Test]
    public void FoundSomeEventHandlers()
    {
      Type pubType = typeof (SimpleEventPublisher);
      EventInfo[] events = pubType.GetEvents();
      foreach (EventInfo currentEvent in events)
      {
        Type eventHandlerType = currentEvent.EventHandlerType;
        MethodInfo invoke = eventHandlerType.GetMethod("Invoke");
        if (currentEvent.Name == "MyFirstEvent" || currentEvent.Name == "MySecondEvent")
        {
          Assert.IsNotNull(EventManipulationUtils.GetMethodInfoMatchingSignature(invoke, typeof (SomeEventSubscriber)));
        }
        else
        {
          Assert.IsNull(EventManipulationUtils.GetMethodInfoMatchingSignature(invoke, typeof (SomeEventSubscriber)));
        }
      }
    }

    [Test]
    public void FoundNoHandlers()
    {
      Type pubType = typeof (SimpleEventPublisher);
      EventInfo[] events = pubType.GetEvents();

      foreach (EventInfo currentEvent in events)
      {
        Type eventHandlerType = currentEvent.EventHandlerType;
        MethodInfo invoke = eventHandlerType.GetMethod("Invoke");
        Assert.IsNull(EventManipulationUtils.GetMethodInfoMatchingSignature(invoke, typeof (NoEventSubscriber)));
      }
    }

    #region Helper Classes

    internal delegate void Delegate1(object source, string name);

    internal delegate string Delegate2(string name, bool flag);

    internal delegate bool Delegate3(string name, bool flag);

    internal class SimpleEventPublisher
    {
      public event Delegate1 MyFirstEvent;
      public event Delegate2 MySecondEvent;
      public event Delegate3 MyThirdEvent;
    }

    internal class SimpleEventSubscriber
    {
      public void MyFirstEvent_Handler(object source, string name)
      {
      }

      public string MySecondEvent_Handler(string name, bool flag)
      {
        return String.Empty;
      }

      public bool MyThirdEvent_Handler(string name, bool flag)
      {
        return false;
      }
    }

    internal class NoEventSubscriber
    {
      public void MyFirstEvent_Handler(object source, string name, bool flag)
      {
      }

      public void MySecondEvent_Handler(string name, bool flag)
      {
      }

      public string MyThirdEvent_Handler(string name)
      {
        return String.Empty;
      }
    }

    internal class SomeEventSubscriber
    {
      public void MyFirstEvent_Handler(object source, string name)
      {
      }

      public string MySecondEvent_Handler(string name, bool flag)
      {
        return String.Empty;
      }
    }

    #endregion
  }
}