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// -----------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
// -----------------------------------------------------------------------
using System;
using System.ComponentModel.Composition.Factories;
using System.ComponentModel.Composition.Hosting;
using System.Linq;
using System.UnitTesting;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace System.ComponentModel.Composition
{
[TestClass]
public class CompositionContainerExtensibilityTests
{
[TestMethod]
public void Dispose_DoesNotThrow()
{
var container = CreateCustomCompositionContainer();
container.Dispose();
}
[TestMethod]
public void DerivedCompositionContainer_CanExportItself()
{
var container = CreateCustomCompositionContainer();
container.AddAndComposeExportedValue<CustomCompositionContainer>(container);
Assert.AreSame(container, container.GetExportedValue<CustomCompositionContainer>());
}
[TestMethod]
public void ICompositionService_CanBeExported()
{
var container = CreateCustomCompositionContainer();
container.AddAndComposeExportedValue<ICompositionService>(container);
Assert.AreSame(container, container.GetExportedValue<ICompositionService>());
}
[TestMethod]
public void CompositionContainer_CanBeExported()
{
var container = CreateCustomCompositionContainer();
container.AddAndComposeExportedValue<CompositionContainer>(container);
Assert.AreSame(container, container.GetExportedValue<CompositionContainer>());
}
[TestMethod]
public void CanBeCollectedAfterDispose()
{
AggregateExportProvider exportProvider = new AggregateExportProvider();
var catalog = new AggregateCatalog(CatalogFactory.CreateDefaultAttributed());
var container = new CompositionContainer(catalog, exportProvider);
WeakReference weakContainer = new WeakReference(container);
container.Dispose();
container = null;
GC.Collect();
GC.WaitForPendingFinalizers();
Assert.IsFalse(weakContainer.IsAlive);
GC.KeepAlive(exportProvider);
GC.KeepAlive(catalog);
}
private CustomCompositionContainer CreateCustomCompositionContainer()
{
return new CustomCompositionContainer();
}
// Type needs to be public otherwise container.GetExportedValue<CustomCompositionContainer>
// fails on Silverlight because it cannot construct a Lazy<T,M> factory.
public class CustomCompositionContainer : CompositionContainer
{
}
}
}
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