/// <summary>
/// Enables Managed Extensibility Framework two-way integration.
/// </summary>
/// <param name="unityContainer">Target container.</param>
/// <returns>
/// <see cref="CompositionIntegration"/> instance.
/// </returns>
public static CompositionIntegration EnableCompositionIntegration(
this IUnityContainer unityContainer)
{
lock (unityContainer)
{
var extension = unityContainer.Configure<CompositionIntegration>();
if (extension == null)
{
var adapter = new UnityContainerAdapter(unityContainer);
var containerExportProvider = new ContainerExportProvider(adapter);
var parentExtension = (CompositionIntegration) null;
if (unityContainer.Parent != null)
{
parentExtension = unityContainer.Parent.Configure<CompositionIntegration>();
}
if (parentExtension != null)
{
// Get the parent ContainerExportProvider
var parentContainerExportProvider = (ContainerExportProvider)parentExtension.Providers.Where(
ep => typeof(ContainerExportProvider).IsAssignableFrom(ep.GetType())).First();
// Collect all the exports provided by the parent container and add
// them to the child export provider
foreach (var definition in parentContainerExportProvider.FactoryExportProvider.ReadOnlyDefinitions)
{
containerExportProvider.FactoryExportProvider.Register(
definition.ContractType,
definition.RegistrationName);
}
// Grab all the parent export providers except the container ones
var parentExporters = new List<ExportProvider>(
parentExtension.Providers.Where(
ep => !typeof (ContainerExportProvider).IsAssignableFrom(ep.GetType())))
{ containerExportProvider };
var catalog = new AggregateCatalog(parentExtension.Catalogs);
extension = new CompositionIntegration(true, parentExporters.ToArray());
extension.Catalogs.Add(catalog);
}
else
{
extension = new CompositionIntegration(true, containerExportProvider);
}
unityContainer.AddExtension(extension);
}
return extension;
}
}
public void ExportProviderResolvesServiceRegisteredByTypeTest()
{
// Setup
var builder = new ContainerBuilder();
builder.RegisterType<AutofacOnlyComponent1>().As<IAutofacOnlyComponent>();
var autofacContainer = builder.Build();
var adapter = new AutofacContainerAdapter(autofacContainer);
var provider = new ContainerExportProvider(adapter);
var component = provider.GetExportedValue<IAutofacOnlyComponent>();
Assert.That(component, Is.Not.Null);
Assert.That(component.GetType(), Is.EqualTo(typeof(AutofacOnlyComponent1)));
}
public void ExportProviderResolvesServiceRegisteredByTypeAndRegistrationNameTest()
{
// Setup
var unityContainer = new UnityContainer();
var adapter = new UnityContainerAdapter(unityContainer);
var provider = new ContainerExportProvider(adapter);
// Registration
unityContainer.RegisterType<IUnityOnlyComponent, UnityOnlyComponent2>("unityComponent2");
var component = provider.GetExportedValue<IUnityOnlyComponent>("unityComponent2");
Assert.That(component, Is.Not.Null);
Assert.That(component.GetType(), Is.EqualTo(typeof(UnityOnlyComponent2)));
}
public void ExportProviderResolvesServicesRegisteredByTypeTest()
{
// Setup
var builder = new ContainerBuilder();
builder.RegisterType<AutofacOnlyComponent1>().As<IAutofacOnlyComponent>();
builder.RegisterType<AutofacOnlyComponent2>().Named<IAutofacOnlyComponent>("b");
var autofacContainer = builder.Build();
var adapter = new AutofacContainerAdapter(autofacContainer);
var provider = new ContainerExportProvider(adapter);
var components = provider.GetExports<IAutofacOnlyComponent>();
Assert.That(components, Is.Not.Null);
Assert.That(components.Count(), Is.EqualTo(2));
Assert.That(components.Select(t => t.Value).OfType<AutofacOnlyComponent1>().Count(), Is.EqualTo(1));
Assert.That(components.Select(t => t.Value).OfType<AutofacOnlyComponent2>().Count(), Is.EqualTo(1));
}
public void ExportProviderResolvesServicesRegisteredByTypeTest()
{
// Setup
var unityContainer = new UnityContainer();
var adapter = new UnityContainerAdapter(unityContainer);
var provider = new ContainerExportProvider(adapter);
// Registration
unityContainer.RegisterType<IUnityOnlyComponent, UnityOnlyComponent1>();
unityContainer.RegisterType<IUnityOnlyComponent, UnityOnlyComponent2>("b");
var components = provider.GetExports<IUnityOnlyComponent>();
Assert.That(components, Is.Not.Null);
Assert.That(components.Count(), Is.EqualTo(2));
Assert.That(components.Select(t => t.Value).OfType<UnityOnlyComponent1>().Count(), Is.EqualTo(1));
Assert.That(components.Select(t => t.Value).OfType<UnityOnlyComponent2>().Count(), Is.EqualTo(1));
}
public void MefCanResolveLazyTypeRegisteredInUnityTest()
{
// Setup
var unityContainer = new UnityContainer();
var adapter = new UnityContainerAdapter(unityContainer);
var provider = new ContainerExportProvider(adapter);
var assemblyCatalog = new AssemblyCatalog(Assembly.GetExecutingAssembly());
var container = new CompositionContainer(assemblyCatalog, provider);
UnityOnlyComponent1.InstanceCount = 0;
unityContainer.RegisterType<IUnityOnlyComponent, UnityOnlyComponent1>();
var lazyUnityComponent = container.GetExport<IUnityOnlyComponent>();
Assert.That(lazyUnityComponent, Is.Not.Null);
Assert.That(UnityOnlyComponent1.InstanceCount, Is.EqualTo(0));
Assert.That(lazyUnityComponent.Value, Is.Not.Null);
Assert.That(lazyUnityComponent.Value.GetType(), Is.EqualTo(typeof(UnityOnlyComponent1)));
Assert.That(UnityOnlyComponent1.InstanceCount, Is.EqualTo(1));
}
public void MefCanResolveLazyTypeRegisteredInAutofacTest()
{
// Setup
var builder = new ContainerBuilder();
builder.RegisterType<AutofacOnlyComponent1>().As<IAutofacOnlyComponent>();
var autofacContainer = builder.Build();
var adapter = new AutofacContainerAdapter(autofacContainer);
var provider = new ContainerExportProvider(adapter);
var assemblyCatalog = new AssemblyCatalog(Assembly.GetExecutingAssembly());
var container = new CompositionContainer(assemblyCatalog, provider);
AutofacOnlyComponent1.InstanceCount = 0;
var lazyAutofacComponent = container.GetExport<IAutofacOnlyComponent>();
Assert.That(lazyAutofacComponent, Is.Not.Null);
Assert.That(AutofacOnlyComponent1.InstanceCount, Is.EqualTo(0));
Assert.That(lazyAutofacComponent.Value, Is.Not.Null);
Assert.That(lazyAutofacComponent.Value.GetType(), Is.EqualTo(typeof(AutofacOnlyComponent1)));
Assert.That(AutofacOnlyComponent1.InstanceCount, Is.EqualTo(1));
}
public void ComposeWithTwoContainerExportProvidersTest()
{
var builder1 = new ContainerBuilder();
var a = new A();
builder1.RegisterInstance(a);
var autofacContainer1 = builder1.Build();
var exportProvider1 = new ContainerExportProvider(new AutofacContainerAdapter(autofacContainer1));
var builder2 = new ContainerBuilder();
var b = new B();
builder2.RegisterInstance(b);
var autofacContainer2 = builder2.Build();
var exportProvider2 = new ContainerExportProvider(new AutofacContainerAdapter(autofacContainer2));
var catalog = new TypeCatalog(typeof(C));
var compositionContainer = new CompositionContainer(catalog, exportProvider1, exportProvider2);
var instance = compositionContainer.GetExport<C>();
Assert.IsNotNull(instance.Value);
Assert.AreEqual(a, instance.Value.ThingA, "Instance of A is the same as that registered with the DI container.");
Assert.AreEqual(b, instance.Value.ThingB, "Instance of B is the same as that registered with the DI container.");
}
public void MefCanResolveTypesRegisteredInAutofacAfterTrackingExtensionIsAddedTest()
{
// Setup
var builder = new ContainerBuilder();
builder.RegisterType<AutofacOnlyComponent2>().Named<IAutofacOnlyComponent>("autofacComponent2");
var autofacContainer = builder.Build();
// Further setup
var adapter = new AutofacContainerAdapter(autofacContainer);
var provider = new ContainerExportProvider(adapter);
var assemblyCatalog = new AssemblyCatalog(Assembly.GetExecutingAssembly());
var container = new CompositionContainer(assemblyCatalog, provider);
var component = container.GetExportedValue<IAutofacOnlyComponent>("autofacComponent2");
Assert.That(component, Is.Not.Null);
Assert.That(component.GetType(), Is.EqualTo(typeof(AutofacOnlyComponent2)));
}
public void MefCanResolveTypesRegisteredInUnityAfterTrackingExtensionIsAddedTest()
{
// Setup
var unityContainer = new UnityContainer();
// Enable tracking
TypeRegistrationTrackerExtension.RegisterIfMissing(unityContainer);
// Registration
unityContainer.RegisterType<IUnityOnlyComponent, UnityOnlyComponent2>("unityComponent2");
// Further setup
var adapter = new UnityContainerAdapter(unityContainer);
var provider = new ContainerExportProvider(adapter);
var assemblyCatalog = new AssemblyCatalog(Assembly.GetExecutingAssembly());
var container = new CompositionContainer(assemblyCatalog, provider);
var component = container.GetExportedValue<IUnityOnlyComponent>("unityComponent2");
Assert.That(component, Is.Not.Null);
Assert.That(component.GetType(), Is.EqualTo(typeof(UnityOnlyComponent2)));
}
public void MefCannotResolveTypesRegisteredInUnityBeforeTrackingExtensionIsAddedTest()
{
// Setup
var unityContainer = new UnityContainer();
// Registration
unityContainer.RegisterType<IUnityOnlyComponent, UnityOnlyComponent2>("unityComponent2");
// Further setup
var adapter = new UnityContainerAdapter(unityContainer);
var provider = new ContainerExportProvider(adapter);
var assemblyCatalog = new AssemblyCatalog(Assembly.GetExecutingAssembly());
var container = new CompositionContainer(assemblyCatalog, provider);
Assert.That(delegate
{
container.GetExportedValue<IUnityOnlyComponent>("unityComponent2");
}, Throws.TypeOf<ImportCardinalityMismatchException>());
}
