public async Task StaticFactoryMethodCanCreateMEFPart()
{
var discoverer = new AttributedPartDiscovery(Resolver.DefaultInstance, isNonPublicSupported: true);
var someOtherExportPart = discoverer.CreatePart(typeof(SomeOtherExport));
var staticFactoryPart = discoverer.CreatePart(typeof(MEFPartWithStaticFactoryMethod));
var staticFactoryMethodRef = MethodRef.Get(typeof(MEFPartWithStaticFactoryMethod).GetTypeInfo().DeclaredMethods.Single(m => m.Name == nameof(MEFPartWithStaticFactoryMethod.Create)), Resolver.DefaultInstance);
staticFactoryPart = new ComposablePartDefinition(
staticFactoryPart.TypeRef,
staticFactoryPart.Metadata,
staticFactoryPart.ExportedTypes,
staticFactoryPart.ExportingMembers,
staticFactoryPart.ImportingMembers,
staticFactoryPart.SharingBoundary,
staticFactoryPart.OnImportsSatisfiedRef,
staticFactoryMethodRef,
staticFactoryPart.ImportingConstructorImports.Take(1).ToList(),
staticFactoryPart.CreationPolicy,
staticFactoryPart.IsSharingBoundaryInferred);
var catalog = ComposableCatalog.Create(Resolver.DefaultInstance)
.AddParts(new[] { someOtherExportPart, staticFactoryPart });
var configuration = CompositionConfiguration.Create(catalog);
if (!configuration.CompositionErrors.IsEmpty)
{
foreach (var error in configuration.CompositionErrors.Peek())
{
this.logger.WriteLine(error.Message);
}
configuration.ThrowOnErrors();
}
var container = await configuration.CreateContainerAsync(this.logger);
SomeOtherExport anotherExport = container.GetExportedValue <SomeOtherExport>();
MEFPartWithStaticFactoryMethod mefPart = container.GetExportedValue <MEFPartWithStaticFactoryMethod>();
Assert.NotNull(mefPart.SomeOtherExport);
Assert.Same(anotherExport, mefPart.SomeOtherExport);
Assert.True(mefPart.AnotherRandomValue);
}
public static MEFPartWithStaticFactoryMethod Create(SomeOtherExport someOtherExport)
{
return(new MEFPartWithStaticFactoryMethod(someOtherExport, true));
}
[ImportingConstructor] // This is so we can 'transfer' it to the static factory method in the test.
private MEFPartWithStaticFactoryMethod(SomeOtherExport someOtherExport, bool anotherRandomValue)
{
this.SomeOtherExport = someOtherExport;
this.AnotherRandomValue = anotherRandomValue;
}
