public void DontExportICompositionServiceFromChildImportShouldShouldThrowCompositionException()
{
var rootCatalog = new TypeCatalog(typeof(FromRoot));
var childCatalog = new TypeCatalog(typeof(ClassRequiresICompositionService), typeof(ClassOptionallyImportsICompositionService));
CompositionScopeDefinition scope = rootCatalog.AsScope(childCatalog.AsScope());
var container = new CompositionContainer(scope);
Assert.Throws <ImportCardinalityMismatchException>(() =>
{
FromRoot fromRoot = container.GetExportedValue <FromRoot>();
Assert.Null(fromRoot);
});
}
public void ExportICompositionServiceFromChildImportShouldShouldSucceed()
{
var childCatalog = new TypeCatalog(typeof(ClassRequiresICompositionService), typeof(ClassOptionallyImportsICompositionService));
var rootCatalog = new TypeCatalog(typeof(FromRoot));
CompositionScopeDefinition scope = rootCatalog.AsScope(childCatalog.AsScope());
var container = new CompositionContainer(scope, CompositionOptions.ExportCompositionService);
FromRoot fromRoot = container.GetExportedValue <FromRoot>();
ExportLifetimeContext <ClassRequiresICompositionService> requiredService = fromRoot.Required.CreateExport();
Assert.NotNull(requiredService.Value.CompositionService);
ExportLifetimeContext <ClassOptionallyImportsICompositionService> optionalService = fromRoot.Optional.CreateExport();
Assert.NotNull(optionalService.Value.CompositionService);
}
