public void CreateDefaultServiceProviderShouldFindTypesInAllKnownAssemblies()
        {
            // Given a default ExtensionServiceProvider
            // Then we should not find exports from a test assembly
            ExtensionServiceProvider serviceProvider = ExtensionServiceProvider.CreateDefaultServiceProvider();

            Assert.Empty(serviceProvider.GetServices <MyExportType>());

            // But should find exports that are defined in the main assembly
            Assert.NotEmpty(serviceProvider.GetServices <ASTNodeFormatterFactory>());
        }