registration.add(TestServiceImpl)
        } as Action)

        expect:
        registry.get(ServiceWithDependency).service == registry.get(TestServiceImpl)
    }

    def usesFactoryMethodOnProviderToCreateServiceInstance() {
        def registry = new DefaultServiceRegistry()
        registry.addProvider(new TestProvider())

        expect:
        registry.get(Integer) == 12
        registry.get(Number) == 12