def extendsNumberFactory = registry.get(extendsNumberFactoryType)
        extendsNumberFactory.create() == BigDecimal.valueOf(2)
    }

    def usesAFactoryServiceToCreateInstances() {
        expect:
        registry.newInstance(BigDecimal) == BigDecimal.valueOf(0)
        registry.newInstance(BigDecimal) == BigDecimal.valueOf(1)