1 * classLoader2.loadClass('org.gradle.ImplClass3') >> StringBuffer
    }

    def "findFactory() returns null when no service meta data resource available"() {
        when:
        def result = serviceLocator.findFactory(String.class)

        then:
        result == null
        1 * classLoader.getResources("META-INF/services/java.lang.String") >> Collections.enumeration([])

            }
            Class<?> implementationClass = implementationType.getConcreteClass();
            ImplementationFactory<S, ?> factory = findFactory(implementationClass);
            if (factory == null) {
                throw new IllegalArgumentException(String.format("No factory registered to create an instance of implementation class '%s'.", implementationType));