def moduleRegistry = Mock(ModuleRegistry) {
        getModule(_) >> { args -> module(args[0]) }
    }
    def pluginModuleRegistry = Mock(PluginModuleRegistry) {
        getImplementationModules() >> []
    }

    def "uses plugins and extension plugins to determine gradle extensions classpath"() {
        given:
        def provider = new DynamicModulesClassPathProvider(moduleRegistry, pluginModuleRegistry)

    /**
     * Plugin modules exposed in the Gradle API.
     */
    Set<Module> getApiModules();

    /**
     * Plugin modules exposed to the Gradle runtime only.
     */
    Set<Module> getImplementationModules();

    public Set<Module> getApiModules() {
        Properties properties = loadPluginProperties("/gradle-plugins.properties");
        return loadModules(properties);
    }

    @Override
    public Set<Module> getImplementationModules() {
        Properties properties = loadPluginProperties("/gradle-implementation-plugins.properties");
        return loadModules(properties);
    }

    private Set<Module> loadModules(Properties properties) {

        }
        for (Module pluginModule : pluginModuleRegistry.getApiModules()) {
            classpath = classpath.plus(pluginModule.getClasspath());
        }
        for (Module pluginModule : pluginModuleRegistry.getImplementationModules()) {
            classpath = classpath.plus(pluginModule.getClasspath());
        }
        return removeJaxbIfIncludedInCurrentJdk(classpath);
    }