}
        }, WebConfigService.class.getCanonicalName());

        assertTrue(crawlingConfigHelper.getPipeline("W1").isEmpty());
    }

    @Test
    public void test_getPipeline_withEmptyStringPipeline() {
        // Register service that returns empty string pipeline
        ComponentUtil.register(new WebConfigService() {
            @Override

    //                                                                           Attribute
    //                                                                           =========
    @Resource
    private WebConfigService webConfigService;
    @Resource
    private ScheduledJobService scheduledJobService;
    @Resource
    private WebConfigPager webConfigPager;
    @Resource
    private RoleTypeService roleTypeService;
    @Resource

        ComponentUtil.register(new WebConfigService() {
            @Override
            public OptionalEntity<WebConfig> getWebConfig(final String id) {
                final WebConfig webConfig = new WebConfig();
                webConfig.setId(id);
                return OptionalEntity.of(webConfig);
            }
        }, WebConfigService.class.getCanonicalName());
    }

    @Test