### Question:
RuleCapabilitiesServiceImpl implements RuleCapabilitiesService { @Override public void scanNow(final ContainerSpecKey containerSpecKey) { ServerTemplate serverTemplate = templateStorage.load(containerSpecKey.getServerTemplateKey().getId()); if (serverTemplate == null) { throw new KieServerControllerIllegalArgumentException("No server template found for id " + containerSpecKey.getServerTemplateKey().getId()); } ContainerSpec containerSpec = serverTemplate.getContainerSpec(containerSpecKey.getId()); if (containerSpec == null) { throw new KieServerControllerIllegalArgumentException("No container spec found for id " + containerSpecKey.getId()); } List<Container> containers = kieServerInstanceManager.scanNow(serverTemplate, containerSpec); notificationService.notify(serverTemplate, containerSpec, containers); }  @Override void scanNow(final ContainerSpecKey containerSpecKey); @Override void startScanner(final ContainerSpecKey containerSpecKey,
                             final Long interval); @Override void stopScanner(final ContainerSpecKey containerSpecKey); @Override void upgradeContainer(final ContainerSpecKey containerSpecKey,
                                 ReleaseId releaseId); KieServerTemplateStorage getTemplateStorage(); void setTemplateStorage(KieServerTemplateStorage templateStorage); KieServerInstanceManager getKieServerInstanceManager(); void setKieServerInstanceManager(KieServerInstanceManager kieServerInstanceManager); NotificationService getNotificationService(); void setNotificationService(NotificationService notificationService);  }### Answer:
@Test public void testScanNow() { List<Container> fakeResult = new ArrayList<Container>(); fakeResult.add(container); when(kieServerInstanceManager.scanNow(any(ServerTemplate.class), any(ContainerSpec.class))).thenReturn(fakeResult); ruleCapabilitiesService.scanNow(containerSpec); verify(kieServerInstanceManager, times(1)).scanNow(any(ServerTemplate.class), any(ContainerSpec.class)); }