### Question:
StraceDiagnosticManager { public void disableMicroserviceStraceDiagnostics(String microserviceUuid) { LoggingService.logDebug(MODULE_NAME, "Disabling microservice strace diagnostics for miroservice : " + microserviceUuid); getStraceDataByMicroserviceUuid(microserviceUuid).ifPresent(microserviceStraceData -> { microserviceStraceData.setStraceRun(false); this.monitoringMicroservices.remove(microserviceStraceData); }); } private  StraceDiagnosticManager(); static StraceDiagnosticManager getInstance(); List<MicroserviceStraceData> getMonitoringMicroservices(); void updateMonitoringMicroservices(JsonObject diagnosticData); void enableMicroserviceStraceDiagnostics(String microserviceUuid); void disableMicroserviceStraceDiagnostics(String microserviceUuid);  }### Answer:
@Test public void testDisableMicroserviceStraceDiagnosticsWhenMicroserviceUuidIsNull() { straceDiagnosticManager.disableMicroserviceStraceDiagnostics(null); PowerMockito.verifyStatic(LoggingService.class); LoggingService.logDebug(MODULE_NAME, "Disabling microservice strace diagnostics for miroservice : null"); }