### Question:
EnergyModeller { public void setEnergyPredictor(String energyPredictor) { try { if (!energyPredictor.startsWith(DEFAULT_PREDICTOR_PACKAGE)) { energyPredictor = DEFAULT_PREDICTOR_PACKAGE + "." + energyPredictor; } predictor = (EnergyPredictorInterface) (Class.forName(energyPredictor).newInstance()); } catch (ClassNotFoundException ex) { if (predictor == null) { predictor = new CpuOnlyEnergyPredictor(); } Logger.getLogger(EnergyModeller.class.getName()).log(Level.WARNING, "The energy predictor specified was not found"); } catch (InstantiationException | IllegalAccessException ex) { if (predictor == null) { predictor = new CpuOnlyEnergyPredictor(); } Logger.getLogger(EnergyModeller.class.getName()).log(Level.WARNING, "The energy predictor did not work", ex); } } EnergyModeller();  EnergyModeller(boolean performDataGathering);  EnergyModeller(HostDataSource datasource, DatabaseConnector database); static void main(String[] args); static EnergyModeller getInstance(); void setEnergyPredictor(String energyPredictor); void setDataSource(String dataSource); void setCurrentEnergyDivisionRule(String divisionRule); void setHistoricEnergyDivisionRule(String divisionRule); void setConsiderIdleEnergyCurrentVm(boolean considerIdleEnergy); HistoricUsageRecord getEnergyRecordForVM(VmDeployed vm, TimePeriod timePeriod); HashSet<HistoricUsageRecord> getEnergyRecordForVM(Collection<VmDeployed> vms, TimePeriod timePeriod); HashSet<HistoricUsageRecord> getEnergyRecordForDeployment(String deploymentId, TimePeriod timePeriod); HistoricUsageRecord getEnergyRecordForHost(Host host, TimePeriod timePeriod); HashSet<HistoricUsageRecord> getEnergyRecordForHost(Collection<Host> hosts, TimePeriod timePeriod); CurrentUsageRecord getCurrentEnergyForVM(VmDeployed vm); HashSet<CurrentUsageRecord> getCurrentEnergyForVM(Collection<VmDeployed> vms); CurrentUsageRecord getCurrentEnergyForHost(Host host); CurrentUsageRecord getCurrentGeneralPowerConsumerOverhead(); HashSet<CurrentUsageRecord> getCurrentEnergyForHost(Collection<Host> hosts); EnergyUsagePrediction getPredictedEnergyForVM(VM vmImage, Collection<VM> vMsOnHost, Host host); EnergyUsagePrediction getPredictedEnergyForVM(VM vmImage, Collection<VM> vMsOnHost, Host host, TimePeriod duration); EnergyUsagePrediction getPredictedEnergyForVMTransfer(VmDeployed vm, Host destination, TimePeriod duration); EnergyUsagePrediction getHostPredictedEnergy(Host host, Collection<VM> virtualMachines); EnergyUsagePrediction getHostPredictedEnergy(Host host, Collection<VM> virtualMachines, TimePeriod duration); Collection<Host> getHost(Collection<String> hostname); Host getHost(String hostname); Collection<Host> getHostList(); List<Host> getHostList(Comparator<Host> sort); static VM getVM(int cpuCount, int ramMb, int diskGb); static Collection<VM> getVMs(OvfDefinition deploymentOVF); ArrayList<VmDeployed> getVMsOnHost(Host host); VmDeployed getVM(String name); VmDeployed getVM(int vmId); void setVMProfileData(VmDeployed vm); double getVmTotalCurrentPowerConsumption(); double getHostsTotalCurrentPowerConsumption(); double getVMToHostPowerRatio(); double getHostPowerUnallocatedToVMs(); void calibrateModelForHost(Collection<Host> hosts); void calibrateModelForHost(Host host); void stop();  }### Answer:
@Test public void testSetEnergyPredictor() { System.out.println("setEnergyPredictor"); String energyPredictor = "DefaultEnergyPredictor"; EnergyModeller instance2 = new EnergyModeller(); instance2.setEnergyPredictor(energyPredictor); }