### Question:
ReferenceDto implements Serializable { protected byte[] marshall() { return serialize(); }   @JsonProperty("filename") public String m_fileName; @JsonProperty("creation_time") public long m_creationTime; @JsonProperty("type") public int m_refType; @JsonProperty("label") public String m_refLabel; @JsonProperty("battery_realtime") public long m_refBatteryRealtime; @JsonProperty("battery_level") public int m_refBatteryLevel; @JsonProperty("battery_voltage") public int m_refBatteryVoltage; @JsonProperty("partial_wakelocks") public ArrayList<WakelockDto> m_refWakelocks; @JsonProperty("kernel_wakelocks") public ArrayList<NativeKernelWakelockDto> m_refKernelWakelocks; @JsonProperty("network_stats") public ArrayList<NetworkUsageDto> m_refNetworkStats; @JsonProperty("alarms") public ArrayList<AlarmDto> m_refAlarms; @JsonProperty("processes") public ArrayList<ProcessDto> m_refProcesses; @JsonProperty("other_stats") public ArrayList<MiscDto> m_refOther; @JsonProperty("cpu_states") public ArrayList<StateDto> m_refCpuStates; @JsonProperty("sensor_usage") public ArrayList<SensorUsageDto> m_refSensorUsage; }### Answer:
@Test public void test_marshall_empty() throws Exception { ReferenceDto dto = new ReferenceDto(); byte[] dtoBytes = dto.marshall(); assertTrue(dtoBytes.length > 0); }