@Test
public void testHappy() throws Exception {

    // SETUP
    final PeriodTypeDto periodType = PeriodTypeDto.DAILY;
    final PeriodicMeterReadsRequestDto request = new PeriodicMeterReadsRequestDto(periodType, new Date(this.from),
            new Date(this.to));
    // SETUP - dlms objects
    final DlmsObject dlmsClock = new DlmsClock("0.0.1.0.0.255");
    final DlmsCaptureObject captureObject1 = new DlmsCaptureObject(dlmsClock, 2);
    final DlmsObject activeEnergyImportRate1 = new DlmsObject(DlmsObjectType.ACTIVE_ENERGY_IMPORT_RATE_1, 0,
            "1.0.1.8.1.255");
    final DlmsCaptureObject captureObject2 = new DlmsCaptureObject(activeEnergyImportRate1, 2);
    final DlmsObject activeEnergyImportRate2 = new DlmsObject(DlmsObjectType.ACTIVE_ENERGY_IMPORT_RATE_2, 0,
            "1.0.1.8.2.255");
    final DlmsCaptureObject captureObject3 = new DlmsCaptureObject(activeEnergyImportRate2, 2);
    final DlmsObject activeEnergyExportRate1 = new DlmsObject(DlmsObjectType.ACTIVE_ENERGY_EXPORT_RATE_1, 0,
            "1.0.2.8.1.255");
    final DlmsCaptureObject captureObject4 = new DlmsCaptureObject(activeEnergyExportRate1, 2);
    final DlmsObject activeEnergyExportRate2 = new DlmsObject(DlmsObjectType.ACTIVE_ENERGY_EXPORT_RATE_2, 0,
            "1.0.2.8.2.255");
    final DlmsCaptureObject captureObject5 = new DlmsCaptureObject(activeEnergyExportRate2, 2);
    final List<DlmsCaptureObject> captureObjects = Arrays.asList(captureObject1, captureObject2, captureObject3,
            captureObject4, captureObject5);
    final DlmsProfile dlmsProfile = new DlmsProfile(DlmsObjectType.DAILY_LOAD_PROFILE, "1.0.99.2.0.255",
            captureObjects, ProfileCaptureTime.DAY, Medium.ELECTRICITY);
    // SETUP - mock dlms object config to return attribute addresses
    final AttributeAddressForProfile attributeAddressForProfile = this.createAttributeAddressForProfile(dlmsProfile,
            captureObjects);
    final AttributeAddress attributeAddress = this.createAttributeAddress(dlmsProfile);
    when(this.dlmsObjectConfigService.findAttributeAddressForProfile(eq(this.device),
            eq(DlmsObjectType.DAILY_LOAD_PROFILE), eq(0), eq(this.fromDateTime), eq(this.toDateTime),
            eq(Medium.ELECTRICITY))).thenReturn(Optional.of(attributeAddressForProfile));
    final DlmsObject intervalTime = mock(DlmsObject.class);
    when(this.dlmsObjectConfigService.findDlmsObject(any(Protocol.class), any(DlmsObjectType.class),
            any(Medium.class))).thenReturn(Optional.of(intervalTime));
    // SETUP - mock dlms helper to return data objects on request
    final DataObject data0 = mock(DataObject.class);
    // make sure to set logTime on first dataObject
    final List<DataObject> bufferedObjectValue = new ArrayList<>();
    when(data0.getValue()).thenReturn(bufferedObjectValue);
    final DataObject data1 = mock(DataObject.class);
    when(data1.isNumber()).thenReturn(true);
    final DataObject data2 = mock(DataObject.class);
    final DataObject data3 = mock(DataObject.class);
    final DataObject data4 = mock(DataObject.class);
    final DataObject data5 = mock(DataObject.class);
    final DataObject bufferedObject1 = mock(DataObject.class);
    when(bufferedObject1.getValue()).thenReturn(asList(data0, data1, data2, data3, data4, data5));
    final DataObject bufferedObject2 = mock(DataObject.class);
    when(bufferedObject2.getValue()).thenReturn(asList(data0, data1, data2, data3, data4, data5));
    final DataObject resultData = mock(DataObject.class);
    when(resultData.getValue()).thenReturn(Arrays.asList(bufferedObject1, bufferedObject2));
    final String expectedDescription = "retrieve periodic meter reads for " + periodType;
    final GetResult result0 = mock(GetResult.class);
    final GetResult result1 = mock(GetResult.class);
    final GetResult result2 = mock(GetResult.class);
    final GetResult result3 = mock(GetResult.class);
    final GetResult result4 = mock(GetResult.class);
    final GetResult result5 = mock(GetResult.class);
    final GetResult getResult = mock(GetResult.class);
    when(this.dlmsHelper.getAndCheck(this.connectionManager, this.device, expectedDescription, attributeAddress))
            .thenReturn(asList(result0, result1, result2, result3, result4, result5));
    when(this.dlmsHelper.readDataObject(result0, PERIODIC_E_METER_READS)).thenReturn(resultData);
    when(this.dlmsHelper.getAndCheck(eq(this.connectionManager), eq(this.device), eq(expectedDescription),
            eq(attributeAddressForProfile.getAttributeAddress()))).thenReturn(Collections.singletonList(getResult));
    when(this.dlmsHelper.getAndCheck(this.connectionManager, this.device, expectedDescription, attributeAddress))
            .thenReturn(Collections.singletonList(getResult));
    when(this.dlmsHelper.readDataObject(eq(getResult), any(String.class))).thenReturn(resultData);
    final CosemDateTimeDto cosemDateTime = mock(CosemDateTimeDto.class);
    final String expectedDateTimeDescription = String.format("Clock from %s buffer", periodType);
    when(this.dlmsHelper.readDateTime(data0, expectedDateTimeDescription)).thenReturn(cosemDateTime);
    final DateTime bufferedDateTime = DateTime.now();
    when(cosemDateTime.asDateTime()).thenReturn(bufferedDateTime);
    // CALL
    final PeriodicMeterReadsResponseDto result = this.executor.execute(this.connectionManager, this.device,
            request);
    // VERIFY calls to mocks
    verify(this.dlmsMessageListener).setDescription(
            String.format("GetPeriodicMeterReads DAILY from %s until %s, retrieve attribute: {%s,%s,%s}",
                    new DateTime(this.from), new DateTime(this.to), dlmsProfile.getClassId(),
                    dlmsProfile.getObisCode(), dlmsProfile.getDefaultAttributeId()));
    verify(this.dlmsHelper, times(2)).validateBufferedDateTime(same(bufferedDateTime),
            argThat(new DateTimeMatcher(this.from)), argThat(new DateTimeMatcher(this.to)));
    verify(this.dlmsObjectConfigService).findDlmsObject(any(Protocol.class), any(DlmsObjectType.class),
            any(Medium.class));
    // ASSERT - the result should contain 2 values
    final List<PeriodicMeterReadsResponseItemDto> periodicMeterReads = result.getPeriodicMeterReads();
    assertThat(periodicMeterReads.size()).isEqualTo(2);
    periodicMeterReads.forEach(p -> {
        assertThat(p.getLogTime()).isNotNull();
    });
}