给这个方法添加单元测试： public String cloneMessage(CisMonitorData data){ log.info("Starting process to clone and publish message to queue for request id {}", data.getTdsStpId()); CisPubTds cisPubTds = monitorDao.getTdsPubRequestById(data.getTdsStpId()); if(cisPubTds == null){ return CisTStpConstants.MSG_1; } if(cisPubTds.getMessage() == null){ return CisTStpConstants.MSG_2; } if(data.getUser() == null){ return CisTStpConstants.MSG_18; } if(data.getComment() != null && data.getComment().length() > 250){ return CisTStpConstants.MSG_19; } String status = null; try { CisPubTds clonePubTds = (CisPubTds)cisPubTds.clone(); clonePubTds.setTdsStpId(null); clonePubTds.setCreatedDate(new Date()); clonePubTds.setCreatedBy(data.getUser()); clonePubTds.setIsStpEd(0); clonePubTds.setStpEdAt(null); clonePubTds.setUserComment(data.getComment()); clonePubTds = monitorDao.saveOrUpdatePubTds(clonePubTds); if(clonePubTds != null && clonePubTds.getTdsStpId() != null && clonePubTds.getTdsStpId() > 0) { log.info("Updating the XML message for cloned request with new TDS STP id : {}", clonePubTds.getTdsStpId()); /Update tracking ID in SCBML message and save it to database/ Document doc = DocumentUtility.StringToDocument(clonePubTds.getMessage()); DocumentUtility.updateNodeValue(doc, clonePubTds.getTdsStpId()); String updatedXml = DocumentUtility.DocumentToString(doc); clonePubTds.setMessage(updatedXml); clonePubTds = monitorDao.saveOrUpdatePubTds(clonePubTds); /End/ log.info("Update of the XML message for cloned request with new TDS STP id : {} is completed", clonePubTds.getTdsStpId()); log.info("Publishing the cloned message"); boolean statusBool = publish(clonePubTds); if(statusBool){ status = CisTStpConstants.MSG_SUCCESS; } log.info("End of publish with statusBool : {}", statusBool); log.info("End of publish with status : {}", status); }else { status = CisTStpConstants.MSG_8; } log.info("End process to clone and publish message to queue for request id {}", data.getTdsStpId()); } catch (CloneNotSupportedException e) { status = CisTStpConstants.MSG_7; log.error("Error while cloning the object {}", e); } catch (Exception e) { log.error("Error while creating object {}", e); } return status; }

Sure, here's an example of how you can write unit tests for the given method using JUnit:

import org.junit.Test;
import static org.junit.Assert.*;
import static org.mockito.Mockito.*;
import java.util.Date;

public class ExampleUnitTest {

  private MonitorDao monitorDao = mock(MonitorDao.class);
  private ExampleClass exampleClass = new ExampleClass(monitorDao);

  @Test
  public void testCloneMessage() throws Exception {
    // Arrange
    CisMonitorData data = new CisMonitorData();
    data.setTdsStpId(123);
    data.setUser("Test User");
    data.setComment("Test Comment");

    CisPubTds cisPubTds = new CisPubTds();
    cisPubTds.setTdsStpId(123);
    cisPubTds.setMessage("Test Message");

    when(monitorDao.getTdsPubRequestById(123)).thenReturn(cisPubTds);

    // Act
    String result = exampleClass.cloneMessage(data);

    // Assert
    assertEquals(CisTStpConstants.MSG_SUCCESS, result);
  }
}

In this example, we are using Mockito to mock the `MonitorDao` object. We create a `CisMonitorData` object and set its properties. We also create a `CisPubTds` object and set its properties. We then use the `when` method to mock the `getTdsPubRequestById` method of the `monitorDao` object to return the `cisPubTds` object when called with argument `123`. We then call the `cloneMessage` method of `ExampleClass` with the `data` object as argument and store the result in the `result` variable. Finally, we use the `assertEquals` method to assert that the result is equal to `CisTStpConstants.MSG_SUCCESS`.

You can write similar tests for other scenarios, such as when `monitorDao.getTdsPubRequestById` returns null, or when `data.getUser` is null, etc.