here is Note.hbm.xml file

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
	"-//Hibernate/Hibernate Mapping DTD 3.1//EN"
	"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="org.openmrs.module.patientnotes">

	<class name="Note" table="note">

			<id name="id" type="int" column="id" unsaved-value="0">
			<generator class="native" />
			</id>

			<property name="voided" type="java.lang.Boolean" column="is_voided" not-null="true" length="1" />

			<property name="dateVoided" type="java.util.Date" column="date_voided" not-null="true" length="19" />

			<many-to-one name="voided_By" class="org.openmrs.User" not-null="true" />

			<property name="voidReason" type="java.lang.String"
			 column="void_reason" length="255" />

	</class>

</hibernate-mapping>
private Boolean voided = Boolean.FALSE;

	private Date dateVoided;

	private User voidedBy;

	private String voidReason;



public Boolean getVoided() {
		return voided;
	}

	public void setVoided(Boolean voided) {
		this.voided = voided;
	}

	public Date getDateVoided() {
		return dateVoided;
	}

	public void setDateVoided(Date dateVoided) {
		this.dateVoided = dateVoided;
	}

	public User getVoidedBy() {
		return voidedBy;
	}

	public void setVoidedBy(User voidedBy) {
		this.voidedBy = voidedBy;
	}

	public String getVoidReason() {
		return voidReason;
	}



and finnaly in HibernateNoteDAO.java

	log.info("voiding note because " + reason);
		return (Note) sessionFactory.getCurrentSession().get(Note.class, note);
	}





I have  written the test case that is yet failing till now

that is

package org.openmrs.api.db;

import static org.junit.Assert.*;

import org.junit.Ignore;
import org.junit.Test;
import org.openmrs.PersonName;
import org.openmrs.notification.Note;
import org.openmrs.test.BaseContextSensitiveTest;
import org.openmrs.test.Verifies;

public class NoteDAOTest extends BaseContextSensitiveTest{

	private NoteDAO dao = null;
	@Test
	public void voidNote_shouldvoidNote() throws Exception {
		Note note = new Note();
		String reason = null;
		assertEquals(dao.voidNote(note, reason), note.getVoided());
	}

}

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added code in