Add comprehensive tests for AddressPartService

src/main/java/org/openelisglobal/address/dao/AddressPartDAO.java

@@ -17,4 +17,5 @@
 import org.openelisglobal.common.dao.BaseDAO;
 
 public interface AddressPartDAO extends BaseDAO<AddressPart, String> {
+    AddressPart getById(String id);
 }

src/main/java/org/openelisglobal/address/daoimpl/AddressPartDAOImpl.java

@@ -26,4 +26,8 @@ public class AddressPartDAOImpl extends BaseDAOImpl<AddressPart, String> impleme
     public AddressPartDAOImpl() {
         super(AddressPart.class);
     }
+    @Override
+    public AddressPart getById(String id) {
+        return entityManager.find(AddressPart.class, id);
+    }
 }

src/main/java/org/openelisglobal/address/service/AddressPartService.java

@@ -8,4 +8,5 @@ public interface AddressPartService extends BaseObjectService<AddressPart, Strin
     List<AddressPart> getAll();
 
     AddressPart getAddresPartByName(String name);
+    AddressPart getAddresPartById(String id);
 }

src/main/java/org/openelisglobal/address/service/AddressPartServiceImpl.java

@@ -27,4 +27,9 @@ protected AddressPartDAO getBaseObjectDAO() {
     public AddressPart getAddresPartByName(String name) {
         return getMatch("partName", name).orElse(null);
     }
+
+    @Override
+    public AddressPart getAddresPartById(String id) {
+    return baseObjectDAO.getById(id);
+    }
 }

src/test/java/org/openelisglobal/address/AddressPartServiceTest.java

@@ -8,6 +8,7 @@
 import org.openelisglobal.address.service.AddressPartService;
 import org.openelisglobal.address.valueholder.AddressPart;
 import org.springframework.beans.factory.annotation.Autowired;
+import java.util.List;
 
 public class AddressPartServiceTest extends BaseWebContextSensitiveTest {
 
@@ -103,4 +104,84 @@ public void getAddressPartByNam_shouldReturnAddressPartByName() throws Exception
 
         Assert.assertEquals("022", part.getDisplayOrder());
     }
+
+    @Test(expected = Exception.class)
+public void saveAddressPart_withEmptyPartName_shouldThrowException() throws Exception {
+    AddressPart part = new AddressPart();
+    part.setPartName(""); 
+    part.setDisplayOrder("001");
+
+    partService.save(part);
+}
+
+@Test(expected = Exception.class)
+public void saveDuplicateAddressPart_shouldThrowException() throws Exception {
+    AddressPart part1 = new AddressPart();
+    part1.setPartName("DuplicatePartName");
+    part1.setDisplayOrder("001");
+
+    AddressPart part2 = new AddressPart();
+    part2.setPartName("DuplicatePartName");
+    part2.setDisplayOrder("002");
+
+    partService.save(part1);
+    partService.save(part2); 
+}
+
+@Test
+public void getAddressPartByName_withNonExistentName_shouldReturnNull() throws Exception {
+    AddressPart part = partService.getAddresPartByName("NonExistentName");
+
+    Assert.assertNull(part);
+}
+
+@Test
+public void getAll_whenNoPartsExist_shouldReturnEmptyList() throws Exception {
+    List<AddressPart> parts = partService.getAll();
+
+    Assert.assertTrue(parts.isEmpty());
+}
+
+@Test
+public void deleteNonExistentAddressPart_shouldNotThrowException() throws Exception {
+    AddressPart part = new AddressPart();
+    part.setId("NonExistentId");
+
+    partService.delete(part);
+
+    Assert.assertEquals(0, partService.getAll().size()); 
+}
+
+@Test(expected = Exception.class)
+public void saveAddressPart_withInvalidDisplayOrder_shouldThrowException() throws Exception {
+    AddressPart part = new AddressPart();
+    part.setPartName("ValidName");
+    part.setDisplayOrder("InvalidOrder");
+
+    partService.save(part);
+}
+
+@Test
+public void saveAddressPart_withNullOptionalFields_shouldSaveSuccessfully() throws Exception {
+    AddressPart part = new AddressPart();
+    part.setPartName("NameOnly"); 
+
+    partService.save(part);
+
+    AddressPart savedPart = partService.get(part.getId());
+    Assert.assertEquals("NameOnly", savedPart.getPartName());
+    Assert.assertNull(savedPart.getDisplayOrder()); 
+}
+
+@Test
+public void saveAddressPart_withLongPartName_shouldSaveSuccessfully() throws Exception {
+    AddressPart part = new AddressPart();
+    part.setPartName("A".repeat(255)); 
+    part.setDisplayOrder("001");
+
+    partService.save(part);
+
+    AddressPart savedPart = partService.get(part.getId());
+    Assert.assertEquals("A".repeat(255), savedPart.getPartName());
+}
 }