### Question:
ElectronicIdListConverter { public List<StaffIdentificationCode> convert(ElectronicIdList electronicIdList) { if (electronicIdList == null) { return null; } return toSliStaffIdentificationCodeList(electronicIdList.getElectronicIds()); }  List<StaffIdentificationCode> convert(ElectronicIdList electronicIdList);  }### Answer:
@Test public void testNullObject() { List<StaffIdentificationCode> result = converter.convert((ElectronicIdList) null); Assert.assertNull("StaffIdentificationCode list should be null", result); result = converter.convert((ElectronicIdList) null); Assert.assertNull("StaffIdentificationCode list should be null", result); }
@Test public void testEmptyElectronicIdList() { ElectronicIdList list = new ElectronicIdList(); list.setElectronicIds(new ElectronicId[0]); List<StaffIdentificationCode> result = converter.convert(list); Assert.assertEquals(0, result.size()); }
@Test public void testEmptyElectronicId4ElectronicIdList() { ElectronicIdList list = new ElectronicIdList(); ElectronicId original = new ElectronicId(); list.add(original); List<StaffIdentificationCode> result = converter.convert(list); Assert.assertEquals(1, result.size()); StaffIdentificationCode it = result.get(0); Assert.assertEquals(original.getValue(), it.getID()); Assert.assertEquals("Other", it.getIdentificationSystem()); }
@Test public void testMappings() { map.clear(); map.put(ElectronicIdType.BARCODE, "Other"); map.put(ElectronicIdType.MAGSTRIPE, "Other"); map.put(ElectronicIdType.PIN, "PIN"); map.put(ElectronicIdType.RFID, "Other"); ElectronicIdList list = getElectronicIdList(); List<StaffIdentificationCode> results = converter.convert(list); Assert.assertEquals(list.size(), results.size()); int newCounter = 0; for (StaffIdentificationCode it : results) { Assert.assertNotNull(it); ElectronicId original = list.get(newCounter++); testMapping(original, it); } ElectronicIdList list2 = getElectronicIdList(); List<StaffIdentificationCode> results2 = converter.convert(list2); Assert.assertEquals(list2.size(), results2.size()); newCounter = 0; for (StaffIdentificationCode it : results2) { Assert.assertNotNull(it); ElectronicId original = list2.get(newCounter++); testMapping(original, it); } }