XMLStreamException, FactoryConfigurationError, ODataException {
AtomEntityProvider ser = createAtomEntityProvider();
EntityProviderWriteProperties properties = EntityProviderWriteProperties.serviceRoot(BASE_URI).build();
employeeData.put("EmployeeName", null);
ODataResponse response =
ser.writeEntry(MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Employees"), employeeData,
properties);
String xmlString = verifyResponse(response);
assertXpathExists("/a:entry/a:title", xmlString);
assertXpathEvaluatesTo("", "/a:entry/a:title", xmlString);