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+/*******************************************************************************
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ 
******************************************************************************/
+package org.apache.olingo.odata2.client.core.ep.serializer;
+
+import static org.custommonkey.xmlunit.XMLAssert.assertXpathExists;
+import static org.custommonkey.xmlunit.XMLAssert.assertXpathNotExists;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URI;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.olingo.odata2.api.edm.Edm;
+import org.apache.olingo.odata2.api.edm.EdmEntitySet;
+import org.apache.olingo.odata2.api.edm.EdmFacets;
+import org.apache.olingo.odata2.api.edm.EdmProperty;
+import org.apache.olingo.odata2.api.edm.EdmTyped;
+import org.apache.olingo.odata2.api.ep.EntityProviderException;
+import org.apache.olingo.odata2.api.processor.ODataResponse;
+import org.apache.olingo.odata2.api.uri.info.GetEntitySetUriInfo;
+import org.apache.olingo.odata2.client.api.ep.Entity;
+import org.apache.olingo.odata2.client.api.ep.EntityCollection;
+import 
org.apache.olingo.odata2.client.api.ep.EntityCollectionSerializerProperties;
+import org.apache.olingo.odata2.client.api.ep.EntitySerializerProperties;
+import org.apache.olingo.odata2.client.core.ep.AbstractProviderTest;
+import org.apache.olingo.odata2.client.core.ep.AtomSerializerDeserializer;
+import org.apache.olingo.odata2.testutil.helper.StringHelper;
+import org.apache.olingo.odata2.testutil.mock.MockFacade;
+import org.custommonkey.xmlunit.exceptions.XpathException;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.xml.sax.SAXException;
+
+/**
+ *  
+ */
+public class AtomFeedSerializerTest extends AbstractProviderTest {
+  @Rule
+  public ExpectedException expectedEx = ExpectedException.none();
+
+  private String employeeXPathString = 
"/a:entry/a:link[@href=\"Rooms('1')/nr_Employees\" and @title='nr_Employees']";
+
+  private static final String EXP_MSG = "Write properties are mandatory for 
XML.";
+  private static final String ERROR_MSG = "Entity or expanded entity cannot 
have null value.";
+  
+  public AtomFeedSerializerTest(final StreamWriterImplType type) {
+    super(type);
+  }
+
+  private GetEntitySetUriInfo view;
+
+  @Before
+  public void before() throws Exception {
+    initializeRoomData(1);
+
+    view = mock(GetEntitySetUriInfo.class);
+
+    EdmEntitySet set = 
MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Rooms");
+    when(view.getTargetEntitySet()).thenReturn(set);
+  }
+
+  @Test
+  public void entityWithInlineFeed() throws Exception {
+    Entity roomData = new Entity();
+    roomData.addProperty("Id", "1");
+    roomData.addProperty("Name", "Neu Schwanstein");
+    roomData.addProperty("Seats", new Integer(20));
+    EntityCollection listData = new EntityCollection();
+    EntitySerializerProperties properties =
+        EntitySerializerProperties.serviceRoot(BASE_URI)
+            .includeMetadata(true).build();
+    Entity data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("EmployeeName", "EmpName1");
+    data.addProperty("RoomId", "1");
+    listData.addEntity(data);
+    data.setWriteProperties(properties);
+
+    data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("RoomId", "1");
+    data.setWriteProperties(properties);
+    listData.addEntity(data);
+    EntityCollectionSerializerProperties inlineProperties =
+        EntityCollectionSerializerProperties.serviceRoot(BASE_URI).build();
+
+    listData.setCollectionProperties(inlineProperties);
+    AtomSerializerDeserializer provider = createAtomEntityProvider();
+    roomData.addNavigation("nr_Employees", listData);
+    roomData.setWriteProperties(properties);
+    ODataResponse response =
+        
provider.writeEntry(MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Rooms"),
 roomData);
+
+    String xmlString = verifyResponse(response);
+    assertXpathNotExists("/a:entry/m:properties", xmlString);
+    assertXpathExists("/a:entry/a:link", xmlString);
+    verifyEmployees(employeeXPathString, xmlString);
+  }
+
+  public void entityWithPartialInlineFeed() throws Exception {
+    expectedEx.expect(EntityProviderException.class);
+    expectedEx.expectMessage("Entity or expanded entity cannot have null 
value.");
+    Entity roomData = new Entity();
+    roomData.addProperty("Id", "1");
+    roomData.addProperty("Name", "Neu Schwanstein");
+    roomData.addProperty("Seats", new Integer(20));
+    EntityCollection listData = new EntityCollection();
+    EntitySerializerProperties properties =
+        EntitySerializerProperties.serviceRoot(BASE_URI)
+            .includeMetadata(true).build();
+    Entity data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("EmployeeName", "EmpName1");
+    data.addProperty("RoomId", "1");
+    listData.addEntity(data);
+    data.setWriteProperties(properties);
+
+    data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("RoomId", "1");
+    data.setWriteProperties(properties);
+    listData.addEntity(data);
+
+    data = new Entity();
+    data.setWriteProperties(properties);
+    listData.addEntity(data);
+    EntityCollectionSerializerProperties inlineProperties =
+        EntityCollectionSerializerProperties.serviceRoot(BASE_URI).build();
+
+    listData.setCollectionProperties(inlineProperties);
+    AtomSerializerDeserializer provider = createAtomEntityProvider();
+    roomData.addNavigation("nr_Employees", listData);
+    roomData.setWriteProperties(properties);
+    ODataResponse response =
+        
provider.writeEntry(MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Rooms"),
 roomData);
+
+    String xmlString = verifyResponse(response);
+    assertXpathNotExists("/a:entry/m:properties", xmlString);
+    assertXpathExists("/a:entry/a:link", xmlString);
+    verifyEmployees(employeeXPathString, xmlString);
+  }
+
+  public void entityWithPartialNullInlineFeed() throws Exception {
+    expectedEx.expect(EntityProviderException.class);
+    expectedEx.expectMessage("Entity or expanded entity cannot have null 
value.");
+    Entity roomData = new Entity();
+    roomData.addProperty("Id", "1");
+    roomData.addProperty("Name", "Neu Schwanstein");
+    roomData.addProperty("Seats", new Integer(20));
+    EntityCollection listData = new EntityCollection();
+    EntitySerializerProperties properties =
+        EntitySerializerProperties.serviceRoot(BASE_URI).build();
+    Entity data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("EmployeeName", "EmpName1");
+    data.addProperty("RoomId", "1");
+    listData.addEntity(data);
+    data.setWriteProperties(properties);
+
+    data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("RoomId", "1");
+    data.setWriteProperties(properties);
+    listData.addEntity(data);
+
+    listData.addEntity(null);
+    EntityCollectionSerializerProperties inlineProperties =
+        EntityCollectionSerializerProperties.serviceRoot(BASE_URI).build();
+
+    listData.setCollectionProperties(inlineProperties);
+    AtomSerializerDeserializer provider = createAtomEntityProvider();
+    roomData.addNavigation("nr_Employees", listData);
+    roomData.setWriteProperties(properties);
+    ODataResponse response =
+        
provider.writeEntry(MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Rooms"),
 roomData);
+
+    String xmlString = verifyResponse(response);
+    assertXpathNotExists("/a:entry/m:properties", xmlString);
+    assertXpathExists("/a:entry/a:link", xmlString);
+    verifyEmployees(employeeXPathString, xmlString);
+  }
+
+  @Test(expected = EntityProviderException.class)
+  public void entityWithoutIdInlineFeed() throws Exception {
+    Entity roomData = new Entity();
+    roomData.addProperty("Id", "1");
+    roomData.addProperty("Name", "Neu Schwanstein");
+    roomData.addProperty("Seats", new Integer(20));
+    EntityCollection listData = new EntityCollection();
+    EntitySerializerProperties properties =
+        EntitySerializerProperties.serviceRoot(BASE_URI)
+            .includeMetadata(true).build();
+    Entity data = new Entity();
+    data.addProperty("EmployeeName", "EmpName1");
+    data.addProperty("RoomId", "1");
+    listData.addEntity(data);
+    data.setWriteProperties(properties);
+    listData.addEntity(data);
+    EntityCollectionSerializerProperties inlineProperties =
+        EntityCollectionSerializerProperties.serviceRoot(BASE_URI)
+            .build();
+    listData.setCollectionProperties(inlineProperties);
+    AtomSerializerDeserializer provider = createAtomEntityProvider();
+    roomData.addNavigation("nr_Employees", listData);
+    roomData.setWriteProperties(properties);
+    ODataResponse response =
+        
provider.writeEntry(MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Rooms"),
 roomData);
+
+    String xmlString = verifyResponse(response);
+    assertXpathNotExists("/a:entry/m:properties", xmlString);
+    assertXpathExists("/a:entry/a:link", xmlString);
+    verifyEmployees(employeeXPathString, xmlString);
+  }
+
+  @Test
+  public void entityWithEmptyFeed() throws Exception {
+    Entity roomData = new Entity();
+    roomData.addProperty("Id", "1");
+    roomData.addProperty("Name", "Neu Schwanstein");
+    roomData.addProperty("Seats", new Integer(20));
+    EntityCollection listData = new EntityCollection();
+    EntitySerializerProperties properties =
+        EntitySerializerProperties.serviceRoot(BASE_URI)
+            .includeMetadata(true).build();
+
+    AtomSerializerDeserializer provider = createAtomEntityProvider();
+    roomData.addNavigation("nr_Employees", listData);
+    roomData.setWriteProperties(properties);
+    ODataResponse response =
+        
provider.writeEntry(MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Rooms"),
 roomData);
+
+    String xmlString = verifyResponse(response);
+    assertXpathNotExists("/a:entry/m:properties", xmlString);
+    assertXpathExists("/a:entry/a:link", xmlString);
+  }
+
+  @Test
+  public void entityWithEmptyEntityInFeed() throws Exception {
+    Entity roomData = new Entity();
+    roomData.addProperty("Id", "1");
+    roomData.addProperty("Name", "Neu Schwanstein");
+    roomData.addProperty("Seats", new Integer(20));
+    EntityCollection listData = new EntityCollection();
+    EntitySerializerProperties properties =
+        
EntitySerializerProperties.serviceRoot(BASE_URI).includeMetadata(false).build();
+    Entity data = new Entity();
+    data.setWriteProperties(properties);
+    listData.addEntity(data);
+    EntityCollectionSerializerProperties inlineProperties =
+        EntityCollectionSerializerProperties.serviceRoot(BASE_URI).build();
+    listData.setCollectionProperties(inlineProperties);
+    AtomSerializerDeserializer provider = createAtomEntityProvider();
+    roomData.addNavigation("nr_Employees", listData);
+    roomData.setWriteProperties(properties);
+    ODataResponse response =
+        
provider.writeEntry(MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Rooms"),
 roomData);
+
+    String xmlString = verifyResponse(response);
+    assertXpathNotExists("/a:entry/m:properties", xmlString);
+    assertXpathExists("/a:entry/a:link", xmlString);
+    assertXpathExists(employeeXPathString, xmlString);
+    assertXpathExists(employeeXPathString + "/m:inline", xmlString);
+
+    assertXpathExists(employeeXPathString + "/m:inline/a:feed[@xml:base='" + 
BASE_URI + "']", xmlString);
+    assertXpathExists(employeeXPathString + "/m:inline/a:feed/a:entry", 
xmlString);
+  }
+
+  @Test(expected = EntityProviderException.class)
+  public void entityWithNullFeed() throws Exception {
+    Entity roomData = new Entity();
+    roomData.addProperty("Id", "1");
+    roomData.addProperty("Name", "Neu Schwanstein");
+    roomData.addProperty("Seats", new Integer(20));
+
+    EntitySerializerProperties properties =
+        EntitySerializerProperties.serviceRoot(BASE_URI).build();
+
+    AtomSerializerDeserializer provider = createAtomEntityProvider();
+    roomData.addNavigation("nr_Employees", null);
+    roomData.setWriteProperties(properties);
+    ODataResponse response =
+        
provider.writeEntry(MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Rooms"),
 roomData);
+
+    String xmlString = verifyResponse(response);
+    assertXpathNotExists("/a:entry/m:properties", xmlString);
+    assertXpathExists("/a:entry/a:link", xmlString);
+  }
+
+  @Test(expected = EntityProviderException.class)
+  public void entityWithNullEntityInFeed() throws Exception {
+    Entity roomData = new Entity();
+    roomData.addProperty("Id", "1");
+    roomData.addProperty("Name", "Neu Schwanstein");
+    roomData.addProperty("Seats", new Integer(20));
+
+    EntitySerializerProperties properties =
+        EntitySerializerProperties.serviceRoot(BASE_URI).build();
+    EntityCollection listData = new EntityCollection();
+    listData.addEntity(null);
+    AtomSerializerDeserializer provider = createAtomEntityProvider();
+    roomData.addNavigation("nr_Employees", listData);
+    roomData.setWriteProperties(properties);
+    ODataResponse response =
+        
provider.writeEntry(MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Rooms"),
 roomData);
+
+    String xmlString = verifyResponse(response);
+    assertXpathNotExists("/a:entry/m:properties", xmlString);
+    assertXpathExists("/a:entry/a:link", xmlString);
+  }
+
+  @Test
+  public void entityWithoutInlineEntityProperty() throws Exception {
+    Entity roomData = new Entity();
+    roomData.addProperty("Id", "1");
+    roomData.addProperty("Name", "Neu Schwanstein");
+    roomData.addProperty("Seats", new Integer(20));
+    EntityCollection listData = new EntityCollection();
+    EntitySerializerProperties properties =
+        EntitySerializerProperties.serviceRoot(BASE_URI)
+            .includeMetadata(true).build();
+    Entity data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("EmployeeName", "EmpName1");
+    data.addProperty("RoomId", "1");
+    listData.addEntity(data);
+
+    data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("RoomId", "1");
+    listData.addEntity(data);
+    listData.setGlobalEntityProperties(properties);
+    EntityCollectionSerializerProperties inlineProperties =
+        EntityCollectionSerializerProperties.serviceRoot(BASE_URI).build();
+    listData.setCollectionProperties(inlineProperties);
+    AtomSerializerDeserializer provider = createAtomEntityProvider();
+    roomData.addNavigation("nr_Employees", listData);
+    roomData.setWriteProperties(properties);
+    ODataResponse response =
+        
provider.writeEntry(MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Rooms"),
 roomData);
+
+    String xmlString = verifyResponse(response);
+    assertXpathNotExists("/a:entry/m:properties", xmlString);
+    assertXpathExists("/a:entry/a:link", xmlString);
+    verifyEmployees(employeeXPathString, xmlString);
+  }
+
+  @Test
+  public void entityWithoutInlineCollectionProperty() throws Exception {
+    Entity roomData = new Entity();
+    roomData.addProperty("Id", "1");
+    roomData.addProperty("Name", "Neu Schwanstein");
+    roomData.addProperty("Seats", new Integer(20));
+    EntityCollection listData = new EntityCollection();
+    EntitySerializerProperties properties =
+        EntitySerializerProperties.serviceRoot(BASE_URI)
+            .includeMetadata(true).build();
+    Entity data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("EmployeeName", "EmpName1");
+    data.addProperty("RoomId", "1");
+    data.setWriteProperties(properties);
+    listData.addEntity(data);
+
+    data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("RoomId", "1");
+    data.setWriteProperties(properties);
+    listData.addEntity(data);
+    AtomSerializerDeserializer provider = createAtomEntityProvider();
+    roomData.addNavigation("nr_Employees", listData);
+    roomData.setWriteProperties(properties);
+    ODataResponse response =
+        
provider.writeEntry(MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Rooms"),
 roomData);
+
+    String xmlString = verifyResponse(response);
+    assertXpathNotExists("/a:entry/m:properties", xmlString);
+    assertXpathExists("/a:entry/a:link", xmlString);
+    verifyEmployees(employeeXPathString, xmlString);
+  }
+
+  @Test
+  public void entityWithoutPropertyInlineFeed() throws Exception {
+    Entity roomData = new Entity();
+    roomData.addProperty("Id", "1");
+    roomData.addProperty("Name", "Neu Schwanstein");
+    roomData.addProperty("Seats", new Integer(20));
+    EntityCollection listData = new EntityCollection();
+    EntitySerializerProperties properties =
+        EntitySerializerProperties.serviceRoot(BASE_URI)
+            .includeMetadata(false).build();
+    Entity data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("EmployeeName", "EmpName1");
+    data.addProperty("RoomId", "1");
+    listData.addEntity(data);
+
+    data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("RoomId", "1");
+    listData.setGlobalEntityProperties(properties);
+    listData.addEntity(data);
+    AtomSerializerDeserializer provider = createAtomEntityProvider();
+    roomData.addNavigation("nr_Employees", listData);
+    roomData.setWriteProperties(properties);
+    ODataResponse response =
+        
provider.writeEntry(MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Rooms"),
 roomData);
+
+    String xmlString = verifyResponse(response);
+    assertXpathNotExists("/a:entry/m:properties", xmlString);
+    assertXpathExists("/a:entry/a:link", xmlString);
+    verifyEmployeesContent(employeeXPathString, xmlString);
+  }
+
+  @Test
+  public void entityWithPropertyAtCollectionForInlineFeed() throws Exception {
+    Entity roomData = new Entity();
+    roomData.addProperty("Id", "1");
+    roomData.addProperty("Name", "Neu Schwanstein");
+    roomData.addProperty("Seats", new Integer(20));
+    EntityCollection listData = new EntityCollection();
+    EntitySerializerProperties properties =
+        EntitySerializerProperties.serviceRoot(BASE_URI)
+            .includeMetadata(false).build();
+    Entity data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("EmployeeName", "EmpName1");
+    data.addProperty("RoomId", "1");
+    listData.addEntity(data);
+
+    data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("RoomId", "1");
+    listData.addEntity(data);
+    AtomSerializerDeserializer provider = createAtomEntityProvider();
+    roomData.addNavigation("nr_Employees", listData);
+    roomData.setWriteProperties(properties);
+    ODataResponse response =
+        
provider.writeEntry(MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Rooms"),
 roomData);
+
+    String xmlString = verifyResponse(response);
+    assertXpathNotExists("/a:entry/m:properties", xmlString);
+    assertXpathExists("/a:entry/a:link", xmlString);
+
+    verifyEmployeesContent(employeeXPathString, xmlString);
+  }
+
+  @Test
+  public void entityWithTwoPropertyInlineFeed() throws Exception {
+    Entity roomData = new Entity();
+    roomData.addProperty("Id", "1");
+    roomData.addProperty("Name", "Neu Schwanstein");
+    roomData.addProperty("Seats", new Integer(20));
+    EntityCollection listData = new EntityCollection();
+    EntitySerializerProperties properties =
+        EntitySerializerProperties.serviceRoot(BASE_URI)
+            .includeMetadata(true).build();
+    URI COLL_URI = new URI("http://host:80/service/collection/";);
+    EntityCollectionSerializerProperties collProperties =
+        EntityCollectionSerializerProperties.serviceRoot(COLL_URI).build();
+    listData.setCollectionProperties(collProperties);
+    listData.setGlobalEntityProperties(properties);
+    Entity data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("EmployeeName", "EmpName1");
+    data.addProperty("RoomId", "1");
+    listData.addEntity(data);
+
+    data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("RoomId", "1");
+
+    listData.addEntity(data);
+    AtomSerializerDeserializer provider = createAtomEntityProvider();
+    roomData.addNavigation("nr_Employees", listData);
+    roomData.setWriteProperties(properties);
+    ODataResponse response =
+        
provider.writeEntry(MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Rooms"),
 roomData);
+
+    String xmlString = verifyResponse(response);
+    assertXpathNotExists("/a:entry/m:properties", xmlString);
+    assertXpathExists("/a:entry/a:link", xmlString);
+    verifyEmployeesForCollection(employeeXPathString, xmlString, COLL_URI);
+  }
+
+  private void verifyEmployees(final String path, final String xmlString) 
throws XpathException, IOException,
+      SAXException {
+    assertXpathExists(path, xmlString);
+    assertXpathExists(path + "/m:inline", xmlString);
+
+    assertXpathExists(path + "/m:inline/a:feed[@xml:base='" + BASE_URI + "']", 
xmlString);
+    assertXpathExists(path + "/m:inline/a:feed/a:entry", xmlString);
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/a:id", xmlString);
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/a:title", xmlString);
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/a:updated", xmlString);
+
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/a:category", xmlString);
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/a:link", xmlString);
+
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/a:content", xmlString);
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/m:properties", 
xmlString);
+    assertXpathExists(path + 
"/m:inline/a:feed/a:entry/m:properties/d:EmployeeId", xmlString);
+    assertXpathExists(path + 
"/m:inline/a:feed/a:entry/m:properties/d:EmployeeName", xmlString);
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/m:properties/d:RoomId", 
xmlString);
+
+    assertXpathExists("/a:entry/a:content/m:properties/d:Id", xmlString);
+    assertXpathExists("/a:entry/a:content/m:properties/d:Name", xmlString);
+    assertXpathExists("/a:entry/a:content/m:properties/d:Seats", xmlString);
+
+  }
+
+  private void verifyEmployeesContent(final String path, final String 
xmlString) throws XpathException, IOException,
+      SAXException {
+    assertXpathExists(path, xmlString);
+    assertXpathExists(path + "/m:inline", xmlString);
+
+    assertXpathExists(path + "/m:inline/a:feed[@xml:base='" + BASE_URI + "']", 
xmlString);
+    assertXpathExists(path + "/m:inline/a:feed/a:entry", xmlString);
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/m:properties", 
xmlString);
+    assertXpathExists(path + 
"/m:inline/a:feed/a:entry/m:properties/d:EmployeeId", xmlString);
+    assertXpathExists(path + 
"/m:inline/a:feed/a:entry/m:properties/d:EmployeeName", xmlString);
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/m:properties/d:RoomId", 
xmlString);
+
+    assertXpathExists("/a:entry/a:content/m:properties/d:Id", xmlString);
+    assertXpathExists("/a:entry/a:content/m:properties/d:Name", xmlString);
+    assertXpathExists("/a:entry/a:content/m:properties/d:Seats", xmlString);
+
+  }
+
+  private void verifyEmployeesForCollection(final String path, final String 
xmlString, URI coll_uri)
+      throws XpathException, IOException,
+      SAXException {
+    assertXpathExists(path, xmlString);
+    assertXpathExists(path + "/m:inline", xmlString);
+
+    assertXpathExists(path + "/m:inline/a:feed[@xml:base='" + coll_uri + "']", 
xmlString);
+    assertXpathExists(path + "/m:inline/a:feed/a:entry", xmlString);
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/a:id", xmlString);
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/a:title", xmlString);
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/a:updated", xmlString);
+
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/a:category", xmlString);
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/a:link", xmlString);
+
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/a:content", xmlString);
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/m:properties", 
xmlString);
+    assertXpathExists(path + 
"/m:inline/a:feed/a:entry/m:properties/d:EmployeeId", xmlString);
+    assertXpathExists(path + 
"/m:inline/a:feed/a:entry/m:properties/d:EmployeeName", xmlString);
+    assertXpathExists(path + "/m:inline/a:feed/a:entry/m:properties/d:RoomId", 
xmlString);
+
+    assertXpathExists("/a:entry/a:content/m:properties/d:Id", xmlString);
+    assertXpathExists("/a:entry/a:content/m:properties/d:Name", xmlString);
+    assertXpathExists("/a:entry/a:content/m:properties/d:Seats", xmlString);
+
+  }
+
+  private String verifyResponse(final ODataResponse response) throws 
IOException {
+    assertNotNull(response);
+    assertNotNull(response.getEntity());
+    assertNull("EntityProvider should not set content header", 
response.getContentHeader());
+    String xmlString = StringHelper.inputStreamToString((InputStream) 
response.getEntity());
+    return xmlString;
+  }
+
+  @Test
+  public void feed() throws Exception {
+    final EdmEntitySet entitySet = 
MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Teams");
+    EntityCollection teamsData = new EntityCollection();
+    Entity team1Data = new Entity();
+    team1Data.addProperty("Id", "1");
+    team1Data.addProperty("isScrumTeam", true);
+    Entity team2Data = new Entity();
+    team2Data.addProperty("Id", "2");
+    team2Data.addProperty("isScrumTeam", false);
+    teamsData.addEntity(team1Data);
+    teamsData.addEntity(team2Data);
+    
teamsData.setCollectionProperties(EntityCollectionSerializerProperties.serviceRoot(BASE_URI).build());
+
+    final ODataResponse response = new 
AtomSerializerDeserializer().writeFeed(entitySet, teamsData);
+    assertNotNull(response);
+    assertNotNull(response.getEntity());
+    assertNull("EntitypProvider must not set content header", 
response.getContentHeader());
+
+    final String xmlString = verifyResponse(response);
+    assertNotNull(xmlString);
+    assertXpathExists("/a:feed", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties/d:Id", 
xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties/d:isScrumTeam", 
xmlString);    
+  }
+  
+  @Test
+  public void feedWithEmptyData() throws Exception {
+    final EdmEntitySet entitySet = 
MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Teams");
+    EntityCollection teamsData = new EntityCollection();
+    Entity team1Data = new Entity();
+    team1Data.addProperty("Id", "1");
+    team1Data.addProperty("isScrumTeam", true);
+    Entity team2Data = new Entity();
+    teamsData.addEntity(team1Data);
+    teamsData.addEntity(team2Data);
+    
teamsData.setCollectionProperties(EntityCollectionSerializerProperties.serviceRoot(BASE_URI).build());
+
+    final ODataResponse response = new 
AtomSerializerDeserializer().writeFeed(entitySet, teamsData);
+    assertNotNull(response);
+    assertNotNull(response.getEntity());
+    assertNull("EntitypProvider must not set content header", 
response.getContentHeader());
+
+    final String xmlString = verifyResponse(response);
+    assertNotNull(xmlString);
+    assertTrue(xmlString.contains("<entry><content type=\"application/xml\">"
+        + 
"<m:properties><d:Id>1</d:Id><d:isScrumTeam>true</d:isScrumTeam></m:properties>"
+        + "</content></entry>"));
+    assertTrue(xmlString.contains("<entry><content 
type=\"application/xml\"/></entry>"));
+  }
+  
+  @Test
+  public void feedWithNullData() throws Exception {
+    final EdmEntitySet entitySet = 
MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Teams");
+    
+    try {
+      new AtomSerializerDeserializer().writeFeed(entitySet, null);
+    } catch (EntityProviderException e) {
+      assertEquals(ERROR_MSG, e.getMessage());
+    }
+  }
+  
+  @Test
+  public void feedWithMetadata() throws Exception {
+    final EdmEntitySet entitySet = 
MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Teams");
+    EntityCollection teamsData = new EntityCollection();
+    Entity team1Data = new Entity();
+    team1Data.addProperty("Id", "1");
+    team1Data.addProperty("isScrumTeam", true);
+    
team1Data.setWriteProperties(EntitySerializerProperties.serviceRoot(BASE_URI).includeMetadata(true).build());
+    Entity team2Data = new Entity();
+    team2Data.addProperty("Id", "2");
+    team2Data.addProperty("isScrumTeam", false);
+    
team2Data.setWriteProperties(EntitySerializerProperties.serviceRoot(BASE_URI).includeMetadata(true).build());
+    teamsData.addEntity(team1Data);
+    teamsData.addEntity(team2Data);
+    
teamsData.setCollectionProperties(EntityCollectionSerializerProperties.serviceRoot(BASE_URI).build());
+
+    final ODataResponse response = new 
AtomSerializerDeserializer().writeFeed(entitySet, teamsData);
+    assertNotNull(response);
+    assertNotNull(response.getEntity());
+    assertNull("EntitypProvider must not set content header", 
response.getContentHeader());
+
+    final String xmlString = StringHelper.inputStreamToString((InputStream) 
response.getEntity());
+    assertNotNull(xmlString);
+    assertXpathExists("/a:feed", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:id", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties/d:Id", 
xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties/d:isScrumTeam", 
xmlString);
+  }
+  
+  @Test
+  public void feedWithGlobalEntityProperties() throws Exception {
+    final EdmEntitySet entitySet = 
MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Teams");
+    EntityCollection teamsData = new EntityCollection();
+    Entity team1Data = new Entity();
+    team1Data.addProperty("Id", "1");
+    team1Data.addProperty("isScrumTeam", true);
+    Entity team2Data = new Entity();
+    team2Data.addProperty("Id", "2");
+    team2Data.addProperty("isScrumTeam", false);
+    teamsData.addEntity(team1Data);
+    teamsData.addEntity(team2Data);
+    
teamsData.setCollectionProperties(EntityCollectionSerializerProperties.serviceRoot(BASE_URI).build());
+    
teamsData.setGlobalEntityProperties(EntitySerializerProperties.serviceRoot(BASE_URI).
+        includeMetadata(true).build());
+    
+    final ODataResponse response = new 
AtomSerializerDeserializer().writeFeed(entitySet, teamsData);
+    final String xmlString = StringHelper.inputStreamToString((InputStream) 
response.getEntity());
+    assertNotNull(xmlString);
+    assertXpathExists("/a:feed", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:id", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties/d:Id", 
xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties/d:isScrumTeam", 
xmlString);
+  }
+  
+  @Test
+  public void feedWithoutCollectionProperties() throws Exception {
+    final EdmEntitySet entitySet = 
MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Teams");
+    EntityCollection teamsData = new EntityCollection();
+    Entity team1Data = new Entity();
+    team1Data.addProperty("Id", "1");
+    team1Data.addProperty("isScrumTeam", true);
+    
team1Data.setWriteProperties(EntitySerializerProperties.serviceRoot(BASE_URI).
+        includeMetadata(true).build());
+    Entity team2Data = new Entity();
+    team2Data.addProperty("Id", "2");
+    team2Data.addProperty("isScrumTeam", false);
+    
team2Data.setWriteProperties(EntitySerializerProperties.serviceRoot(BASE_URI).
+        includeMetadata(true).build());
+    teamsData.addEntity(team1Data);
+    teamsData.addEntity(team2Data);
+    
+    try {
+      new AtomSerializerDeserializer().writeFeed(entitySet, teamsData);
+    } catch (EntityProviderException e) {
+      assertEquals(EXP_MSG, e.getMessage());
+    }
+  }
+  
+  @Test
+  public void unbalancedPropertyFeedWithInlineFeed() throws Exception {
+    Edm edm = MockFacade.getMockEdm();
+    EdmTyped imageUrlProperty = edm.getEntityType("RefScenario", 
"Employee").getProperty("ImageUrl");
+    EdmFacets facets = mock(EdmFacets.class);
+    when(facets.getMaxLength()).thenReturn(1);
+    when(((EdmProperty) imageUrlProperty).getFacets()).thenReturn(facets);
+
+    EntityCollection roomsData = new EntityCollection();
+    Entity room1Data = new Entity();
+    room1Data.addProperty("Id", "1");
+    room1Data.addProperty("Name", "Neu Schwanstein");
+    room1Data.addProperty("Seats", new Integer(20));
+    
room1Data.setWriteProperties(EntitySerializerProperties.serviceRoot(BASE_URI).
+        validatingFacets(true).build());
+    
+    EntityCollection innerData = new EntityCollection();
+    Entity data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("EmployeeName", "EmpName1");
+    data.addProperty("RoomId", "1");
+    innerData.addEntity(data);
+    
+    data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("RoomId", "1");
+    innerData.addEntity(data);
+    
+    room1Data.addNavigation("nr_Employees", innerData);
+    roomsData.addEntity(room1Data);
+    
+    Entity room2Data = new Entity();
+    room2Data.addProperty("Id", "2");
+    room2Data.addProperty("Name", "John");
+    room2Data.addProperty("Seats", new Integer(10));
+    
room2Data.setWriteProperties(EntitySerializerProperties.serviceRoot(BASE_URI).
+        validatingFacets(true).build());
+    
+    innerData = new EntityCollection();
+    data = new Entity();
+    data.addProperty("EmployeeId", "2");
+    data.addProperty("EmployeeName", "EmpName2");
+    data.addProperty("RoomId", "2");
+    innerData.addEntity(data);
+    
+    data = new Entity();
+    data.addProperty("EmployeeId", "2");
+    data.addProperty("RoomId", "2");
+    innerData.addEntity(data);
+    
+    room2Data.addNavigation("nr_Employees", innerData);
+    roomsData.addEntity(room2Data);
+    
+    EdmEntitySet entitySet = 
edm.getDefaultEntityContainer().getEntitySet("Rooms");
+    
roomsData.setCollectionProperties(EntityCollectionSerializerProperties.serviceRoot(BASE_URI).build());
+    final ODataResponse response =
+        new AtomSerializerDeserializer().writeFeed(entitySet, roomsData);
+    final String xmlString = StringHelper.inputStreamToString((InputStream) 
response.getEntity());
+    assertNotNull(xmlString);
+    verifyRoomsFeedWithInlineEmployeeFeed(xmlString, BASE_URI);
+  }
+  
+  private void verifyRoomsFeedWithInlineEmployeeFeed(final String xmlString, 
URI coll_uri)
+      throws XpathException, IOException,
+      SAXException {
+    assertXpathExists("/a:feed[@xml:base='" + coll_uri + "']", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:link/m:inline", xmlString);
+
+    assertXpathExists("/a:feed/a:entry/a:link/m:inline/a:feed[@xml:base='" + 
coll_uri + "']", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:link/m:inline/a:feed/a:entry", 
xmlString);
+    
assertXpathExists("/a:feed/a:entry/a:link/m:inline/a:feed/a:entry/m:properties/d:EmployeeId",
 xmlString);
+    
assertXpathExists("/a:feed/a:entry/a:link/m:inline/a:feed/a:entry/m:properties/d:RoomId",
 xmlString);
+
+    assertXpathExists("/a:feed/a:entry/a:content", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties/d:Id", 
xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties/d:Name", 
xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties/d:Seats", 
xmlString);
+
+  }
+  
+  @Test
+  public void unbalancedPropertyFeedWithInlineFeedAndNavigationLink() throws 
Exception {
+    Edm edm = MockFacade.getMockEdm();
+    EdmTyped imageUrlProperty = edm.getEntityType("RefScenario", 
"Employee").getProperty("ImageUrl");
+    EdmFacets facets = mock(EdmFacets.class);
+    when(facets.getMaxLength()).thenReturn(1);
+    when(((EdmProperty) imageUrlProperty).getFacets()).thenReturn(facets);
+
+    EntityCollection roomsData = new EntityCollection();
+    Entity room1Data = new Entity();
+    room1Data.addProperty("Id", "1");
+    room1Data.addProperty("Name", "Neu Schwanstein");
+    room1Data.addProperty("Seats", new Integer(20));
+    
room1Data.setWriteProperties(EntitySerializerProperties.serviceRoot(BASE_URI).
+        validatingFacets(true).build());
+    
+    EntityCollection innerData = new EntityCollection();
+    Entity data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("EmployeeName", "EmpName1");
+    data.addProperty("RoomId", "1");
+    innerData.addEntity(data);
+    
+    data = new Entity();
+    data.addProperty("EmployeeId", "1");
+    data.addProperty("RoomId", "1");
+    innerData.addEntity(data);
+    
+    room1Data.addNavigation("nr_Employees", innerData);
+    Map<String, Object> link1 = new HashMap<String, Object>();
+    link1.put("Id", 1);
+    room1Data.addNavigation("nr_Building", link1);
+    roomsData.addEntity(room1Data);
+    
+    Entity room2Data = new Entity();
+    room2Data.addProperty("Id", "2");
+    room2Data.addProperty("Name", "John");
+    room2Data.addProperty("Seats", new Integer(10));
+    
room2Data.setWriteProperties(EntitySerializerProperties.serviceRoot(BASE_URI).
+        validatingFacets(true).build());
+    
+    innerData = new EntityCollection();
+    data = new Entity();
+    data.addProperty("EmployeeId", "2");
+    data.addProperty("EmployeeName", "EmpName2");
+    data.addProperty("RoomId", "2");
+    innerData.addEntity(data);
+    
+    data = new Entity();
+    data.addProperty("EmployeeId", "2");
+    data.addProperty("RoomId", "2");
+    innerData.addEntity(data);
+    
+    room2Data.addNavigation("nr_Employees", innerData);
+    Map<String, Object> link2 = new HashMap<String, Object>();
+    link2.put("Id", 2);
+    room2Data.addNavigation("nr_Building", link2);
+    roomsData.addEntity(room2Data);
+    
roomsData.setCollectionProperties(EntityCollectionSerializerProperties.serviceRoot(BASE_URI).build());
+    
+    EdmEntitySet entitySet = 
edm.getDefaultEntityContainer().getEntitySet("Rooms");
+    final ODataResponse response =
+        new AtomSerializerDeserializer().writeFeed(entitySet, roomsData);
+    
+    final String xmlString = StringHelper.inputStreamToString((InputStream) 
response.getEntity());
+    assertNotNull(xmlString);
+    verifyRoomsFeedWithInlineEmployeeFeedWithNavigationLinks(xmlString, 
BASE_URI);
+  }
+
+  @Test
+  public void 
unbalancedPropertyFeedWithInlineFeedAndNavigationLinkWithoutKey() throws 
Exception {
+    Edm edm = MockFacade.getMockEdm();
+    EdmTyped imageUrlProperty = edm.getEntityType("RefScenario", 
"Employee").getProperty("ImageUrl");
+    EdmFacets facets = mock(EdmFacets.class);
+    when(facets.getMaxLength()).thenReturn(1);
+    when(((EdmProperty) imageUrlProperty).getFacets()).thenReturn(facets);
+
+    EntityCollection roomsData = new EntityCollection();
+    Entity room1Data = new Entity();
+    room1Data.addProperty("Name", "Neu Schwanstein");
+    room1Data.addProperty("Seats", new Integer(20));
+    
room1Data.setWriteProperties(EntitySerializerProperties.serviceRoot(BASE_URI).
+        validatingFacets(false).isKeyAutoGenerated(true).build());
+    
+    EntityCollection innerData = new EntityCollection();
+    Entity data = new Entity();
+    data.addProperty("EmployeeName", "EmpName1");
+    data.addProperty("RoomId", "1");
+    innerData.addEntity(data);
+    
+    data = new Entity();
+    data.addProperty("RoomId", "1");
+    innerData.addEntity(data);
+    
+    room1Data.addNavigation("nr_Employees", innerData);
+    Map<String, Object> link1 = new HashMap<String, Object>();
+    link1.put("Id", 1);
+    room1Data.addNavigation("nr_Building", link1);
+    roomsData.addEntity(room1Data);
+    
+    Entity room2Data = new Entity();
+    room2Data.addProperty("Name", "John");
+    room2Data.addProperty("Seats", new Integer(10));
+    
room2Data.setWriteProperties(EntitySerializerProperties.serviceRoot(BASE_URI).
+        validatingFacets(false).isKeyAutoGenerated(true).build());
+    
+    innerData = new EntityCollection();
+    data = new Entity();
+    data.addProperty("EmployeeName", "EmpName2");
+    data.addProperty("RoomId", "2");
+    innerData.addEntity(data);
+    
+    data = new Entity();
+    data.addProperty("RoomId", "2");
+    innerData.addEntity(data);
+    
+    room2Data.addNavigation("nr_Employees", innerData);
+    Map<String, Object> link2 = new HashMap<String, Object>();
+    link2.put("Id", 2);
+    room2Data.addNavigation("nr_Building", link2);
+    roomsData.addEntity(room2Data);
+    
roomsData.setCollectionProperties(EntityCollectionSerializerProperties.serviceRoot(BASE_URI).build());
+    
+    EdmEntitySet entitySet = 
edm.getDefaultEntityContainer().getEntitySet("Rooms");
+    final ODataResponse response =
+        new AtomSerializerDeserializer().writeFeed(entitySet, roomsData);
+    
+    final String xmlString = StringHelper.inputStreamToString((InputStream) 
response.getEntity());
+    assertNotNull(xmlString);
+    
verifyRoomsFeedWithInlineEmployeeFeedWithNavigationLinksWithoutKeys(xmlString, 
BASE_URI);
+  }
+  
+  private void verifyRoomsFeedWithInlineEmployeeFeedWithNavigationLinks(String 
xmlString, URI coll_uri) 
+      throws XpathException, IOException, SAXException {
+    assertXpathExists("/a:feed[@xml:base='" + coll_uri + "']", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:link/m:inline", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:link[@href=\"Buildings('1')\"]", 
xmlString);
+
+    assertXpathExists("/a:feed/a:entry/a:link/m:inline/a:feed[@xml:base='" + 
coll_uri + "']", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:link/m:inline/a:feed/a:entry", 
xmlString);
+    
assertXpathExists("/a:feed/a:entry/a:link/m:inline/a:feed/a:entry/m:properties/d:EmployeeId",
 xmlString);
+    
assertXpathExists("/a:feed/a:entry/a:link/m:inline/a:feed/a:entry/m:properties/d:RoomId",
 xmlString);
+
+    assertXpathExists("/a:feed/a:entry/a:content", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties/d:Id", 
xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties/d:Name", 
xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties/d:Seats", 
xmlString);
+    
+  }
+  
+  @Test
+  public void unbalancedPropertyFeedWithInlineEntryAndNavigationLink() throws 
Exception {
+    Edm edm = MockFacade.getMockEdm();
+    EdmTyped imageUrlProperty = edm.getEntityType("RefScenario", 
"Employee").getProperty("ImageUrl");
+    EdmFacets facets = mock(EdmFacets.class);
+    when(facets.getMaxLength()).thenReturn(1);
+    when(((EdmProperty) imageUrlProperty).getFacets()).thenReturn(facets);
+
+    EntityCollection roomsData = new EntityCollection();
+    Entity room1Data = new Entity();
+    room1Data.addProperty("Id", "1");
+    room1Data.addProperty("Name", "Neu Schwanstein");
+    room1Data.addProperty("Seats", new Integer(20));
+    
room1Data.setWriteProperties(EntitySerializerProperties.serviceRoot(BASE_URI).
+        validatingFacets(true).build());
+    
+    Map<String, Object> link1 = new HashMap<String, Object>();
+    link1.put("Id", 1);
+    room1Data.addNavigation("nr_Building", link1);
+    roomsData.addEntity(room1Data);
+    
+    Entity room2Data = new Entity();
+    room2Data.addProperty("Id", "2");
+    room2Data.addProperty("Name", "John");
+    room2Data.addProperty("Seats", new Integer(10));
+    
room2Data.setWriteProperties(EntitySerializerProperties.serviceRoot(BASE_URI).
+        validatingFacets(true).build());
+    
+    Entity data = new Entity();
+    data.addProperty("Id", "2");
+    data.addProperty("Name", "Team2");
+    
+    room2Data.addNavigation("nr_Building", data);
+    roomsData.addEntity(room2Data);
+    
roomsData.setCollectionProperties(EntityCollectionSerializerProperties.serviceRoot(BASE_URI).build());
+    EdmEntitySet entitySet = 
edm.getDefaultEntityContainer().getEntitySet("Rooms");
+    final ODataResponse response =
+        new AtomSerializerDeserializer().writeFeed(entitySet, roomsData);
+    assertNotNull(response);
+    assertNotNull(response.getEntity());
+
+    final String xmlString = StringHelper.inputStreamToString((InputStream) 
response.getEntity());
+    assertNotNull(xmlString);
+    assertXpathExists("/a:feed[@xml:base=\"http://host:80/service/\"]";, 
xmlString);
+    assertXpathExists("/a:feed/a:entry/a:link/m:inline", xmlString);
+    
assertXpathExists("/a:feed/a:entry/a:link/m:inline/a:entry/a:content/m:properties",
 xmlString);
+    
assertXpathExists("/a:feed/a:entry/a:link/m:inline/a:entry/a:content/m:properties/d:Id",
 xmlString);
+    
assertXpathExists("/a:feed/a:entry/a:link/m:inline/a:entry/a:content/m:properties/d:Name",
 xmlString);
+    assertXpathExists("/a:feed/a:entry/a:link[@href=\"Buildings('1')\"]", 
xmlString);
+  }
+  
+  private void 
verifyRoomsFeedWithInlineEmployeeFeedWithNavigationLinksWithoutKeys(String 
xmlString, URI coll_uri) 
+      throws XpathException, IOException, SAXException {
+    assertXpathExists("/a:feed[@xml:base='" + coll_uri + "']", xmlString);
+    
assertXpathExists("/a:feed/a:entry/a:link[@href=\"Rooms('A')/nr_Employees\"]", 
xmlString);
+    assertXpathExists("/a:feed/a:entry/a:link/m:inline", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:link[@href=\"Buildings('1')\"]", 
xmlString);
+
+    assertXpathExists("/a:feed/a:entry/a:link/m:inline/a:feed[@xml:base='" + 
coll_uri + "']", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:link/m:inline/a:feed/a:entry", 
xmlString);
+    
assertXpathNotExists("/a:feed/a:entry/a:link/m:inline/a:feed/a:entry/m:properties/d:EmployeeId",
 xmlString);
+    
assertXpathExists("/a:feed/a:entry/a:link/m:inline/a:feed/a:entry/m:properties/d:RoomId",
 xmlString);
+
+    assertXpathExists("/a:feed/a:entry/a:content", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties", xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties/d:Name", 
xmlString);
+    assertXpathExists("/a:feed/a:entry/a:content/m:properties/d:Seats", 
xmlString);
+    
+  }
+}

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