final EntityProviderWriteProperties properties = EntityProviderWriteProperties
.serviceRoot(URI.create(BASE_URI))
.additionalLinks(links)
.build();
final ODataResponse response = new JsonEntityProvider().writeEntry(entitySet, data, properties);
final String json = verifyResponse(response);
assertEquals("{\"d\":{\"__metadata\":{\"id\":\"" + BASE_URI + "Rooms('1')\","
+ "\"uri\":\"" + BASE_URI + "Rooms('1')\",\"type\":\"RefScenario.Room\"},"
+ "\"Id\":\"1\",\"Name\":null,\"Seats\":null,\"Version\":null,"
+ "\"nr_Employees\":{\"__deferred\":{\"uri\":\"" + BASE_URI + "Rooms('1')/nr_Employees\"}},"