EdmEntitySet employeesSet = MockFacade.getMockEdm().getDefaultEntityContainer().getEntitySet("Employees");
EdmCustomizableFeedMappings employeeCustomPropertyMapping = mock(EdmCustomizableFeedMappings.class);
when(employeeCustomPropertyMapping.isFcKeepInContent()).thenReturn(Boolean.FALSE);
when(employeeCustomPropertyMapping.getFcNsPrefix()).thenReturn("customPre");
when(employeeCustomPropertyMapping.getFcNsUri()).thenReturn("http://customUri.com");
EdmTyped employeeEntryDateProperty = employeesSet.getEntityType().getProperty("EmployeeName");
when(((EdmProperty) employeeEntryDateProperty).getCustomizableFeedMappings()).thenReturn(
employeeCustomPropertyMapping);
Map<String, String> prefixMap = new HashMap<String, String>();
prefixMap.put("a", Edm.NAMESPACE_ATOM_2005);