// iterator has a source
assertHasSelectEdge(iterator, db);
// attributes in the schema
DomainAttribute id = assertHasDomainAttribute(news, "id");
DomainAttribute title = assertHasDomainAttribute(news, "title");
DomainAttribute content = assertHasDomainAttribute(news, "content");
assertEquals(((EXSDDataType) id.getEType()).getDefinition().getURI(), BuiltinDataTypes.getTypeInteger().getURI());
assertEquals(((EXSDDataType) title.getEType()).getDefinition().getURI(), BuiltinDataTypes.getTypeString().getURI());
assertEquals(((EXSDDataType) content.getEType()).getDefinition().getURI(), BuiltinDataTypes.getTypeString().getURI());
}