marshmallow mongoengine validate

validate.py

def find_models():
    import models
    from mongoengine.base.common import _document_registry
    def _checker(model_class):
        schema_class = getattr(model_class, 'schema_class', None)
        return schema_class is not None and issubclass(schema_class, Schema)
    return filter(_checker, _document_registry.values())


@pytest.mark.parametrize('model', find_models())
def test_schema_not_overlaps_model(model):
    
    model_class = model
    schema_class = model_class.schema_class

    schema_fields = schema_class().declared_fields.keys()
    model_fields = model_class._fields.keys()
    
    assert set(schema_fields) == set(model_fields)