def test_auto_schema_missing_values(self):
        docs = [
            {"a": []},
            {"a": ["str"]},
            {"a": []},
        ]
        self.coll.delete_many({})
        self.coll.insert_many(docs)
        actual = find_arrow_all(self.coll, {}, projection={"_id": 0})
        expected = find_arrow_all(self.coll, {}, projection={"_id": 0}, schema=Schema({"a": list_(string())}))
        self.assertEqual(actual.schema, expected.schema)
        self.assertEqual(actual, expected)

>       self.assertEqual(actual, expected)
E       AssertionError: pyarr[19 chars]em: string>
E         child 0, item: string
E       ----
E       a: [[null,["str"],[]]] != pyarr[19 chars]em: string>
E         child 0, item: string
E       ----
E       a: [[[],["str"],[]]]

test/test_arrow.py:488: AssertionError