from io import StringIO

import numpy as np
import pytest

import pandas as pd
from pandas.tests.extension.base.base import BaseExtensionTests


class BaseParsingTests(BaseExtensionTests):
    @pytest.mark.parametrize("engine", ["c", "python"])
    def test_EA_types(self, engine, data):
        df = pd.DataFrame({"with_dtype": pd.Series(data, dtype=str(data.dtype))})
        csv_output = df.to_csv(index=False, na_rep=np.nan)
        result = pd.read_csv(
            StringIO(csv_output), dtype={"with_dtype": str(data.dtype)}, engine=engine
        )
        expected = df
        self.assert_frame_equal(result, expected)