@pytest.mark.parametrize('method', ['ffill', 'bfill'])
def test_fillna_series_method(self, data_missing, method):
    BaseMissingTests.test_fillna_series_method(self, data_missing, method)
@pytest.mark.parametrize('method', ['ffill', 'bfill'])
def test_fillna_series_method(self, data_missing, method):
    BaseMissingTests.test_fillna_series_method(self, data_missing, method)