text: import pytest
  
  import pandas as pd
  from pandas.tests.extension.list.array import (
      ListArray,
      ListDtype,
      make_data,
  )
  
  
  @pytest.fixture
  def dtype():
      return ListDtype()
  
  
  @pytest.fixture
  def data():
      """Length-100 ListArray for semantics test."""
      data = make_data()
  
      while len(data[0]) == len(data[1]):
          data = make_data()
  
      return ListArray(data)
  
  
  def test_to_csv(data):
      # https://github.com/pandas-dev/pandas/issues/28840
      # array with list-likes fail when doing astype(str) on the numpy array
      # which was done in to_native_types
      df = pd.DataFrame({"a": data})
      res = df.to_csv()
      assert str(data[0]) in res
  