code: def test_setitem_chained_setfault(self, using_copy_on_write):
      # GH6026
      data = [
          "right",
          "left",
          "left",
          "left",
          "right",
          "left",
          "timeout",
      ]
      mdata = ["right", "left", "left", "left", "right", "left", "none"]
  
      df = DataFrame({"response": np.array(data)})
      mask = df.response == "timeout"
      with tm.raises_chained_assignment_error():
          df.response[mask] = "none"
      if using_copy_on_write:
          tm.assert_frame_equal(df, DataFrame({"response": data}))
      else:
          tm.assert_frame_equal(df, DataFrame({"response": mdata}))
  
      recarray = np.rec.fromarrays([data], names=["response"])
      df = DataFrame(recarray)
      mask = df.response == "timeout"
      with tm.raises_chained_assignment_error():
          df.response[mask] = "none"
      if using_copy_on_write:
          tm.assert_frame_equal(df, DataFrame({"response": data}))
      else:
          tm.assert_frame_equal(df, DataFrame({"response": mdata}))
  
      df = DataFrame({"response": data, "response1": data})
      df_original = df.copy()
      mask = df.response == "timeout"
      with tm.raises_chained_assignment_error():
          df.response[mask] = "none"
      if using_copy_on_write:
          tm.assert_frame_equal(df, df_original)
      else:
          tm.assert_frame_equal(
              df, DataFrame({"response": mdata, "response1": data})
          )
  
      # GH 6056
      expected = DataFrame({"A": [np.nan, "bar", "bah", "foo", "bar"]})
      df = DataFrame(
          {"A": np.array(["foo", "bar", "bah", "foo", "bar"])}
      )
      with tm.raises_chained_assignment_error():
          df["A"].iloc[0] = np.nan
      if using_copy_on_write:
          expected = DataFrame(
              {"A": ["foo", "bar", "bah", "foo", "bar"]}
          )
      else:
          expected = DataFrame(
              {"A": [np.nan, "bar", "bah", "foo", "bar"]}
          )
      result = df.head()
      tm.assert_frame_equal(result, expected)
  
      df = DataFrame(
          {"A": np.array(["foo", "bar", "bah", "foo", "bar"])}
      )
      with tm.raises_chained_assignment_error():
          df.A.iloc[0] = np.nan
      result = df.head()
      tm.assert_frame_equal(result, expected)
  
imports: from string import ascii_letters
  import numpy
  import pytest
  from pandas.errors import SettingWithCopyError, SettingWithCopyWarning
  import pandas
  from pandas import DataFrame, Index, Series, Timestamp, date_range, option_context
  import pandas._testing
label_desc: Use image node_id 1 for calling the TestChaining obj's underlying member method code with example usage: obj.test_setitem_chained_setfault(using_copy_on_write) without return types