code: def test_inplace_dict_update_view(
      self, val, using_copy_on_write, warn_copy_on_write
  ):
      # GH#47188
      df = DataFrame({"x": [np.nan, 2], "y": [np.nan, 2]})
      df_orig = df.copy()
      result_view = df[:]
      with tm.assert_cow_warning(warn_copy_on_write):
          df.fillna(val, inplace=True)
      expected = DataFrame({"x": [-1, 2.0], "y": [-1.0, 2]})
      tm.assert_frame_equal(df, expected)
      if using_copy_on_write:
          tm.assert_frame_equal(result_view, df_orig)
      else:
          tm.assert_frame_equal(result_view, expected)
  
imports: import numpy
  import pytest
  from pandas._config import using_pyarrow_string_dtype
  from pandas import Categorical, DataFrame, DatetimeIndex, NaT, PeriodIndex, Series, TimedeltaIndex, Timestamp, date_range, to_datetime
  import pandas._testing
  from pandas.tests.frame.common import _check_mixed_float
label_desc: Use image node_id 40 for calling the TestFillNA obj's underlying member method code with example usage: obj.test_inplace_dict_update_view(val, using_copy_on_write, warn_copy_on_write) without return types