code: def test_fillna_limit_and_value(self):
      # limit and value
      df = DataFrame(np.random.default_rng(2).standard_normal((10, 3)))
      df.iloc[2:7, 0] = np.nan
      df.iloc[3:5, 2] = np.nan
  
      expected = df.copy()
      expected.iloc[2, 0] = 999
      expected.iloc[3, 2] = 999
      result = df.fillna(999, limit=1)
      tm.assert_frame_equal(result, 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 8 for calling the TestFillNA obj's underlying member method code with example usage: obj.test_fillna_limit_and_value() without return types