code: def test_n_equals_3(self):
      x = np.linspace(0.7, 1, 31, endpoint=True)
      p = np.power(1 - x, 3)
      n = np.array([3] * len(x))
      dataset = np.column_stack([n, x, p])
      FuncData(smirnov, dataset, (0, 1), 2, rtol=_rtol).check(
          dtypes=[int, float, float]
      )
      dataset[:, -1] = 1 - dataset[:, -1]
      FuncData(_smirnovc, dataset, (0, 1), 2, rtol=_rtol).check(
          dtypes=[int, float, float]
      )
  
imports: import itertools
  import sys
  import pytest
  import numpy
  from numpy.testing import assert_
  from scipy.special._testutils import FuncData
  from scipy.special import kolmogorov, kolmogi, smirnov, smirnovi
  from scipy.special._ufuncs import _kolmogc, _kolmogci, _kolmogp, _smirnovc, _smirnovci, _smirnovp
label_desc: Use image node_id 8 for calling the TestSmirnov obj's underlying member method code with example usage: obj.test_n_equals_3() without return types