code: def test_white_tophat_and_black_tophat(self, xp, scp):
      x = testing.shaped_random(self.shape, xp, self.x_dtype)
      if self.x_dtype == self.output:
          pytest.skip("redundant")
      return self._filter(xp, scp, x)
  
imports: import numpy
  import pytest
  from cupy import testing
  import cupyx.scipy.ndimage
label_desc: Use image node_id 2 for calling the TestWhiteTophatAndBlackTopHat obj's underlying member method code with example usage: obj.test_white_tophat_and_black_tophat(xp, scp) and returns: self