code: def test_binary_propagation(self, xp, scp):
      if self.x_dtype == self.output:
          pytest.skip("redundant")
      x = xp.asarray(self.data, dtype=self.x_dtype)
      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 TestBinaryPropagation obj's underlying member method code with example usage: obj.test_binary_propagation(xp, scp) and returns: self