code: def test_chebyshev_(self, xp, scp):
      a = self._make_matrix(xp, self.dtype, self.order)
      out = scp.spatial.distance.chebyshev(a, a)
      return out
  
imports: import unittest
  import pytest
  import numpy
  import cupy
  import cupyx.scipy.spatial.distance
  from cupy import testing
label_desc: Use image node_id 4 for calling the TestDistanceFunction obj's underlying member method code with example usage: obj.test_chebyshev_(xp, scp) and returns: out