code: def test_endslopes(self, xp, scp):
      # this is a smoke test for scipy/gh-3453: PCHIP interpolator should not
      # set edge slopes to zero if the data do not suggest zero
      # edge derivatives
      x = xp.array([0.0, 0.1, 0.25, 0.35])
      y1 = xp.array([279.35, 0.5e3, 1.0e3, 2.5e3])
      y2 = xp.array([279.35, 2.5e3, 1.50e3, 1.0e3])
      pchip = scp.interpolate.PchipInterpolator
      results = []
      for pp in (pchip(x, y1), pchip(x, y2)):
          for t in (x[0], x[-1]):
              results.append(pp(t, 1))
      return results
  
imports: import io
  import warnings
  import numpy
  import pytest
  import cupy
  from cupy.cuda import runtime
  from cupy import testing
  import cupyx.scipy.interpolate
  from cupyx.scipy.interpolate import CubicHermiteSpline
label_desc: Use image node_id 6 for calling the TestPCHIP obj's underlying member method code with example usage: obj.test_endslopes(xp, scp) and returns: results