code: def test_correctness(self, xp, scp):
      x = xp.asarray([0, 2, 7])
      y = xp.asarray([-1, 2, 3])
      dydx = xp.asarray([0, 3, 7])
      s = scp.interpolate.CubicHermiteSpline(x, y, dydx)
      return s(x), s(x, 1)
  
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 1 for calling the TestCubicHermiteSpline obj's underlying member method code with example usage: obj.test_correctness(xp, scp) and returns: s,  s