code: def test_two_points(self, xp, scp):
      # regression test for gh-6222: pchip([0, 1], [0, 1]) fails because
      # it tries to use a three-point scheme to estimate edge derivatives,
      # while there are only two points available.
      # Instead, it should construct a linear interpolator.
      x = xp.linspace(0, 1, 11)
      p = scp.interpolate.PchipInterpolator([0, 1], [0, 2])
      return p(x)
  
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 8 for calling the TestPCHIP obj's underlying member method code with example usage: obj.test_two_points(xp, scp) and returns: p