code: def test_cast(self, xp, scp):
      # regression test for integer input data, see gh-3453
      data = xp.array(
          [
              [0, 4, 12, 27, 47, 60, 79, 87, 99, 100],
              [-33, -33, -19, -2, 12, 26, 38, 45, 53, 55],
          ]
      )
      xx = xp.arange(100)
      curve = scp.interpolate.PchipInterpolator(data[0], data[1])(xx)
  
      data1 = data * 1.0
      curve1 = scp.interpolate.PchipInterpolator(data1[0], data1[1])(xx)
      return curve, curve1
  
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 4 for calling the TestPCHIP obj's underlying member method code with example usage: obj.test_cast(xp, scp) and returns: curve,  curve1