code: def test_pad_special(self, xp):
      array = xp.array(self.array)
  
      if self.mode == "constant":
          a = xp.pad(
              array,
              self.pad_width,
              mode=self.mode,
              constant_values=self.constant_values,
          )
      elif self.mode in ["edge", "reflect"]:
          a = xp.pad(array, self.pad_width, mode=self.mode)
      return a
  
imports: import unittest
  import warnings
  import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 1 for calling the TestPadSpecial obj's underlying member method code with example usage: obj.test_pad_special(xp) and returns: a