code: def test_pad(self, xp, dtype):
      array = xp.array(self.array, dtype=dtype)
  
      # Older version of NumPy(<1.12) can emit ComplexWarning
      def f():
          if self.mode == "constant":
              return xp.pad(
                  array,
                  self.pad_width,
                  mode=self.mode,
                  constant_values=self.constant_values,
              )
          elif self.mode in ["minimum", "maximum"]:
              return xp.pad(
                  array,
                  self.pad_width,
                  mode=self.mode,
                  stat_length=self.stat_length,
              )
          elif self.mode in ["reflect", "symmetric"]:
              return xp.pad(
                  array,
                  self.pad_width,
                  mode=self.mode,
                  reflect_type=self.reflect_type,
              )
  
      if xp is numpy:
          with warnings.catch_warnings():
              warnings.simplefilter("ignore", numpy.ComplexWarning)
              return f()
      else:
          return f()
  
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 TestPad obj's underlying member method code with example usage: obj.test_pad(xp, dtype) and returns: f, xp, f, xp, xp