code: def setUp(self):
      self.x = cuda.cupy.arange(
          2 * 3 * 4 * 3, dtype=self.dtype
      ).reshape(2, 3, 4, 3)
      self.gy = cuda.cupy.random.uniform(-1, 1, (2, 3, 2, 2)).astype(
          self.dtype
      )
  
imports: import unittest
  import numpy
  import six
  import chainer
  from chainer.backends import cuda
  from chainer import functions
  from chainer import testing
  from chainer.testing import attr
  from chainer.testing import backend
label_desc: Use image node_id 1 for calling the TestAveragePooling2DCudnnCall obj's underlying member method code with example usage: obj.setUp() without return types