code: def setUp(self):
      h, w = self.shape
      self.x = numpy.random.uniform(
          -1, 1, (self.batches, self.n_channels, h, w)
      ).astype(self.x_dtype)
      self.gy = numpy.random.uniform(
          -1, 1, (self.batches, self.n_channels, h, w)
      ).astype(self.x_dtype)
  
file_path: chainer/tests/chainer_tests/functions_tests/connection_tests/test_shift.py
imports: import unittest
  import numpy
  import chainer
  from chainer import backend
  from chainer.backends import cuda
  from chainer import gradient_check
  from chainer import testing
  from chainer.testing import attr
  from chainer.testing import condition
  from chainer.functions.connection import shift
label_desc: Use image node_id 1 for calling the TestShiftFunction obj's underlying member method code with example usage: obj.setUp() without return types