code: def setUp(self):
      self.default_debug = chainer.is_debug()
      chainer.set_debug(True)
  
      self.x_data = numpy.random.uniform(-1, 1, (4, 3, 2))
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import functions
  from chainer import gradient_check
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 1 for calling the TestInvalidGetItem obj's underlying member method code with example usage: obj.setUp() without return types