code: def setUp(self):
      self.x = numpy.random.uniform(0.5, 1, (2, 2)).astype(self.dtype)
      if self.dtype == numpy.float16:
          self.check_forward_options = {"atol": 5e-3, "rtol": 5e-3}
      else:
          self.check_forward_options = {}
  
imports: import unittest
  import numpy
  import six
  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
  from chainer.utils import type_check
label_desc: Use image node_id 1 for calling the TestDetSmallCase obj's underlying member method code with example usage: obj.setUp() without return types