code: def setUp(self):
      self.x = numpy.random.uniform(-1, 1, (2, 3, 4)).astype("f")
  
imports: import unittest
  import numpy
  from chainer.backends import cuda
  from chainer import functions
  from chainer import testing
  from chainer.testing import attr
  from chainer.utils import force_array
  from chainer.utils import type_check
label_desc: Use image node_id 1 for calling the TestCumsumInvalidTypeError obj's underlying member method code with example usage: obj.setUp() without return types