code: def generate_inputs(self):
      x = numpy.random.uniform(-1, 1, self.shape).astype(self.dtype)
      t = numpy.random.randint(-1, 2, self.shape).astype(
          self.label_dtype
      )
      return x, t
  
imports: import unittest
  import numpy
  import six
  import chainer
  from chainer import functions
  from chainer import testing
  from chainer.utils import force_array
  from chainer.utils import type_check
label_desc: Use image node_id 2 for calling the TestBinaryAccuracy obj's underlying member method code with example usage: obj.generate_inputs() and returns: x,  t