code: def test_choose_unit(self):
      h = function_hooks.CupyMemoryProfileHook()
      self.assertEqual(
          (self.denomi, self.unit), h._choose_unit(self.bytes)
      )
  
imports: import unittest
  import numpy
  import six
  import chainer
  from chainer.backends import cuda
  from chainer import function_hooks
  from chainer import functions
  from chainer.functions.math import basic_math
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 1 for calling the TestCupyMemoryProfileReportChooseUnit obj's underlying member method code with example usage: obj.test_choose_unit() without return types