code: def test_read_image_raise_error_with_cv2(self):
      if self.backend == "cv2" and not _cv2_available:
          with chainer.using_config(
              "cv_read_image_backend", self.backend
          ):
              with self.assertRaises(ValueError):
                  read_image(self.file)
  
imports: import numpy
  import tempfile
  import unittest
  from PIL import Image
  import chainer
  from chainer import testing
  from chainercv.utils import read_image
  from chainercv.utils import write_image
label_desc: Use image node_id 5 for calling the TestReadImage obj's underlying member method code with example usage: obj.test_read_image_raise_error_with_cv2() without return types