code: def test_bbox_iou_invalid(self):
      bbox_a = np.array(self.bbox_a, dtype=np.float32)
      bbox_b = np.array(self.bbox_b, dtype=np.float32)
  
      with self.assertRaises(IndexError):
          bbox_iou(bbox_a, bbox_b)
  
file_path: chainercv/tests/utils_tests/bbox_tests/test_bbox_iou.py
imports: from __future__ import division
  import unittest
  import numpy
  from chainer.backends import cuda
  from chainer import testing
  from chainer.testing import attr
  from chainercv.utils import bbox_iou
label_desc: Use image node_id 1 for calling the TestBboxIouInvalidShape obj's underlying member method code with example usage: obj.test_bbox_iou_invalid() without return types