class_docstr: Meta Test: ImageComparison test cases
class_docstr_tok: ["Meta","Test",":","ImageComparison","test","cases"]
docstr: Assert raises if an axes object is not supplied
docstr_tok: ["Assert","raises","if","an","axes","object","is","not","supplied"]
code: def test_image_comparison_requires_ax(self):
      """
      Assert raises if an axes object is not supplied
      """
      with pytest.raises(ValueError, match="ax must be specified"):
          ImageComparison(inspect.stack())
  
imports: import os
  import pytest
  import inspect
  import matplotlib
  from tests.rand import RandomVisualizer
  from unittest.mock import MagicMock, patch
  from tests.base import ACTUAL_IMAGES, BASELINE_IMAGES
  from tests.base import VisualTestCase, ImageComparison
  from yellowbrick.exceptions import ImageComparisonFailure
label_desc: Use image node_id 3 for calling the TestMetaImageComparison obj's underlying member method code with example usage: obj.test_image_comparison_requires_ax() without return types