code: def test_construct_bad_class_props(self) -> None:
      with pytest.raises(ValueError) as exc:
          Theme(json=dict(attrs=dict(SomeClass=42)))
      assert "should be a dictionary of properties" in repr(exc.value)
  
imports: from __future__ import annotations
  import pytest
  import os
  import tempfile
  from bokeh.core.properties import Int, String
  from bokeh.core.property_mixins import FillProps, LineProps, TextProps
  from bokeh.document import Document
  from bokeh.model import Model
  from bokeh.plotting import figure
  from bokeh.util.deprecation import BokehDeprecationWarning
  from bokeh.themes import Theme, built_in_themes, DARK_MINIMAL, LIGHT_MINIMAL
label_desc: Use image node_id 6 for calling the TestThemes obj's underlying member method code with example usage: obj.test_construct_bad_class_props() without return types