code: def test_warning_with_short_palette(
      self, mock_warn: MagicMock, mock_error: MagicMock
  ) -> None:
      m = bmm.CategoricalColorMapper(
          factors=["a", "b", "c"], palette=["red", "green"]
      )
      issues = check_integrity([m])
      process_validation_issues(issues)
      assert not mock_error.called
      assert mock_warn.called
  
imports: from __future__ import annotations
  import pytest
  from unittest.mock import MagicMock, patch
  import pandas
  from bokeh.core.validation import check_integrity, process_validation_issues
  from bokeh.palettes import Spectral6
  from _util_models import check_properties_existence
  import bokeh.models.mappers
label_desc: Use image node_id 2 for calling the Test_CategoricalColorMapper obj's underlying member method code with example usage: obj.test_warning_with_short_palette(mock_warn, mock_error) without return types