code: def test_add_skills_with_smartDataframe(
      self, smart_dataframe: SmartDataframe
  ):
      @skill
      def skill_a(*args, **kwargs):
          """Skill A"""
          return "SkillA Result"
  
      skill_b = Skill.from_function(
          func=lambda _: "SkillB Result", description="Skill B"
      )
  
      smart_dataframe.add_skills(skill_a)
      assert len(smart_dataframe._lake._skills.skills) == 1
  
      smart_dataframe._lake._skills._skills = []
      smart_dataframe.add_skills(skill_a, skill_b)
      assert len(smart_dataframe._lake._skills.skills) == 2
  
imports: from typing import Optional
  from unittest.mock import MagicMock, Mock, patch
  import uuid
  import pandas
  import pytest
  from pandasai.agent import Agent
  from pandasai.helpers.code_manager import CodeExecutionContext, CodeManager
  from pandasai.helpers.skills_manager import SkillsManager
  from pandasai.llm.fake import FakeLLM
  from pandasai.skills import skill, Skill
  from pandasai.smart_dataframe import SmartDataframe
label_desc: Use image node_id 14 for calling the TestSkills obj's underlying member method code with example usage: obj.test_add_skills_with_smartDataframe(smart_dataframe) and returns: str