content: import os
  import unittest
  
  from pyecharts.globals import RenderSepType
  
  
  class TestGlobals(unittest.TestCase):
      def test_render_sep_type(self):
          # normal test
          render_sep_type = RenderSepType.SepType
          self.assertEqual(os.linesep, render_sep_type)
  
          # test modification
          before_modify_type = RenderSepType.SepType
          RenderSepType.SepType = "\t"
          after_modify_type = RenderSepType.SepType
          self.assertNotEqual(before_modify_type, after_modify_type)
  
          # Restore config
          RenderSepType.SepType = os.linesep
  