code: def test_delete_at_indices(self):
      test_field = CnTextField(sents[0])
      self.assertRaises(ValueError, test_field.delete_at_indices, [])
      self.assertRaises(
          ValueError, test_field.delete_at_indices, [500, 700]
      )
      self.assertEqual(
          "我乒乓球，你真的太懒了。她打的很漂亮。", test_field.delete_at_index([1, 5]).text
      )
  
imports: import unittest
  from textflint.input.component.field.cn_text_field import *
label_desc: Use image node_id 15 for calling the TestCnTextField obj's underlying member method code with example usage: obj.test_delete_at_indices() without return types