code: def test_string(self):
      self.assertIs("xyz".endswith("z"), True)
      self.assertIs("xyz".endswith("x"), False)
      self.assertIs("xyz0123".isalnum(), True)
      self.assertIs("@#$%".isalnum(), False)
      self.assertIs("xyz".isalpha(), True)
      self.assertIs("@#$%".isalpha(), False)
      self.assertIs("0123".isdigit(), True)
      self.assertIs("xyz".isdigit(), False)
      self.assertIs("xyz".islower(), True)
      self.assertIs("XYZ".islower(), False)
      self.assertIs("0123".isdecimal(), True)
      self.assertIs("xyz".isdecimal(), False)
      self.assertIs("0123".isnumeric(), True)
      self.assertIs("xyz".isnumeric(), False)
      self.assertIs(" ".isspace(), True)
      self.assertIs("\xa0".isspace(), True)
      self.assertIs("\u3000".isspace(), True)
      self.assertIs("XYZ".isspace(), False)
      self.assertIs("X".istitle(), True)
      self.assertIs("x".istitle(), False)
      self.assertIs("XYZ".isupper(), True)
      self.assertIs("xyz".isupper(), False)
      self.assertIs("xyz".startswith("x"), True)
      self.assertIs("xyz".startswith("z"), False)
  
imports: import unittest
  from test.support import os_helper
  import os
label_desc: Use image node_id 16 for calling the BoolTest obj's underlying member method code with example usage: obj.test_string() without return types