code: def test_format(self):
      self.assertEqual("%d" % False, "0")
      self.assertEqual("%d" % True, "1")
      self.assertEqual("%x" % False, "0")
      self.assertEqual("%x" % True, "1")
  
imports: import unittest
  from test.support import os_helper
  import os
label_desc: Use image node_id 10 for calling the BoolTest obj's underlying member method code with example usage: obj.test_format() without return types