code: def test_auto_name(self):
      self.assertEqual(naming.auto_name("unique_name"), "unique_name")
      self.assertEqual(naming.auto_name("unique_name"), "unique_name_1")
      self.assertEqual(naming.auto_name("unique_name"), "unique_name_2")
  
imports: from keras.testing import test_case
  from keras.utils import naming
label_desc: Use image node_id 2 for calling the NamingUtilsTest obj's underlying member method code with example usage: obj.test_auto_name() without return types