code: def test_line_starting_and_ending_with_triple_quotes(self):
      content = '"""This is a one-liner docstring."""\n'
      self.create_file("test_file_3.py", content)
      path = os.path.join(self.test_dir, "test_file_3.py")
      self.assertEqual(count_loc(path), 0)
  
imports: import os
  import sys
  from io import StringIO
  from keras.testing import test_case
  from keras.utils.code_stats import count_loc
label_desc: Use image node_id 19 for calling the TestCountLoc obj's underlying member method code with example usage: obj.test_line_starting_and_ending_with_triple_quotes() without return types