| # Protocol Buffers - Google's data interchange format | 
 | # Copyright 2008 Google Inc.  All rights reserved. | 
 | # | 
 | # Use of this source code is governed by a BSD-style | 
 | # license that can be found in the LICENSE file or at | 
 | # https://developers.google.com/open-source/licenses/bsd | 
 | """Test that Kokoro is using the expected version of python.""" | 
 |  | 
 | import os | 
 | import sys | 
 | import unittest | 
 |  | 
 |  | 
 | class PythonVersionTest(unittest.TestCase): | 
 |  | 
 |   def testPython3(self): | 
 |     """Test that we can import nested import public messages.""" | 
 |  | 
 |     exp = os.getenv('KOKORO_PYTHON_VERSION', '') | 
 |     if not exp: | 
 |       print('No kokoro python version found, skipping check', file=sys.stderr) | 
 |       return | 
 |     self.assertTrue( | 
 |         sys.version.startswith(exp), | 
 |         'Expected Python %s but found Python %s' % (exp, sys.version)) | 
 |  | 
 |  | 
 | if __name__ == '__main__': | 
 |   unittest.main() |