|  | # 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() |