Using appropriate checks in tests

Lib/test/test_with.py

-#!/usr/bin/env python3
-
 """Unit tests for the with statement specified in PEP 343."""
 
 
 __author__ = "Mike Bland"
 __email__ = "mbland at acm dot org"
 
 import sys
 import unittest
 from collections import deque
 from contextlib import _GeneratorContextManager, contextmanager
@@ skipping 730 matching lines @@
     run_unittest(FailureTestCase, NonexceptionalTestCase,
                  NestedNonexceptionalTestCase, ExceptionalTestCase,
                  NonLocalFlowControlTestCase,
                  AssignmentTargetTestCase,
                  ExitSwallowsExceptionTestCase,
                  NestedWith)
 
 
 if __name__ == '__main__':
     test_main()