old_contents: # coding: utf-8
  from __future__ import unicode_literals, division, absolute_import, print_function
  
  import unittest
  import re
  import sys
  
  from . import requires_oscrypto
  from ._import import _preload
  
  from tests import test_classes
  
  if sys.version_info < (3,):
      range = xrange  # noqa
      from cStringIO import StringIO
  else:
      from io import StringIO
  
  
  def run(matcher=None, repeat=1, ci=False):
      """
      Runs the tests
  
      :param matcher:
          A unicode string containing a regular expression to use to filter test
          names by. A value of None will cause no filtering.
  
      :param repeat:
          An integer - the number of times to run the tests
  
      :param ci:
          A bool, indicating if the tests are being run as part of CI
  
      :return:
          A bool - if the tests succeeded
      """
  
      _preload(requires_oscrypto, not ci)
  
      loader = unittest.TestLoader()
      # We have to manually track the list of applicable tests because for
      # some reason with Python 3.4 on Windows, the tests in a suite are replaced
      # with None after being executed. This breaks the repeat functionality.
      test_list = []
      for test_class in test_classes():
          if matcher:
              names = loader.getTestCaseNames(test_class)
              for name in names:
                  if re.search(matcher, name):
                      test_list.append(test_class(name))
          else:
              test_list.append(loader.loadTestsFromTestCase(test_class))
  
      stream = sys.stdout
      verbosity = 1
      if matcher and repeat == 1:
          verbosity = 2
      elif repeat > 1:
          stream = StringIO()
  
      for _ in range(0, repeat):
          suite = unittest.TestSuite()
          for test in test_list:
              suite.addTest(test)
          result = unittest.TextTestRunner(stream=stream, verbosity=verbosity).run(suite)
  
          if len(result.errors) > 0 or len(result.failures) > 0:
              if repeat > 1:
                  print(stream.getvalue())
              return False
  
          if repeat > 1:
              stream.truncate(0)
  
      return True
  
new_contents: # coding: utf-8
  from __future__ import unicode_literals, division, absolute_import, print_function
  
  import unittest
  import re
  import sys
  import warnings
  
  from . import requires_oscrypto
  from ._import import _preload
  
  from tests import test_classes
  
  if sys.version_info < (3,):
      range = xrange  # noqa
      from cStringIO import StringIO
  else:
      from io import StringIO
  
  
  def run(matcher=None, repeat=1, ci=False):
      """
      Runs the tests
  
      :param matcher:
          A unicode string containing a regular expression to use to filter test
          names by. A value of None will cause no filtering.
  
      :param repeat:
          An integer - the number of times to run the tests
  
      :param ci:
          A bool, indicating if the tests are being run as part of CI
  
      :return:
          A bool - if the tests succeeded
      """
  
      _preload(requires_oscrypto, not ci)
  
      warnings.filterwarnings("error")
  
      loader = unittest.TestLoader()
      # We have to manually track the list of applicable tests because for
      # some reason with Python 3.4 on Windows, the tests in a suite are replaced
      # with None after being executed. This breaks the repeat functionality.
      test_list = []
      for test_class in test_classes():
          if matcher:
              names = loader.getTestCaseNames(test_class)
              for name in names:
                  if re.search(matcher, name):
                      test_list.append(test_class(name))
          else:
              test_list.append(loader.loadTestsFromTestCase(test_class))
  
      stream = sys.stdout
      verbosity = 1
      if matcher and repeat == 1:
          verbosity = 2
      elif repeat > 1:
          stream = StringIO()
  
      for _ in range(0, repeat):
          suite = unittest.TestSuite()
          for test in test_list:
              suite.addTest(test)
          result = unittest.TextTestRunner(stream=stream, verbosity=verbosity).run(suite)
  
          if len(result.errors) > 0 or len(result.failures) > 0:
              if repeat > 1:
                  print(stream.getvalue())
              return False
  
          if repeat > 1:
              stream.truncate(0)
  
      return True
  
subject: Raise an exception when warnings are created during a test run