old_contents: #!/usr/bin/env python3
  # Copyright (c) 2013 Spotify AB
  # Copyright (c) 2014 Brainly.com sp. z o.o.
  #
  # Licensed under the Apache License, Version 2.0 (the "License"); you may not
  # use this file except in compliance with the License. You may obtain a copy of
  # the License at
  #
  # http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  # License for the specific language governing permissions and limitations under
  # the License.
  
  try:
      import coverage
  except ImportError:
      pass
  import sys
  import unittest
  import os
  
  def main():
      #Cleanup old html report:
      for root, dirs, files in os.walk('test/output_coverage_html/'):
          for f in files:
              if f == '.gitignore' or f == '.empty_dir':
                  continue
              os.unlink(os.path.join(root, f))
          for d in dirs:
              shutil.rmtree(os.path.join(root, d))
  
      #Perform coverage analisys:
      if "coverage" in sys.modules:
          cov = coverage.coverage()
          cov.start()
  
      #Discover the tests and execute them:
      loader = unittest.TestLoader()
      tests = loader.discover('./test/')
      testRunner = unittest.runner.TextTestRunner(descriptions=True, verbosity=1)
      testRunner.run(tests)
  
      if "coverage" in sys.modules:
          cov.stop()
          cov.html_report()
  
  if __name__ == '__main__':
      main()
  
new_contents: #!/usr/bin/env python3
  # Copyright (c) 2013 Spotify AB
  # Copyright (c) 2014 Brainly.com sp. z o.o.
  #
  # Licensed under the Apache License, Version 2.0 (the "License"); you may not
  # use this file except in compliance with the License. You may obtain a copy of
  # the License at
  #
  # http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  # License for the specific language governing permissions and limitations under
  # the License.
  
  try:
      import coverage
  except ImportError:
      pass
  import sys
  import unittest
  import os
  
  def main():
      #Cleanup old html report:
      for root, dirs, files in os.walk('test/output_coverage_html/'):
          for f in files:
              if f == '.gitignore' or f == '.empty_dir':
                  continue
              os.unlink(os.path.join(root, f))
          for d in dirs:
              shutil.rmtree(os.path.join(root, d))
  
      #Perform coverage analisys:
      if "coverage" in sys.modules:
          cov = coverage.coverage()
          cov.start()
  
      #Discover the tests and execute them:
      loader = unittest.TestLoader()
      tests = loader.discover('./test/')
      testRunner = unittest.runner.TextTestRunner(descriptions=True, verbosity=1)
      res = testRunner.run(tests)
  
      if "coverage" in sys.modules:
          cov.stop()
          cov.html_report()
  
      if res.wasSuccessful():
          sys.exit(0)
      else:
          sys.exit(1)
  
  if __name__ == '__main__':
      main()
  
subject: Fix exit status of the test run script