new_contents: from __future__ import with_statement
  
  import errno
  import unittest
  try:
      from unittest import mock
  except ImportError:
      import mock  # < PY33
  
  from flake8 import reporter
  
  
  def ioerror_report_factory(errno_code):
      class IOErrorBaseQReport(reporter.BaseQReport):
          def _process_main(self):
              raise IOError(errno_code, 'Fake bad pipe exception')
  
      options = mock.MagicMock()
      options.jobs = 2
      return IOErrorBaseQReport(options)
  
  
  class TestBaseQReport(unittest.TestCase):
      def test_does_not_raise_a_bad_pipe_ioerror(self):
          """Test that no EPIPE IOError exception is re-raised or leaked."""
          report = ioerror_report_factory(errno.EPIPE)
          try:
              report.process_main()
          except IOError:
              self.fail('BaseQReport.process_main raised an IOError for EPIPE'
                        ' but it should have caught this exception.')
  
      def test_raises_a_enoent_ioerror(self):
          """Test that an ENOENT IOError exception is re-raised."""
          report = ioerror_report_factory(errno.ENOENT)
          self.assertRaises(IOError, report.process_main)
  
subject: Add a regression test for EPIPE IOErrors