new_contents: import glob
  from mrs.fileformats import LineReader
  import sys
  
  try:
      from cStringIO import StringIO as BytesIO
  except ImportError:
      from io import BytesIO
  
  PY3 = sys.version_info[0] == 3
  
  
  def test_dickens():
      with open('tests/data/dickens/split1.txt', 'rb') as f:
          reader = LineReader(f)
          lines = list(reader)
          assert len(lines) == 2
  
          key, value = lines[0]
          assert key == 0
          assert value == 'It was the best of times,\n'
  
          key, value = lines[1]
          assert key == 1
          assert value == 'it was the worst of times,\n'
  
  def test_bytesio():
      orig_lines = ['line 1\n', 'line 2\n', '3\tline\n']
      if PY3:
          orig_lines.append('line ∞\n')
      else:
          orig_lines = [unicode(s) for s in orig_lines]
          orig_lines.append('line \xe2\x88\x9e\n'.decode('utf-8'))
      data = ''.join(orig_lines).encode('utf-8')
      f = BytesIO(data)
  
      reader = LineReader(f)
      lines = list(reader)
  
      assert lines == list(enumerate(orig_lines))
  
  # vim: et sw=4 sts=4
  
subject: Add some tests for the LineReader class