'Calling L{_InputStream.readlines} with L{None} as an argument returns
all lines from the input.'

def test_readlinesNone(self):

    bytes = 'one    fish\ntwo    fish\n'
    d = self._renderAndReturnReaderResult((lambda input: input.readlines(None)), bytes)
    d.addCallback(self.assertEqual, ['one    fish\n', 'two    fish\n'])
    return d
