'read_some()
Read at least one byte or EOF; may block.'

def test_read_some(self):

    telnet = test_telnet([('x' * 500)])
    data = telnet.read_some()
    self.assertTrue((len(data) >= 1))
    telnet = test_telnet()
    data = telnet.read_some()
    self.assertEqual('', data)
