'Test that the function which formats the lines in response to a LIST
command does so appropriately.'

def testListLineFormatter(self):

    listLines = list(pop3.formatListResponse([]))
    self.assertEqual(listLines, ['+OK    0\r\n', '.\r\n'])
    listLines = list(pop3.formatListResponse([1, 2, 3, 100]))
    self.assertEqual(listLines, ['+OK    4\r\n', '1    1\r\n', '2    2\r\n', '3    3\r\n', '4    100\r\n', '.\r\n'])
