#!/usr/bin/python3.1

import unittest
import email.mime.image


class emailEncoderTestCase(unittest.TestCase):
    def setUp(self):

        bindata = b'\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR\x00\x00\x00 \x00\x00\x00 \x08\x00\x00\x00\x00V\x11%(\x00\x00\x00\x01sRGB\x00\xae\xce\x1c\xe9\x00\x00\x00\tpHYs\x00\x00\x0b\x13\x00\x00\x0b\x13\x01\x00\x9a\x9c\x18\x00\x00\x00\x18IDAT8\xcbc\xfc\xcf\x80\x1f01\x8c*\x18U0\xaa`\x84*\x00\x00\xa3=\x01?\x96"\xc5\xf6\x00\x00\x00\x00IEND\xaeB`\x82'
        self.mimed = email.mime.image.MIMEImage(bindata)

    def test_convert(self):



        base64ed = self.mimed.get_payload()
        # uncoment the print for a visual clarification of the problem.
        #print (base64ed)

        # work out if any line within the string is > 76 chars
        chopped = base64ed.split('\n')
        lengths = [ len(x) for x in chopped ]
        toolong = [ x for x in lengths if x > 76 ]

        msg = 'There is at least one line of ' + str(max(lengths)) + ' chars.'
        self.assertEqual(0, len(toolong), msg)




if __name__ == '__main__':
    unittest.main()