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✏️ Editing: test_imap_utf7.py

# Copyright (c) 2014, Menno Smits
# Released subject to the New BSD License
# Please see http://en.wikipedia.org/wiki/BSD_licenses

from __future__ import unicode_literals

from six import text_type, binary_type, int2byte, unichr

from imapclient.imap_utf7 import decode, encode
from imapclient.test.util import unittest

class IMAP4UTF7TestCase(unittest.TestCase):
    tests = [
        ['Foo', b'Foo'],
        ['Foo Bar', b'Foo Bar'],
        ['Stuff & Things', b'Stuff &- Things'],
        ['Hello world', b'Hello world'],
        ['Hello & world', b'Hello &- world'],
        ['Hello\xffworld', b'Hello&AP8-world'],
        ['\xff\xfe\xfd\xfc', b'&AP8A,gD9APw-'],
        ['~peter/mail/\u65e5\u672c\u8a9e/\u53f0\u5317',
         b'~peter/mail/&ZeVnLIqe-/&U,BTFw-'],  # example from RFC 2060
        ['\x00foo', b'&AAA-foo'],
    ]

def test_encode(self):
        for (input, output) in self.tests:
            encoded = encode(input)
            self.assertIsInstance(encoded, binary_type)
            self.assertEqual(encoded, output)

def test_decode(self):
        for (input, output) in self.tests:
            decoded = decode(output)
            self.assertIsInstance(decoded, text_type)
            self.assertEqual(input, decoded)

def test_printable_singletons(self):
        """
        The IMAP4 modified UTF-7 implementation encodes all printable
        characters which are in ASCII using the corresponding ASCII byte.
        """
        # All printables represent themselves
        for o in list(range(0x20, 0x26)) + list(range(0x27, 0x7f)):
            self.assertEqual(int2byte(o), encode(unichr(o)))
            self.assertEqual(unichr(o), decode(int2byte(o)))
        self.assertEqual(encode('&'), b'&-')
        self.assertEqual(encode('&'), b'&-')
        self.assertEqual(decode(b'&-'), '&')

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