# The contents of this file has been derived code from the Twisted project
# (http://twistedmatrix.com/). The original author is Jp Calderone.

# Twisted project license follows:

# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
# 
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

from imapclient.imap_utf7 import decode, encode
import unittest


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

    def test_encode(self):
        for (input, output) in self.tests:
            self.assertEquals(encode(input), output)


    def test_decode(self):
        for (input, output) in self.tests:
            self.assertEquals(input, decode(output))


    def test_printableSingletons(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 range(0x20, 0x26) + range(0x27, 0x7f):
            self.failUnlessEqual(chr(o), encode(chr(o)))
            self.failUnlessEqual(chr(o), decode(chr(o)))
        self.failUnlessEqual(encode('&'), '&-')
        self.failUnlessEqual(decode('&-'), '&')


# The contents of this file has been derived code from the Twisted project
# (http://twistedmatrix.com/). The original author is Jp Calderone.

# Twisted project license follows:

# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
# 
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

from imapclient.imap_utf7 import decode, encode
import unittest


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

    def test_encode(self):
        for (input, output) in self.tests:
            self.assertEquals(encode(input), output)


    def test_decode(self):
        for (input, output) in self.tests:
            self.assertEquals(input, decode(output))


    def test_printableSingletons(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 range(0x20, 0x26) + range(0x27, 0x7f):
            self.failUnlessEqual(chr(o), encode(chr(o)))
            self.failUnlessEqual(chr(o), decode(chr(o)))
        self.failUnlessEqual(encode('&'), '&-')
        self.failUnlessEqual(decode('&-'), '&')

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

Allow this test to be run standalone