cpython/Lib/email/test/test_email_codecs.py

# Copyright (C) 2002 Python Software Foundation
# email package unit tests for (optional) Asian codecs

import unittest
from test.test_support import TestSkipped, run_unittest

from email.test.test_email import TestEmailBase
from email.Charset import Charset
from email.Header import Header, decode_header

# See if we have the Japanese codecs package installed
try:
    unicode('foo', 'japanese.iso-2022-jp')
except LookupError:
    raise TestSkipped, 'Optional Japanese codecs not installed'



class TestEmailAsianCodecs(TestEmailBase):
    def test_japanese_codecs(self):
        eq = self.ndiffAssertEqual
        j = Charset("euc-jp")
        g = Charset("iso-8859-1")
        h = Header("Hello World!")
        jhello = '\xa5\xcf\xa5\xed\xa1\xbc\xa5\xef\xa1\xbc\xa5\xeb\xa5\xc9\xa1\xaa'
        ghello = 'Gr\xfc\xdf Gott!'
        h.append(jhello, j)
        h.append(ghello, g)
        # BAW: This used to -- and maybe should -- fold the two iso-8859-1
        # chunks into a single encoded word.  However it doesn't violate the
        # standard to have them as two encoded chunks and maybe it's
        # reasonable <wink> for each .append() call to result in a separate
        # encoded word.
        eq(h.encode(), """\
Hello World! =?iso-2022-jp?b?GyRCJU8lbSE8JW8hPCVrJUkhKhsoQg==?=
 =?iso-8859-1?q?Gr=FC=DF?= =?iso-8859-1?q?_Gott!?=""")
        eq(decode_header(h.encode()),
           [('Hello World!', None),
            ('\x1b$B%O%m!<%o!<%k%I!*\x1b(B', 'iso-2022-jp'),
            ('Gr\xfc\xdf Gott!', 'iso-8859-1')])
        long = 'test-ja \xa4\xd8\xc5\xea\xb9\xc6\xa4\xb5\xa4\xec\xa4\xbf\xa5\xe1\xa1\xbc\xa5\xeb\xa4\xcf\xbb\xca\xb2\xf1\xbc\xd4\xa4\xce\xbe\xb5\xc7\xa7\xa4\xf2\xc2\xd4\xa4\xc3\xa4\xc6\xa4\xa4\xa4\xde\xa4\xb9'
        h = Header(long, j, header_name="Subject")
        # test a very long header
        enc = h.encode()
        # TK: splitting point may differ by codec design and/or Header encoding
        eq(enc , """\
=?iso-2022-jp?b?dGVzdC1qYSAbJEIkWEVqOUYkNSRsJD8lYSE8JWskTztKGyhC?=
 =?iso-2022-jp?b?GyRCMnE8VCROPjVHJyRyQlQkQyRGJCQkXiQ5GyhC?=""")
        # TK: full decode comparison
        eq(h.__unicode__().encode('euc-jp'), long)



def suite():
    suite = unittest.TestSuite()
    suite.addTest(unittest.makeSuite(TestEmailAsianCodecs))
    return suite


def test_main():
    run_unittest(TestEmailAsianCodecs)


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