Lib/test/test_multibytecodec_support.py

   1 #!/usr/bin/env python
   2 #
   3 # test_multibytecodec_support.py
   4 #   Common Unittest Routines for CJK codecs
   5 #
   6
   7 import sys, codecs, os.path
   8 import unittest
   9 from test import test_support
  10 from StringIO import StringIO
  11
  12 class TestBase:
  13     encoding        = ''   # codec name
  14     codec           = None # codec tuple (with 4 elements)
  15     tstring         = ''   # string to test StreamReader
  16
  17     codectests      = None # must set. codec test tuple
  18     roundtriptest   = 1    # set if roundtrip is possible with unicode
  19     has_iso10646    = 0    # set if this encoding contains whole iso10646 map
  20     xmlcharnametest = None # string to test xmlcharrefreplace
  21     unmappedunicode = u'\udeee' # a unicode codepoint that is not mapped.
  22
  23     def setUp(self):
  24         if self.codec is None:
  25             self.codec = codecs.lookup(self.encoding)
  26         self.encode = self.codec.encode
  27         self.decode = self.codec.decode
  28         self.reader = self.codec.streamreader
  29         self.writer = self.codec.streamwriter
  30         self.incrementalencoder = self.codec.incrementalencoder
  31         self.incrementaldecoder = self.codec.incrementaldecoder
  32
  33     def test_chunkcoding(self):
  34         for native, utf8 in zip(*[StringIO(f).readlines()
  35                                   for f in self.tstring]):
  36             u = self.decode(native)[0]
  37             self.assertEqual(u, utf8.decode('utf-8'))
  38             if self.roundtriptest:
  39                 self.assertEqual(native, self.encode(u)[0])
  40
  41     def test_errorhandle(self):
  42         for source, scheme, expected in self.codectests:
  43             if type(source) == type(''):
  44                 func = self.decode
  45             else:
  46                 func = self.encode
  47             if expected:
  48                 result = func(source, scheme)[0]
  49                 self.assertEqual(result, expected)
  50             else:
  51                 self.assertRaises(UnicodeError, func, source, scheme)
  52
  53     def test_xmlcharrefreplace(self):
  54         if self.has_iso10646:
  55             return
  56
  57         s = u"\u0b13\u0b23\u0b60 nd eggs"
  58         self.assertEqual(
  59             self.encode(s, "xmlcharrefreplace")[0],
  60             "&#2835;&#2851;&#2912; nd eggs"
  61         )
  62
  63     def test_customreplace_encode(self):
  64         if self.has_iso10646:
  65             return
  66
  67         from htmlentitydefs import codepoint2name
  68
  69         def xmlcharnamereplace(exc):
  70             if not isinstance(exc, UnicodeEncodeError):
  71                 raise TypeError("don't know how to handle %r" % exc)
  72             l = []
  73             for c in exc.object[exc.start:exc.end]:
  74                 if ord(c) in codepoint2name:
  75                     l.append(u"&%s;" % codepoint2name[ord(c)])
  76                 else:
  77                     l.append(u"&#%d;" % ord(c))
  78             return (u"".join(l), exc.end)
  79
  80         codecs.register_error("test.xmlcharnamereplace", xmlcharnamereplace)
  81
  82         if self.xmlcharnametest:
  83             sin, sout = self.xmlcharnametest
  84         else:
  85             sin = u"\xab\u211c\xbb = \u2329\u1234\u232a"
  86             sout = "&laquo;&real;&raquo; = &lang;&#4660;&rang;"
  87         self.assertEqual(self.encode(sin,
  88                                     "test.xmlcharnamereplace")[0], sout)
  89
  90     def test_callback_wrong_objects(self):
  91         def myreplace(exc):
  92             return (ret, exc.end)
  93         codecs.register_error("test.cjktest", myreplace)
  94
  95         for ret in ([1, 2, 3], [], None, object(), 'string', ''):
  96             self.assertRaises(TypeError, self.encode, self.unmappedunicode,
  97                               'test.cjktest')
  98
  99     def test_callback_long_index(self):
 100         def myreplace(exc):
 101             return (u'x', long(exc.end))
 102         codecs.register_error("test.cjktest", myreplace)
 103         self.assertEqual(self.encode(u'abcd' + self.unmappedunicode + u'efgh',
 104                                      'test.cjktest'), ('abcdxefgh', 9))
 105
 106         def myreplace(exc):
 107             return (u'x', sys.maxint + 1)
 108         codecs.register_error("test.cjktest", myreplace)
 109         self.assertRaises(IndexError, self.encode, self.unmappedunicode,
 110                           'test.cjktest')
 111
 112     def test_callback_None_index(self):
 113         def myreplace(exc):
 114             return (u'x', None)
 115         codecs.register_error("test.cjktest", myreplace)
 116         self.assertRaises(TypeError, self.encode, self.unmappedunicode,
 117                           'test.cjktest')
 118
 119     def test_callback_backward_index(self):
 120         def myreplace(exc):
 121             if myreplace.limit > 0:
 122                 myreplace.limit -= 1
 123                 return (u'REPLACED', 0)
 124             else:
 125                 return (u'TERMINAL', exc.end)
 126         myreplace.limit = 3
 127         codecs.register_error("test.cjktest", myreplace)
 128         self.assertEqual(self.encode(u'abcd' + self.unmappedunicode + u'efgh',
 129                                      'test.cjktest'),
 130                 ('abcdREPLACEDabcdREPLACEDabcdREPLACEDabcdTERMINALefgh', 9))
 131
 132     def test_callback_forward_index(self):
 133         def myreplace(exc):
 134             return (u'REPLACED', exc.end + 2)
 135         codecs.register_error("test.cjktest", myreplace)
 136         self.assertEqual(self.encode(u'abcd' + self.unmappedunicode + u'efgh',
 137                                      'test.cjktest'), ('abcdREPLACEDgh', 9))
 138
 139     def test_callback_index_outofbound(self):
 140         def myreplace(exc):
 141             return (u'TERM', 100)
 142         codecs.register_error("test.cjktest", myreplace)
 143         self.assertRaises(IndexError, self.encode, self.unmappedunicode,
 144                           'test.cjktest')
 145
 146     def test_incrementalencoder(self):
 147         UTF8Reader = codecs.getreader('utf-8')
 148         for sizehint in [None] + range(1, 33) + \
 149                         [64, 128, 256, 512, 1024]:
 150             istream = UTF8Reader(StringIO(self.tstring[1]))
 151             ostream = StringIO()
 152             encoder = self.incrementalencoder()
 153             while 1:
 154                 if sizehint is not None:
 155                     data = istream.read(sizehint)
 156                 else:
 157                     data = istream.read()
 158
 159                 if not data:
 160                     break
 161                 e = encoder.encode(data)
 162                 ostream.write(e)
 163
 164             self.assertEqual(ostream.getvalue(), self.tstring[0])
 165
 166     def test_incrementaldecoder(self):
 167         UTF8Writer = codecs.getwriter('utf-8')
 168         for sizehint in [None, -1] + range(1, 33) + \
 169                         [64, 128, 256, 512, 1024]:
 170             istream = StringIO(self.tstring[0])
 171             ostream = UTF8Writer(StringIO())
 172             decoder = self.incrementaldecoder()
 173             while 1:
 174                 data = istream.read(sizehint)
 175                 if not data:
 176                     break
 177                 else:
 178                     u = decoder.decode(data)
 179                     ostream.write(u)
 180
 181             self.assertEqual(ostream.getvalue(), self.tstring[1])
 182
 183     def test_incrementalencoder_error_callback(self):
 184         inv = self.unmappedunicode
 185
 186         e = self.incrementalencoder()
 187         self.assertRaises(UnicodeEncodeError, e.encode, inv, True)
 188
 189         e.errors = 'ignore'
 190         self.assertEqual(e.encode(inv, True), '')
 191
 192         e.reset()
 193         def tempreplace(exc):
 194             return (u'called', exc.end)
 195         codecs.register_error('test.incremental_error_callback', tempreplace)
 196         e.errors = 'test.incremental_error_callback'
 197         self.assertEqual(e.encode(inv, True), 'called')
 198
 199         # again
 200         e.errors = 'ignore'
 201         self.assertEqual(e.encode(inv, True), '')
 202
 203     def test_streamreader(self):
 204         UTF8Writer = codecs.getwriter('utf-8')
 205         for name in ["read", "readline", "readlines"]:
 206             for sizehint in [None, -1] + range(1, 33) + \
 207                             [64, 128, 256, 512, 1024]:
 208                 istream = self.reader(StringIO(self.tstring[0]))
 209                 ostream = UTF8Writer(StringIO())
 210                 func = getattr(istream, name)
 211                 while 1:
 212                     data = func(sizehint)
 213                     if not data:
 214                         break
 215                     if name == "readlines":
 216                         ostream.writelines(data)
 217                     else:
 218                         ostream.write(data)
 219
 220                 self.assertEqual(ostream.getvalue(), self.tstring[1])
 221
 222     def test_streamwriter(self):
 223         readfuncs = ('read', 'readline', 'readlines')
 224         UTF8Reader = codecs.getreader('utf-8')
 225         for name in readfuncs:
 226             for sizehint in [None] + range(1, 33) + \
 227                             [64, 128, 256, 512, 1024]:
 228                 istream = UTF8Reader(StringIO(self.tstring[1]))
 229                 ostream = self.writer(StringIO())
 230                 func = getattr(istream, name)
 231                 while 1:
 232                     if sizehint is not None:
 233                         data = func(sizehint)
 234                     else:
 235                         data = func()
 236
 237                     if not data:
 238                         break
 239                     if name == "readlines":
 240                         ostream.writelines(data)
 241                     else:
 242                         ostream.write(data)
 243
 244                 self.assertEqual(ostream.getvalue(), self.tstring[0])
 245
 246 if len(u'\U00012345') == 2: # ucs2 build
 247     _unichr = unichr
 248     def unichr(v):
 249         if v >= 0x10000:
 250             return _unichr(0xd800 + ((v - 0x10000) >> 10)) + \
 251                    _unichr(0xdc00 + ((v - 0x10000) & 0x3ff))
 252         else:
 253             return _unichr(v)
 254     _ord = ord
 255     def ord(c):
 256         if len(c) == 2:
 257             return 0x10000 + ((_ord(c[0]) - 0xd800) << 10) + \
 258                           (ord(c[1]) - 0xdc00)
 259         else:
 260             return _ord(c)
 261
 262 class TestBase_Mapping(unittest.TestCase):
 263     pass_enctest = []
 264     pass_dectest = []
 265     supmaps = []
 266
 267     def __init__(self, *args, **kw):
 268         unittest.TestCase.__init__(self, *args, **kw)
 269         self.open_mapping_file() # test it to report the error early
 270
 271     def open_mapping_file(self):
 272         return test_support.open_urlresource(self.mapfileurl)
 273
 274     def test_mapping_file(self):
 275         unichrs = lambda s: u''.join(map(unichr, map(eval, s.split('+'))))
 276         urt_wa = {}
 277
 278         for line in self.open_mapping_file():
 279             if not line:
 280                 break
 281             data = line.split('#')[0].strip().split()
 282             if len(data) != 2:
 283                 continue
 284
 285             csetval = eval(data[0])
 286             if csetval <= 0x7F:
 287                 csetch = chr(csetval & 0xff)
 288             elif csetval >= 0x1000000:
 289                 csetch = chr(csetval >> 24) + chr((csetval >> 16) & 0xff) + \
 290                          chr((csetval >> 8) & 0xff) + chr(csetval & 0xff)
 291             elif csetval >= 0x10000:
 292                 csetch = chr(csetval >> 16) + \
 293                          chr((csetval >> 8) & 0xff) + chr(csetval & 0xff)
 294             elif csetval >= 0x100:
 295                 csetch = chr(csetval >> 8) + chr(csetval & 0xff)
 296             else:
 297                 continue
 298
 299             unich = unichrs(data[1])
 300             if ord(unich) == 0xfffd or urt_wa.has_key(unich):
 301                 continue
 302             urt_wa[unich] = csetch
 303
 304             self._testpoint(csetch, unich)
 305
 306     def test_mapping_supplemental(self):
 307         for mapping in self.supmaps:
 308             self._testpoint(*mapping)
 309
 310     def _testpoint(self, csetch, unich):
 311         if (csetch, unich) not in self.pass_enctest:
 312             self.assertEqual(unich.encode(self.encoding), csetch)
 313         if (csetch, unich) not in self.pass_dectest:
 314             self.assertEqual(unicode(csetch, self.encoding), unich)
 315
 316 def load_teststring(encoding):
 317     from test import cjkencodings_test
 318     return cjkencodings_test.teststring[encoding]