text: from test import test_support
  import unittest
  import codecs
  import locale
  import sys, StringIO, _testcapi
  
  class Queue(object):
      """
      queue: write bytes at one end, read bytes from the other end
      """
      def __init__(self):
          self._buffer = ""
  
      def write(self, chars):
          self._buffer += chars
  
      def read(self, size=-1):
          if size<0:
              s = self._buffer
              self._buffer = ""
              return s
          else:
              s = self._buffer[:size]
              self._buffer = self._buffer[size:]
              return s
  
  class ReadTest(unittest.TestCase):
      def check_partial(self, input, partialresults):
          # get a StreamReader for the encoding and feed the bytestring version
          # of input to the reader byte by byte. Read everything available from
          # the StreamReader and check that the results equal the appropriate
          # entries from partialresults.
          q = Queue()
          r = codecs.getreader(self.encoding)(q)
          result = u""
          for (c, partialresult) in zip(input.encode(self.encoding), partialresults):
              q.write(c)
              result += r.read()
              self.assertEqual(result, partialresult)
          # check that there's nothing left in the buffers
          self.assertEqual(r.read(), u"")
          self.assertEqual(r.bytebuffer, "")
          self.assertEqual(r.charbuffer, u"")
  
          # do the check again, this time using a incremental decoder
          d = codecs.getincrementaldecoder(self.encoding)()
          result = u""
          for (c, partialresult) in zip(input.encode(self.encoding), partialresults):
              result += d.decode(c)
              self.assertEqual(result, partialresult)
          # check that there's nothing left in the buffers
          self.assertEqual(d.decode("", True), u"")
          self.assertEqual(d.buffer, "")
  
          # Check whether the reset method works properly
          d.reset()
          result = u""
          for (c, partialresult) in zip(input.encode(self.encoding), partialresults):
              result += d.decode(c)
              self.assertEqual(result, partialresult)
          # check that there's nothing left in the buffers
          self.assertEqual(d.decode("", True), u"")
          self.assertEqual(d.buffer, "")
  
          # check iterdecode()
          encoded = input.encode(self.encoding)
          self.assertEqual(
              input,
              u"".join(codecs.iterdecode(encoded, self.encoding))
          )
  
      def test_readline(self):
          def getreader(input):
              stream = StringIO.StringIO(input.encode(self.encoding))
              return codecs.getreader(self.encoding)(stream)
  
          def readalllines(input, keepends=True, size=None):
              reader = getreader(input)
              lines = []
              while True:
                  line = reader.readline(size=size, keepends=keepends)
                  if not line:
                      break
                  lines.append(line)
              return "|".join(lines)
  
          s = u"foo\nbar\r\nbaz\rspam\u2028eggs"
          sexpected = u"foo\n|bar\r\n|baz\r|spam\u2028|eggs"
          sexpectednoends = u"foo|bar|baz|spam|eggs"
          self.assertEqual(readalllines(s, True), sexpected)
          self.assertEqual(readalllines(s, False), sexpectednoends)
          self.assertEqual(readalllines(s, True, 10), sexpected)
          self.assertEqual(readalllines(s, False, 10), sexpectednoends)
  
          # Test long lines (multiple calls to read() in readline())
          vw = []
          vwo = []
          for (i, lineend) in enumerate(u"\n \r\n \r \u2028".split()):
              vw.append((i*200)*u"\3042" + lineend)
              vwo.append((i*200)*u"\3042")
          self.assertEqual(readalllines("".join(vw), True), "".join(vw))
          self.assertEqual(readalllines("".join(vw), False),"".join(vwo))
  
          # Test lines where the first read might end with \r, so the
          # reader has to look ahead whether this is a lone \r or a \r\n
          for size in xrange(80):
              for lineend in u"\n \r\n \r \u2028".split():
                  s = 10*(size*u"a" + lineend + u"xxx\n")
                  reader = getreader(s)
                  for i in xrange(10):
                      self.assertEqual(
                          reader.readline(keepends=True),
                          size*u"a" + lineend,
                      )
                  reader = getreader(s)
                  for i in xrange(10):
                      self.assertEqual(
                          reader.readline(keepends=False),
                          size*u"a",
                      )
  
      def test_bug1175396(self):
          s = [
              '<%!--===================================================\r\n',
              '    BLOG index page: show recent articles,\r\n',
              '    today\'s articles, or articles of a specific date.\r\n',
              '========================================================--%>\r\n',
              '<%@inputencoding="ISO-8859-1"%>\r\n',
              '<%@pagetemplate=TEMPLATE.y%>\r\n',
              '<%@import=import frog.util, frog%>\r\n',
              '<%@import=import frog.objects%>\r\n',
              '<%@import=from frog.storageerrors import StorageError%>\r\n',
              '<%\r\n',
              '\r\n',
              'import logging\r\n',
              'log=logging.getLogger("Snakelets.logger")\r\n',
              '\r\n',
              '\r\n',
              'user=self.SessionCtx.user\r\n',
              'storageEngine=self.SessionCtx.storageEngine\r\n',
              '\r\n',
              '\r\n',
              'def readArticlesFromDate(date, count=None):\r\n',
              '    entryids=storageEngine.listBlogEntries(date)\r\n',
              '    entryids.reverse() # descending\r\n',
              '    if count:\r\n',
              '        entryids=entryids[:count]\r\n',
              '    try:\r\n',
              '        return [ frog.objects.BlogEntry.load(storageEngine, date, Id) for Id in entryids ]\r\n',
              '    except StorageError,x:\r\n',
              '        log.error("Error loading articles: "+str(x))\r\n',
              '        self.abort("cannot load articles")\r\n',
              '\r\n',
              'showdate=None\r\n',
              '\r\n',
              'arg=self.Request.getArg()\r\n',
              'if arg=="today":\r\n',
              '    #-------------------- TODAY\'S ARTICLES\r\n',
              '    self.write("<h2>Today\'s articles</h2>")\r\n',
              '    showdate = frog.util.isodatestr() \r\n',
              '    entries = readArticlesFromDate(showdate)\r\n',
              'elif arg=="active":\r\n',
              '    #-------------------- ACTIVE ARTICLES redirect\r\n',
              '    self.Yredirect("active.y")\r\n',
              'elif arg=="login":\r\n',
              '    #-------------------- LOGIN PAGE redirect\r\n',
              '    self.Yredirect("login.y")\r\n',
              'elif arg=="date":\r\n',
              '    #-------------------- ARTICLES OF A SPECIFIC DATE\r\n',
              '    showdate = self.Request.getParameter("date")\r\n',
              '    self.write("<h2>Articles written on %s</h2>"% frog.util.mediumdatestr(showdate))\r\n',
              '    entries = readArticlesFromDate(showdate)\r\n',
              'else:\r\n',
              '    #-------------------- RECENT ARTICLES\r\n',
              '    self.write("<h2>Recent articles</h2>")\r\n',
              '    dates=storageEngine.listBlogEntryDates()\r\n',
              '    if dates:\r\n',
              '        entries=[]\r\n',
              '        SHOWAMOUNT=10\r\n',
              '        for showdate in dates:\r\n',
              '            entries.extend( readArticlesFromDate(showdate, SHOWAMOUNT-len(entries)) )\r\n',
              '            if len(entries)>=SHOWAMOUNT:\r\n',
              '                break\r\n',
              '                \r\n',
          ]
          stream = StringIO.StringIO("".join(s).encode(self.encoding))
          reader = codecs.getreader(self.encoding)(stream)
          for (i, line) in enumerate(reader):
              self.assertEqual(line, s[i])
  
      def test_readlinequeue(self):
          q = Queue()
          writer = codecs.getwriter(self.encoding)(q)
          reader = codecs.getreader(self.encoding)(q)
  
          # No lineends
          writer.write(u"foo\r")
          self.assertEqual(reader.readline(keepends=False), u"foo")
          writer.write(u"\nbar\r")
          self.assertEqual(reader.readline(keepends=False), u"")
          self.assertEqual(reader.readline(keepends=False), u"bar")
          writer.write(u"baz")
          self.assertEqual(reader.readline(keepends=False), u"baz")
          self.assertEqual(reader.readline(keepends=False), u"")
  
          # Lineends
          writer.write(u"foo\r")
          self.assertEqual(reader.readline(keepends=True), u"foo\r")
          writer.write(u"\nbar\r")
          self.assertEqual(reader.readline(keepends=True), u"\n")
          self.assertEqual(reader.readline(keepends=True), u"bar\r")
          writer.write(u"baz")
          self.assertEqual(reader.readline(keepends=True), u"baz")
          self.assertEqual(reader.readline(keepends=True), u"")
          writer.write(u"foo\r\n")
          self.assertEqual(reader.readline(keepends=True), u"foo\r\n")
  
      def test_bug1098990_a(self):
          s1 = u"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy\r\n"
          s2 = u"offending line: ladfj askldfj klasdj fskla dfzaskdj fasklfj laskd fjasklfzzzzaa%whereisthis!!!\r\n"
          s3 = u"next line.\r\n"
  
          s = (s1+s2+s3).encode(self.encoding)
          stream = StringIO.StringIO(s)
          reader = codecs.getreader(self.encoding)(stream)
          self.assertEqual(reader.readline(), s1)
          self.assertEqual(reader.readline(), s2)
          self.assertEqual(reader.readline(), s3)
          self.assertEqual(reader.readline(), u"")
  
      def test_bug1098990_b(self):
          s1 = u"aaaaaaaaaaaaaaaaaaaaaaaa\r\n"
          s2 = u"bbbbbbbbbbbbbbbbbbbbbbbb\r\n"
          s3 = u"stillokay:bbbbxx\r\n"
          s4 = u"broken!!!!badbad\r\n"
          s5 = u"againokay.\r\n"
  
          s = (s1+s2+s3+s4+s5).encode(self.encoding)
          stream = StringIO.StringIO(s)
          reader = codecs.getreader(self.encoding)(stream)
          self.assertEqual(reader.readline(), s1)
          self.assertEqual(reader.readline(), s2)
          self.assertEqual(reader.readline(), s3)
          self.assertEqual(reader.readline(), s4)
          self.assertEqual(reader.readline(), s5)
          self.assertEqual(reader.readline(), u"")
  
  class UTF32Test(ReadTest):
      encoding = "utf-32"
  
      spamle = ('\xff\xfe\x00\x00'
                's\x00\x00\x00p\x00\x00\x00a\x00\x00\x00m\x00\x00\x00'
                's\x00\x00\x00p\x00\x00\x00a\x00\x00\x00m\x00\x00\x00')
      spambe = ('\x00\x00\xfe\xff'
                '\x00\x00\x00s\x00\x00\x00p\x00\x00\x00a\x00\x00\x00m'
                '\x00\x00\x00s\x00\x00\x00p\x00\x00\x00a\x00\x00\x00m')
  
      def test_only_one_bom(self):
          _,_,reader,writer = codecs.lookup(self.encoding)
          # encode some stream
          s = StringIO.StringIO()
          f = writer(s)
          f.write(u"spam")
          f.write(u"spam")
          d = s.getvalue()
          # check whether there is exactly one BOM in it
          self.assertTrue(d == self.spamle or d == self.spambe)
          # try to read it back
          s = StringIO.StringIO(d)
          f = reader(s)
          self.assertEqual(f.read(), u"spamspam")
  
      def test_badbom(self):
          s = StringIO.StringIO(4*"\xff")
          f = codecs.getreader(self.encoding)(s)
          self.assertRaises(UnicodeError, f.read)
  
          s = StringIO.StringIO(8*"\xff")
          f = codecs.getreader(self.encoding)(s)
          self.assertRaises(UnicodeError, f.read)
  
      def test_partial(self):
          self.check_partial(
              u"\x00\xff\u0100\uffff",
              [
                  u"", # first byte of BOM read
                  u"", # second byte of BOM read
                  u"", # third byte of BOM read
                  u"", # fourth byte of BOM read => byteorder known
                  u"",
                  u"",
                  u"",
                  u"\x00",
                  u"\x00",
                  u"\x00",
                  u"\x00",
                  u"\x00\xff",
                  u"\x00\xff",
                  u"\x00\xff",
                  u"\x00\xff",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100\uffff",
              ]
          )
  
      def test_handlers(self):
          self.assertEqual((u'\ufffd', 1),
                           codecs.utf_32_decode('\x01', 'replace', True))
          self.assertEqual((u'', 1),
                           codecs.utf_32_decode('\x01', 'ignore', True))
  
      def test_errors(self):
          self.assertRaises(UnicodeDecodeError, codecs.utf_32_decode,
                            "\xff", "strict", True)
  
      def test_issue8941(self):
          # Issue #8941: insufficient result allocation when decoding into
          # surrogate pairs on UCS-2 builds.
          encoded_le = '\xff\xfe\x00\x00' + '\x00\x00\x01\x00' * 1024
          self.assertEqual(u'\U00010000' * 1024,
                           codecs.utf_32_decode(encoded_le)[0])
          encoded_be = '\x00\x00\xfe\xff' + '\x00\x01\x00\x00' * 1024
          self.assertEqual(u'\U00010000' * 1024,
                           codecs.utf_32_decode(encoded_be)[0])
  
  class UTF32LETest(ReadTest):
      encoding = "utf-32-le"
  
      def test_partial(self):
          self.check_partial(
              u"\x00\xff\u0100\uffff",
              [
                  u"",
                  u"",
                  u"",
                  u"\x00",
                  u"\x00",
                  u"\x00",
                  u"\x00",
                  u"\x00\xff",
                  u"\x00\xff",
                  u"\x00\xff",
                  u"\x00\xff",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100\uffff",
              ]
          )
  
      def test_simple(self):
          self.assertEqual(u"\U00010203".encode(self.encoding), "\x03\x02\x01\x00")
  
      def test_errors(self):
          self.assertRaises(UnicodeDecodeError, codecs.utf_32_le_decode,
                            "\xff", "strict", True)
  
      def test_issue8941(self):
          # Issue #8941: insufficient result allocation when decoding into
          # surrogate pairs on UCS-2 builds.
          encoded = '\x00\x00\x01\x00' * 1024
          self.assertEqual(u'\U00010000' * 1024,
                           codecs.utf_32_le_decode(encoded)[0])
  
  class UTF32BETest(ReadTest):
      encoding = "utf-32-be"
  
      def test_partial(self):
          self.check_partial(
              u"\x00\xff\u0100\uffff",
              [
                  u"",
                  u"",
                  u"",
                  u"\x00",
                  u"\x00",
                  u"\x00",
                  u"\x00",
                  u"\x00\xff",
                  u"\x00\xff",
                  u"\x00\xff",
                  u"\x00\xff",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100\uffff",
              ]
          )
  
      def test_simple(self):
          self.assertEqual(u"\U00010203".encode(self.encoding), "\x00\x01\x02\x03")
  
      def test_errors(self):
          self.assertRaises(UnicodeDecodeError, codecs.utf_32_be_decode,
                            "\xff", "strict", True)
  
      def test_issue8941(self):
          # Issue #8941: insufficient result allocation when decoding into
          # surrogate pairs on UCS-2 builds.
          encoded = '\x00\x01\x00\x00' * 1024
          self.assertEqual(u'\U00010000' * 1024,
                           codecs.utf_32_be_decode(encoded)[0])
  
  
  class UTF16Test(ReadTest):
      encoding = "utf-16"
  
      spamle = '\xff\xfes\x00p\x00a\x00m\x00s\x00p\x00a\x00m\x00'
      spambe = '\xfe\xff\x00s\x00p\x00a\x00m\x00s\x00p\x00a\x00m'
  
      def test_only_one_bom(self):
          _,_,reader,writer = codecs.lookup(self.encoding)
          # encode some stream
          s = StringIO.StringIO()
          f = writer(s)
          f.write(u"spam")
          f.write(u"spam")
          d = s.getvalue()
          # check whether there is exactly one BOM in it
          self.assertTrue(d == self.spamle or d == self.spambe)
          # try to read it back
          s = StringIO.StringIO(d)
          f = reader(s)
          self.assertEqual(f.read(), u"spamspam")
  
      def test_badbom(self):
          s = StringIO.StringIO("\xff\xff")
          f = codecs.getreader(self.encoding)(s)
          self.assertRaises(UnicodeError, f.read)
  
          s = StringIO.StringIO("\xff\xff\xff\xff")
          f = codecs.getreader(self.encoding)(s)
          self.assertRaises(UnicodeError, f.read)
  
      def test_partial(self):
          self.check_partial(
              u"\x00\xff\u0100\uffff",
              [
                  u"", # first byte of BOM read
                  u"", # second byte of BOM read => byteorder known
                  u"",
                  u"\x00",
                  u"\x00",
                  u"\x00\xff",
                  u"\x00\xff",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100\uffff",
              ]
          )
  
      def test_handlers(self):
          self.assertEqual((u'\ufffd', 1),
                           codecs.utf_16_decode('\x01', 'replace', True))
          self.assertEqual((u'', 1),
                           codecs.utf_16_decode('\x01', 'ignore', True))
  
      def test_errors(self):
          self.assertRaises(UnicodeDecodeError, codecs.utf_16_decode, "\xff", "strict", True)
  
      def test_bug691291(self):
          # Files are always opened in binary mode, even if no binary mode was
          # specified.  This means that no automatic conversion of '\n' is done
          # on reading and writing.
          s1 = u'Hello\r\nworld\r\n'
  
          s = s1.encode(self.encoding)
          self.addCleanup(test_support.unlink, test_support.TESTFN)
          with open(test_support.TESTFN, 'wb') as fp:
              fp.write(s)
          with codecs.open(test_support.TESTFN, 'U', encoding=self.encoding) as reader:
              self.assertEqual(reader.read(), s1)
  
  class UTF16LETest(ReadTest):
      encoding = "utf-16-le"
  
      def test_partial(self):
          self.check_partial(
              u"\x00\xff\u0100\uffff",
              [
                  u"",
                  u"\x00",
                  u"\x00",
                  u"\x00\xff",
                  u"\x00\xff",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100\uffff",
              ]
          )
  
      def test_errors(self):
          tests = [
              (b'\xff', u'\ufffd'),
              (b'A\x00Z', u'A\ufffd'),
              (b'A\x00B\x00C\x00D\x00Z', u'ABCD\ufffd'),
              (b'\x00\xd8', u'\ufffd'),
              (b'\x00\xd8A', u'\ufffd'),
              (b'\x00\xd8A\x00', u'\ufffdA'),
              (b'\x00\xdcA\x00', u'\ufffdA'),
          ]
          for raw, expected in tests:
              self.assertRaises(UnicodeDecodeError, codecs.utf_16_le_decode,
                                raw, 'strict', True)
              self.assertEqual(raw.decode('utf-16le', 'replace'), expected)
  
  class UTF16BETest(ReadTest):
      encoding = "utf-16-be"
  
      def test_partial(self):
          self.check_partial(
              u"\x00\xff\u0100\uffff",
              [
                  u"",
                  u"\x00",
                  u"\x00",
                  u"\x00\xff",
                  u"\x00\xff",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100",
                  u"\x00\xff\u0100\uffff",
              ]
          )
  
      def test_errors(self):
          tests = [
              (b'\xff', u'\ufffd'),
              (b'\x00A\xff', u'A\ufffd'),
              (b'\x00A\x00B\x00C\x00DZ', u'ABCD\ufffd'),
              (b'\xd8\x00', u'\ufffd'),
              (b'\xd8\x00\xdc', u'\ufffd'),
              (b'\xd8\x00\x00A', u'\ufffdA'),
              (b'\xdc\x00\x00A', u'\ufffdA'),
          ]
          for raw, expected in tests:
              self.assertRaises(UnicodeDecodeError, codecs.utf_16_be_decode,
                                raw, 'strict', True)
              self.assertEqual(raw.decode('utf-16be', 'replace'), expected)
  
  class UTF8Test(ReadTest):
      encoding = "utf-8"
  
      def test_partial(self):
          self.check_partial(
              u"\x00\xff\u07ff\u0800\uffff",
              [
                  u"\x00",
                  u"\x00",
                  u"\x00\xff",
                  u"\x00\xff",
                  u"\x00\xff\u07ff",
                  u"\x00\xff\u07ff",
                  u"\x00\xff\u07ff",
                  u"\x00\xff\u07ff\u0800",
                  u"\x00\xff\u07ff\u0800",
                  u"\x00\xff\u07ff\u0800",
                  u"\x00\xff\u07ff\u0800\uffff",
              ]
          )
  
  class UTF7Test(ReadTest):
      encoding = "utf-7"
  
      def test_partial(self):
          self.check_partial(
              u"a+-b",
              [
                  u"a",
                  u"a",
                  u"a+",
                  u"a+-",
                  u"a+-b",
              ]
          )
  
  class UTF16ExTest(unittest.TestCase):
  
      def test_errors(self):
          self.assertRaises(UnicodeDecodeError, codecs.utf_16_ex_decode, "\xff", "strict", 0, True)
  
      def test_bad_args(self):
          self.assertRaises(TypeError, codecs.utf_16_ex_decode)
  
  class ReadBufferTest(unittest.TestCase):
  
      def test_array(self):
          import array
          self.assertEqual(
              codecs.readbuffer_encode(array.array("c", "spam")),
              ("spam", 4)
          )
  
      def test_empty(self):
          self.assertEqual(codecs.readbuffer_encode(""), ("", 0))
  
      def test_bad_args(self):
          self.assertRaises(TypeError, codecs.readbuffer_encode)
          self.assertRaises(TypeError, codecs.readbuffer_encode, 42)
  
  class CharBufferTest(unittest.TestCase):
  
      def test_string(self):
          self.assertEqual(codecs.charbuffer_encode("spam"), ("spam", 4))
  
      def test_empty(self):
          self.assertEqual(codecs.charbuffer_encode(""), ("", 0))
  
      def test_bad_args(self):
          self.assertRaises(TypeError, codecs.charbuffer_encode)
          self.assertRaises(TypeError, codecs.charbuffer_encode, 42)
  
  class UTF8SigTest(ReadTest):
      encoding = "utf-8-sig"
  
      def test_partial(self):
          self.check_partial(
              u"\ufeff\x00\xff\u07ff\u0800\uffff",
              [
                  u"",
                  u"",
                  u"", # First BOM has been read and skipped
                  u"",
                  u"",
                  u"\ufeff", # Second BOM has been read and emitted
                  u"\ufeff\x00", # "\x00" read and emitted
                  u"\ufeff\x00", # First byte of encoded u"\xff" read
                  u"\ufeff\x00\xff", # Second byte of encoded u"\xff" read
                  u"\ufeff\x00\xff", # First byte of encoded u"\u07ff" read
                  u"\ufeff\x00\xff\u07ff", # Second byte of encoded u"\u07ff" read
                  u"\ufeff\x00\xff\u07ff",
                  u"\ufeff\x00\xff\u07ff",
                  u"\ufeff\x00\xff\u07ff\u0800",
                  u"\ufeff\x00\xff\u07ff\u0800",
                  u"\ufeff\x00\xff\u07ff\u0800",
                  u"\ufeff\x00\xff\u07ff\u0800\uffff",
              ]
          )
  
      def test_bug1601501(self):
          # SF bug #1601501: check that the codec works with a buffer
          unicode("\xef\xbb\xbf", "utf-8-sig")
  
      def test_bom(self):
          d = codecs.getincrementaldecoder("utf-8-sig")()
          s = u"spam"
          self.assertEqual(d.decode(s.encode("utf-8-sig")), s)
  
      def test_stream_bom(self):
          unistring = u"ABC\u00A1\u2200XYZ"
          bytestring = codecs.BOM_UTF8 + "ABC\xC2\xA1\xE2\x88\x80XYZ"
  
          reader = codecs.getreader("utf-8-sig")
          for sizehint in [None] + range(1, 11) + \
                          [64, 128, 256, 512, 1024]:
              istream = reader(StringIO.StringIO(bytestring))
              ostream = StringIO.StringIO()
              while 1:
                  if sizehint is not None:
                      data = istream.read(sizehint)
                  else:
                      data = istream.read()
  
                  if not data:
                      break
                  ostream.write(data)
  
              got = ostream.getvalue()
              self.assertEqual(got, unistring)
  
      def test_stream_bare(self):
          unistring = u"ABC\u00A1\u2200XYZ"
          bytestring = "ABC\xC2\xA1\xE2\x88\x80XYZ"
  
          reader = codecs.getreader("utf-8-sig")
          for sizehint in [None] + range(1, 11) + \
                          [64, 128, 256, 512, 1024]:
              istream = reader(StringIO.StringIO(bytestring))
              ostream = StringIO.StringIO()
              while 1:
                  if sizehint is not None:
                      data = istream.read(sizehint)
                  else:
                      data = istream.read()
  
                  if not data:
                      break
                  ostream.write(data)
  
              got = ostream.getvalue()
              self.assertEqual(got, unistring)
  
  class EscapeDecodeTest(unittest.TestCase):
      def test_empty(self):
          self.assertEqual(codecs.escape_decode(""), ("", 0))
  
  class RecodingTest(unittest.TestCase):
      def test_recoding(self):
          f = StringIO.StringIO()
          f2 = codecs.EncodedFile(f, "unicode_internal", "utf-8")
          f2.write(u"a")
          f2.close()
          # Python used to crash on this at exit because of a refcount
          # bug in _codecsmodule.c
  
  # From RFC 3492
  punycode_testcases = [
      # A Arabic (Egyptian):
      (u"\u0644\u064A\u0647\u0645\u0627\u0628\u062A\u0643\u0644"
       u"\u0645\u0648\u0634\u0639\u0631\u0628\u064A\u061F",
       "egbpdaj6bu4bxfgehfvwxn"),
      # B Chinese (simplified):
      (u"\u4ED6\u4EEC\u4E3A\u4EC0\u4E48\u4E0D\u8BF4\u4E2D\u6587",
       "ihqwcrb4cv8a8dqg056pqjye"),
      # C Chinese (traditional):
      (u"\u4ED6\u5011\u7232\u4EC0\u9EBD\u4E0D\u8AAA\u4E2D\u6587",
       "ihqwctvzc91f659drss3x8bo0yb"),
      # D Czech: Pro<ccaron>prost<ecaron>nemluv<iacute><ccaron>esky
      (u"\u0050\u0072\u006F\u010D\u0070\u0072\u006F\u0073\u0074"
       u"\u011B\u006E\u0065\u006D\u006C\u0075\u0076\u00ED\u010D"
       u"\u0065\u0073\u006B\u0079",
       "Proprostnemluvesky-uyb24dma41a"),
      # E Hebrew:
      (u"\u05DC\u05DE\u05D4\u05D4\u05DD\u05E4\u05E9\u05D5\u05D8"
       u"\u05DC\u05D0\u05DE\u05D3\u05D1\u05E8\u05D9\u05DD\u05E2"
       u"\u05D1\u05E8\u05D9\u05EA",
       "4dbcagdahymbxekheh6e0a7fei0b"),
      # F Hindi (Devanagari):
      (u"\u092F\u0939\u0932\u094B\u0917\u0939\u093F\u0928\u094D"
      u"\u0926\u0940\u0915\u094D\u092F\u094B\u0902\u0928\u0939"
      u"\u0940\u0902\u092C\u094B\u0932\u0938\u0915\u0924\u0947"
      u"\u0939\u0948\u0902",
      "i1baa7eci9glrd9b2ae1bj0hfcgg6iyaf8o0a1dig0cd"),
  
      #(G) Japanese (kanji and hiragana):
      (u"\u306A\u305C\u307F\u3093\u306A\u65E5\u672C\u8A9E\u3092"
      u"\u8A71\u3057\u3066\u304F\u308C\u306A\u3044\u306E\u304B",
       "n8jok5ay5dzabd5bym9f0cm5685rrjetr6pdxa"),
  
      # (H) Korean (Hangul syllables):
      (u"\uC138\uACC4\uC758\uBAA8\uB4E0\uC0AC\uB78C\uB4E4\uC774"
       u"\uD55C\uAD6D\uC5B4\uB97C\uC774\uD574\uD55C\uB2E4\uBA74"
       u"\uC5BC\uB9C8\uB098\uC88B\uC744\uAE4C",
       "989aomsvi5e83db1d2a355cv1e0vak1dwrv93d5xbh15a0dt30a5j"
       "psd879ccm6fea98c"),
  
      # (I) Russian (Cyrillic):
      (u"\u043F\u043E\u0447\u0435\u043C\u0443\u0436\u0435\u043E"
       u"\u043D\u0438\u043D\u0435\u0433\u043E\u0432\u043E\u0440"
       u"\u044F\u0442\u043F\u043E\u0440\u0443\u0441\u0441\u043A"
       u"\u0438",
       "b1abfaaepdrnnbgefbaDotcwatmq2g4l"),
  
      # (J) Spanish: Porqu<eacute>nopuedensimplementehablarenEspa<ntilde>ol
      (u"\u0050\u006F\u0072\u0071\u0075\u00E9\u006E\u006F\u0070"
       u"\u0075\u0065\u0064\u0065\u006E\u0073\u0069\u006D\u0070"
       u"\u006C\u0065\u006D\u0065\u006E\u0074\u0065\u0068\u0061"
       u"\u0062\u006C\u0061\u0072\u0065\u006E\u0045\u0073\u0070"
       u"\u0061\u00F1\u006F\u006C",
       "PorqunopuedensimplementehablarenEspaol-fmd56a"),
  
      # (K) Vietnamese:
      #  T<adotbelow>isaoh<odotbelow>kh<ocirc>ngth<ecirchookabove>ch\
      #   <ihookabove>n<oacute>iti<ecircacute>ngVi<ecircdotbelow>t
      (u"\u0054\u1EA1\u0069\u0073\u0061\u006F\u0068\u1ECD\u006B"
       u"\u0068\u00F4\u006E\u0067\u0074\u0068\u1EC3\u0063\u0068"
       u"\u1EC9\u006E\u00F3\u0069\u0074\u0069\u1EBF\u006E\u0067"
       u"\u0056\u0069\u1EC7\u0074",
       "TisaohkhngthchnitingVit-kjcr8268qyxafd2f1b9g"),
  
      #(L) 3<nen>B<gumi><kinpachi><sensei>
      (u"\u0033\u5E74\u0042\u7D44\u91D1\u516B\u5148\u751F",
       "3B-ww4c5e180e575a65lsy2b"),
  
      # (M) <amuro><namie>-with-SUPER-MONKEYS
      (u"\u5B89\u5BA4\u5948\u7F8E\u6075\u002D\u0077\u0069\u0074"
       u"\u0068\u002D\u0053\u0055\u0050\u0045\u0052\u002D\u004D"
       u"\u004F\u004E\u004B\u0045\u0059\u0053",
       "-with-SUPER-MONKEYS-pc58ag80a8qai00g7n9n"),
  
      # (N) Hello-Another-Way-<sorezore><no><basho>
      (u"\u0048\u0065\u006C\u006C\u006F\u002D\u0041\u006E\u006F"
       u"\u0074\u0068\u0065\u0072\u002D\u0057\u0061\u0079\u002D"
       u"\u305D\u308C\u305E\u308C\u306E\u5834\u6240",
       "Hello-Another-Way--fc4qua05auwb3674vfr0b"),
  
      # (O) <hitotsu><yane><no><shita>2
      (u"\u3072\u3068\u3064\u5C4B\u6839\u306E\u4E0B\u0032",
       "2-u9tlzr9756bt3uc0v"),
  
      # (P) Maji<de>Koi<suru>5<byou><mae>
      (u"\u004D\u0061\u006A\u0069\u3067\u004B\u006F\u0069\u3059"
       u"\u308B\u0035\u79D2\u524D",
       "MajiKoi5-783gue6qz075azm5e"),
  
       # (Q) <pafii>de<runba>
      (u"\u30D1\u30D5\u30A3\u30FC\u0064\u0065\u30EB\u30F3\u30D0",
       "de-jg4avhby1noc0d"),
  
      # (R) <sono><supiido><de>
      (u"\u305D\u306E\u30B9\u30D4\u30FC\u30C9\u3067",
       "d9juau41awczczp"),
  
      # (S) -> $1.00 <-
      (u"\u002D\u003E\u0020\u0024\u0031\u002E\u0030\u0030\u0020"
       u"\u003C\u002D",
       "-> $1.00 <--")
      ]
  
  for i in punycode_testcases:
      if len(i)!=2:
          print repr(i)
  
  class PunycodeTest(unittest.TestCase):
      def test_encode(self):
          for uni, puny in punycode_testcases:
              # Need to convert both strings to lower case, since
              # some of the extended encodings use upper case, but our
              # code produces only lower case. Converting just puny to
              # lower is also insufficient, since some of the input characters
              # are upper case.
              self.assertEqual(uni.encode("punycode").lower(), puny.lower())
  
      def test_decode(self):
          for uni, puny in punycode_testcases:
              self.assertEqual(uni, puny.decode("punycode"))
  
  class UnicodeInternalTest(unittest.TestCase):
      def test_bug1251300(self):
          # Decoding with unicode_internal used to not correctly handle "code
          # points" above 0x10ffff on UCS-4 builds.
          if sys.maxunicode > 0xffff:
              ok = [
                  ("\x00\x10\xff\xff", u"\U0010ffff"),
                  ("\x00\x00\x01\x01", u"\U00000101"),
                  ("", u""),
              ]
              not_ok = [
                  "\x7f\xff\xff\xff",
                  "\x80\x00\x00\x00",
                  "\x81\x00\x00\x00",
                  "\x00",
                  "\x00\x00\x00\x00\x00",
              ]
              for internal, uni in ok:
                  if sys.byteorder == "little":
                      internal = "".join(reversed(internal))
                  self.assertEqual(uni, internal.decode("unicode_internal"))
              for internal in not_ok:
                  if sys.byteorder == "little":
                      internal = "".join(reversed(internal))
                  self.assertRaises(UnicodeDecodeError, internal.decode,
                      "unicode_internal")
  
      def test_decode_error_attributes(self):
          if sys.maxunicode > 0xffff:
              try:
                  "\x00\x00\x00\x00\x00\x11\x11\x00".decode("unicode_internal")
              except UnicodeDecodeError, ex:
                  self.assertEqual("unicode_internal", ex.encoding)
                  self.assertEqual("\x00\x00\x00\x00\x00\x11\x11\x00", ex.object)
                  self.assertEqual(4, ex.start)
                  self.assertEqual(8, ex.end)
              else:
                  self.fail()
  
      def test_decode_callback(self):
          if sys.maxunicode > 0xffff:
              codecs.register_error("UnicodeInternalTest", codecs.ignore_errors)
              decoder = codecs.getdecoder("unicode_internal")
              ab = u"ab".encode("unicode_internal")
              ignored = decoder("%s\x22\x22\x22\x22%s" % (ab[:4], ab[4:]),
                  "UnicodeInternalTest")
              self.assertEqual((u"ab", 12), ignored)
  
      def test_encode_length(self):
          # Issue 3739
          encoder = codecs.getencoder("unicode_internal")
          self.assertEqual(encoder(u"a")[1], 1)
          self.assertEqual(encoder(u"\xe9\u0142")[1], 2)
  
          encoder = codecs.getencoder("string-escape")
          self.assertEqual(encoder(r'\x00')[1], 4)
  
  # From http://www.gnu.org/software/libidn/draft-josefsson-idn-test-vectors.html
  nameprep_tests = [
      # 3.1 Map to nothing.
      ('foo\xc2\xad\xcd\x8f\xe1\xa0\x86\xe1\xa0\x8bbar'
       '\xe2\x80\x8b\xe2\x81\xa0baz\xef\xb8\x80\xef\xb8\x88\xef'
       '\xb8\x8f\xef\xbb\xbf',
       'foobarbaz'),
      # 3.2 Case folding ASCII U+0043 U+0041 U+0046 U+0045.
      ('CAFE',
       'cafe'),
      # 3.3 Case folding 8bit U+00DF (german sharp s).
      # The original test case is bogus; it says \xc3\xdf
      ('\xc3\x9f',
       'ss'),
      # 3.4 Case folding U+0130 (turkish capital I with dot).
      ('\xc4\xb0',
       'i\xcc\x87'),
      # 3.5 Case folding multibyte U+0143 U+037A.
      ('\xc5\x83\xcd\xba',
       '\xc5\x84 \xce\xb9'),
      # 3.6 Case folding U+2121 U+33C6 U+1D7BB.
      # XXX: skip this as it fails in UCS-2 mode
      #('\xe2\x84\xa1\xe3\x8f\x86\xf0\x9d\x9e\xbb',
      # 'telc\xe2\x88\x95kg\xcf\x83'),
      (None, None),
      # 3.7 Normalization of U+006a U+030c U+00A0 U+00AA.
      ('j\xcc\x8c\xc2\xa0\xc2\xaa',
       '\xc7\xb0 a'),
      # 3.8 Case folding U+1FB7 and normalization.
      ('\xe1\xbe\xb7',
       '\xe1\xbe\xb6\xce\xb9'),
      # 3.9 Self-reverting case folding U+01F0 and normalization.
      # The original test case is bogus, it says `\xc7\xf0'
      ('\xc7\xb0',
       '\xc7\xb0'),
      # 3.10 Self-reverting case folding U+0390 and normalization.
      ('\xce\x90',
       '\xce\x90'),
      # 3.11 Self-reverting case folding U+03B0 and normalization.
      ('\xce\xb0',
       '\xce\xb0'),
      # 3.12 Self-reverting case folding U+1E96 and normalization.
      ('\xe1\xba\x96',
       '\xe1\xba\x96'),
      # 3.13 Self-reverting case folding U+1F56 and normalization.
      ('\xe1\xbd\x96',
       '\xe1\xbd\x96'),
      # 3.14 ASCII space character U+0020.
      (' ',
       ' '),
      # 3.15 Non-ASCII 8bit space character U+00A0.
      ('\xc2\xa0',
       ' '),
      # 3.16 Non-ASCII multibyte space character U+1680.
      ('\xe1\x9a\x80',
       None),
      # 3.17 Non-ASCII multibyte space character U+2000.
      ('\xe2\x80\x80',
       ' '),
      # 3.18 Zero Width Space U+200b.
      ('\xe2\x80\x8b',
       ''),
      # 3.19 Non-ASCII multibyte space character U+3000.
      ('\xe3\x80\x80',
       ' '),
      # 3.20 ASCII control characters U+0010 U+007F.
      ('\x10\x7f',
       '\x10\x7f'),
      # 3.21 Non-ASCII 8bit control character U+0085.
      ('\xc2\x85',
       None),
      # 3.22 Non-ASCII multibyte control character U+180E.
      ('\xe1\xa0\x8e',
       None),
      # 3.23 Zero Width No-Break Space U+FEFF.
      ('\xef\xbb\xbf',
       ''),
      # 3.24 Non-ASCII control character U+1D175.
      ('\xf0\x9d\x85\xb5',
       None),
      # 3.25 Plane 0 private use character U+F123.
      ('\xef\x84\xa3',
       None),
      # 3.26 Plane 15 private use character U+F1234.
      ('\xf3\xb1\x88\xb4',
       None),
      # 3.27 Plane 16 private use character U+10F234.
      ('\xf4\x8f\x88\xb4',
       None),
      # 3.28 Non-character code point U+8FFFE.
      ('\xf2\x8f\xbf\xbe',
       None),
      # 3.29 Non-character code point U+10FFFF.
      ('\xf4\x8f\xbf\xbf',
       None),
      # 3.30 Surrogate code U+DF42.
      ('\xed\xbd\x82',
       None),
      # 3.31 Non-plain text character U+FFFD.
      ('\xef\xbf\xbd',
       None),
      # 3.32 Ideographic description character U+2FF5.
      ('\xe2\xbf\xb5',
       None),
      # 3.33 Display property character U+0341.
      ('\xcd\x81',
       '\xcc\x81'),
      # 3.34 Left-to-right mark U+200E.
      ('\xe2\x80\x8e',
       None),
      # 3.35 Deprecated U+202A.
      ('\xe2\x80\xaa',
       None),
      # 3.36 Language tagging character U+E0001.
      ('\xf3\xa0\x80\x81',
       None),
      # 3.37 Language tagging character U+E0042.
      ('\xf3\xa0\x81\x82',
       None),
      # 3.38 Bidi: RandALCat character U+05BE and LCat characters.
      ('foo\xd6\xbebar',
       None),
      # 3.39 Bidi: RandALCat character U+FD50 and LCat characters.
      ('foo\xef\xb5\x90bar',
       None),
      # 3.40 Bidi: RandALCat character U+FB38 and LCat characters.
      ('foo\xef\xb9\xb6bar',
       'foo \xd9\x8ebar'),
      # 3.41 Bidi: RandALCat without trailing RandALCat U+0627 U+0031.
      ('\xd8\xa71',
       None),
      # 3.42 Bidi: RandALCat character U+0627 U+0031 U+0628.
      ('\xd8\xa71\xd8\xa8',
       '\xd8\xa71\xd8\xa8'),
      # 3.43 Unassigned code point U+E0002.
      # Skip this test as we allow unassigned
      #('\xf3\xa0\x80\x82',
      # None),
      (None, None),
      # 3.44 Larger test (shrinking).
      # Original test case reads \xc3\xdf
      ('X\xc2\xad\xc3\x9f\xc4\xb0\xe2\x84\xa1j\xcc\x8c\xc2\xa0\xc2'
       '\xaa\xce\xb0\xe2\x80\x80',
       'xssi\xcc\x87tel\xc7\xb0 a\xce\xb0 '),
      # 3.45 Larger test (expanding).
      # Original test case reads \xc3\x9f
      ('X\xc3\x9f\xe3\x8c\x96\xc4\xb0\xe2\x84\xa1\xe2\x92\x9f\xe3\x8c'
       '\x80',
       'xss\xe3\x82\xad\xe3\x83\xad\xe3\x83\xa1\xe3\x83\xbc\xe3'
       '\x83\x88\xe3\x83\xabi\xcc\x87tel\x28d\x29\xe3\x82'
       '\xa2\xe3\x83\x91\xe3\x83\xbc\xe3\x83\x88')
      ]
  
  
  class NameprepTest(unittest.TestCase):
      def test_nameprep(self):
          from encodings.idna import nameprep
          for pos, (orig, prepped) in enumerate(nameprep_tests):
              if orig is None:
                  # Skipped
                  continue
              # The Unicode strings are given in UTF-8
              orig = unicode(orig, "utf-8")
              if prepped is None:
                  # Input contains prohibited characters
                  self.assertRaises(UnicodeError, nameprep, orig)
              else:
                  prepped = unicode(prepped, "utf-8")
                  try:
                      self.assertEqual(nameprep(orig), prepped)
                  except Exception,e:
                      raise test_support.TestFailed("Test 3.%d: %s" % (pos+1, str(e)))
  
  class IDNACodecTest(unittest.TestCase):
      def test_builtin_decode(self):
          self.assertEqual(unicode("python.org", "idna"), u"python.org")
          self.assertEqual(unicode("python.org.", "idna"), u"python.org.")
          self.assertEqual(unicode("xn--pythn-mua.org", "idna"), u"pyth\xf6n.org")
          self.assertEqual(unicode("xn--pythn-mua.org.", "idna"), u"pyth\xf6n.org.")
  
      def test_builtin_encode(self):
          self.assertEqual(u"python.org".encode("idna"), "python.org")
          self.assertEqual("python.org.".encode("idna"), "python.org.")
          self.assertEqual(u"pyth\xf6n.org".encode("idna"), "xn--pythn-mua.org")
          self.assertEqual(u"pyth\xf6n.org.".encode("idna"), "xn--pythn-mua.org.")
  
      def test_stream(self):
          import StringIO
          r = codecs.getreader("idna")(StringIO.StringIO("abc"))
          r.read(3)
          self.assertEqual(r.read(), u"")
  
      def test_incremental_decode(self):
          self.assertEqual(
              "".join(codecs.iterdecode("python.org", "idna")),
              u"python.org"
          )
          self.assertEqual(
              "".join(codecs.iterdecode("python.org.", "idna")),
              u"python.org."
          )
          self.assertEqual(
              "".join(codecs.iterdecode("xn--pythn-mua.org.", "idna")),
              u"pyth\xf6n.org."
          )
          self.assertEqual(
              "".join(codecs.iterdecode("xn--pythn-mua.org.", "idna")),
              u"pyth\xf6n.org."
          )
  
          decoder = codecs.getincrementaldecoder("idna")()
          self.assertEqual(decoder.decode("xn--xam", ), u"")
          self.assertEqual(decoder.decode("ple-9ta.o", ), u"\xe4xample.")
          self.assertEqual(decoder.decode(u"rg"), u"")
          self.assertEqual(decoder.decode(u"", True), u"org")
  
          decoder.reset()
          self.assertEqual(decoder.decode("xn--xam", ), u"")
          self.assertEqual(decoder.decode("ple-9ta.o", ), u"\xe4xample.")
          self.assertEqual(decoder.decode("rg."), u"org.")
          self.assertEqual(decoder.decode("", True), u"")
  
      def test_incremental_encode(self):
          self.assertEqual(
              "".join(codecs.iterencode(u"python.org", "idna")),
              "python.org"
          )
          self.assertEqual(
              "".join(codecs.iterencode(u"python.org.", "idna")),
              "python.org."
          )
          self.assertEqual(
              "".join(codecs.iterencode(u"pyth\xf6n.org.", "idna")),
              "xn--pythn-mua.org."
          )
          self.assertEqual(
              "".join(codecs.iterencode(u"pyth\xf6n.org.", "idna")),
              "xn--pythn-mua.org."
          )
  
          encoder = codecs.getincrementalencoder("idna")()
          self.assertEqual(encoder.encode(u"\xe4x"), "")
          self.assertEqual(encoder.encode(u"ample.org"), "xn--xample-9ta.")
          self.assertEqual(encoder.encode(u"", True), "org")
  
          encoder.reset()
          self.assertEqual(encoder.encode(u"\xe4x"), "")
          self.assertEqual(encoder.encode(u"ample.org."), "xn--xample-9ta.org.")
          self.assertEqual(encoder.encode(u"", True), "")
  
  class CodecsModuleTest(unittest.TestCase):
  
      def test_decode(self):
          self.assertEqual(codecs.decode('\xe4\xf6\xfc', 'latin-1'),
                            u'\xe4\xf6\xfc')
          self.assertRaises(TypeError, codecs.decode)
          self.assertEqual(codecs.decode('abc'), u'abc')
          self.assertRaises(UnicodeDecodeError, codecs.decode, '\xff', 'ascii')
  
      def test_encode(self):
          self.assertEqual(codecs.encode(u'\xe4\xf6\xfc', 'latin-1'),
                            '\xe4\xf6\xfc')
          self.assertRaises(TypeError, codecs.encode)
          self.assertRaises(LookupError, codecs.encode, "foo", "__spam__")
          self.assertEqual(codecs.encode(u'abc'), 'abc')
          self.assertRaises(UnicodeEncodeError, codecs.encode, u'\xffff', 'ascii')
  
      def test_register(self):
          self.assertRaises(TypeError, codecs.register)
          self.assertRaises(TypeError, codecs.register, 42)
  
      def test_lookup(self):
          self.assertRaises(TypeError, codecs.lookup)
          self.assertRaises(LookupError, codecs.lookup, "__spam__")
          self.assertRaises(LookupError, codecs.lookup, " ")
  
      def test_getencoder(self):
          self.assertRaises(TypeError, codecs.getencoder)
          self.assertRaises(LookupError, codecs.getencoder, "__spam__")
  
      def test_getdecoder(self):
          self.assertRaises(TypeError, codecs.getdecoder)
          self.assertRaises(LookupError, codecs.getdecoder, "__spam__")
  
      def test_getreader(self):
          self.assertRaises(TypeError, codecs.getreader)
          self.assertRaises(LookupError, codecs.getreader, "__spam__")
  
      def test_getwriter(self):
          self.assertRaises(TypeError, codecs.getwriter)
          self.assertRaises(LookupError, codecs.getwriter, "__spam__")
  
      def test_lookup_issue1813(self):
          # Issue #1813: under Turkish locales, lookup of some codecs failed
          # because 'I' is lowercased as a dotless "i"
          oldlocale = locale.getlocale(locale.LC_CTYPE)
          self.addCleanup(locale.setlocale, locale.LC_CTYPE, oldlocale)
          try:
              locale.setlocale(locale.LC_CTYPE, 'tr_TR')
          except locale.Error:
              # Unsupported locale on this system
              self.skipTest('test needs Turkish locale')
          c = codecs.lookup('ASCII')
          self.assertEqual(c.name, 'ascii')
  
  class StreamReaderTest(unittest.TestCase):
  
      def setUp(self):
          self.reader = codecs.getreader('utf-8')
          self.stream = StringIO.StringIO('\xed\x95\x9c\n\xea\xb8\x80')
  
      def test_readlines(self):
          f = self.reader(self.stream)
          self.assertEqual(f.readlines(), [u'\ud55c\n', u'\uae00'])
  
  class EncodedFileTest(unittest.TestCase):
  
      def test_basic(self):
          f = StringIO.StringIO('\xed\x95\x9c\n\xea\xb8\x80')
          ef = codecs.EncodedFile(f, 'utf-16-le', 'utf-8')
          self.assertEqual(ef.read(), '\\\xd5\n\x00\x00\xae')
  
          f = StringIO.StringIO()
          ef = codecs.EncodedFile(f, 'utf-8', 'latin1')
          ef.write('\xc3\xbc')
          self.assertEqual(f.getvalue(), '\xfc')
  
  class Str2StrTest(unittest.TestCase):
  
      def test_read(self):
          sin = "\x80".encode("base64_codec")
          reader = codecs.getreader("base64_codec")(StringIO.StringIO(sin))
          sout = reader.read()
          self.assertEqual(sout, "\x80")
          self.assertIsInstance(sout, str)
  
      def test_readline(self):
          sin = "\x80".encode("base64_codec")
          reader = codecs.getreader("base64_codec")(StringIO.StringIO(sin))
          sout = reader.readline()
          self.assertEqual(sout, "\x80")
          self.assertIsInstance(sout, str)
  
  all_unicode_encodings = [
      "ascii",
      "base64_codec",
      "big5",
      "big5hkscs",
      "charmap",
      "cp037",
      "cp1006",
      "cp1026",
      "cp1140",
      "cp1250",
      "cp1251",
      "cp1252",
      "cp1253",
      "cp1254",
      "cp1255",
      "cp1256",
      "cp1257",
      "cp1258",
      "cp424",
      "cp437",
      "cp500",
      "cp720",
      "cp737",
      "cp775",
      "cp850",
      "cp852",
      "cp855",
      "cp856",
      "cp857",
      "cp858",
      "cp860",
      "cp861",
      "cp862",
      "cp863",
      "cp864",
      "cp865",
      "cp866",
      "cp869",
      "cp874",
      "cp875",
      "cp932",
      "cp949",
      "cp950",
      "euc_jis_2004",
      "euc_jisx0213",
      "euc_jp",
      "euc_kr",
      "gb18030",
      "gb2312",
      "gbk",
      "hex_codec",
      "hp_roman8",
      "hz",
      "idna",
      "iso2022_jp",
      "iso2022_jp_1",
      "iso2022_jp_2",
      "iso2022_jp_2004",
      "iso2022_jp_3",
      "iso2022_jp_ext",
      "iso2022_kr",
      "iso8859_1",
      "iso8859_10",
      "iso8859_11",
      "iso8859_13",
      "iso8859_14",
      "iso8859_15",
      "iso8859_16",
      "iso8859_2",
      "iso8859_3",
      "iso8859_4",
      "iso8859_5",
      "iso8859_6",
      "iso8859_7",
      "iso8859_8",
      "iso8859_9",
      "johab",
      "koi8_r",
      "koi8_u",
      "latin_1",
      "mac_cyrillic",
      "mac_greek",
      "mac_iceland",
      "mac_latin2",
      "mac_roman",
      "mac_turkish",
      "palmos",
      "ptcp154",
      "punycode",
      "raw_unicode_escape",
      "rot_13",
      "shift_jis",
      "shift_jis_2004",
      "shift_jisx0213",
      "tis_620",
      "unicode_escape",
      "unicode_internal",
      "utf_16",
      "utf_16_be",
      "utf_16_le",
      "utf_7",
      "utf_8",
  ]
  
  if hasattr(codecs, "mbcs_encode"):
      all_unicode_encodings.append("mbcs")
  
  # The following encodings work only with str, not unicode
  all_string_encodings = [
      "quopri_codec",
      "string_escape",
      "uu_codec",
  ]
  
  # The following encoding is not tested, because it's not supposed
  # to work:
  #    "undefined"
  
  # The following encodings don't work in stateful mode
  broken_unicode_with_streams = [
      "base64_codec",
      "hex_codec",
      "punycode",
      "unicode_internal"
  ]
  broken_incremental_coders = broken_unicode_with_streams[:]
  
  # The following encodings only support "strict" mode
  only_strict_mode = [
      "idna",
      "zlib_codec",
      "bz2_codec",
  ]
  
  try:
      import bz2
  except ImportError:
      pass
  else:
      all_unicode_encodings.append("bz2_codec")
      broken_unicode_with_streams.append("bz2_codec")
  
  try:
      import zlib
  except ImportError:
      pass
  else:
      all_unicode_encodings.append("zlib_codec")
      broken_unicode_with_streams.append("zlib_codec")
  
  class BasicUnicodeTest(unittest.TestCase):
      def test_basics(self):
          s = u"abc123" # all codecs should be able to encode these
          for encoding in all_unicode_encodings:
              name = codecs.lookup(encoding).name
              if encoding.endswith("_codec"):
                  name += "_codec"
              elif encoding == "latin_1":
                  name = "latin_1"
              self.assertEqual(encoding.replace("_", "-"), name.replace("_", "-"))
              (bytes, size) = codecs.getencoder(encoding)(s)
              self.assertEqual(size, len(s), "%r != %r (encoding=%r)" % (size, len(s), encoding))
              (chars, size) = codecs.getdecoder(encoding)(bytes)
              self.assertEqual(chars, s, "%r != %r (encoding=%r)" % (chars, s, encoding))
  
              if encoding not in broken_unicode_with_streams:
                  # check stream reader/writer
                  q = Queue()
                  writer = codecs.getwriter(encoding)(q)
                  encodedresult = ""
                  for c in s:
                      writer.write(c)
                      encodedresult += q.read()
                  q = Queue()
                  reader = codecs.getreader(encoding)(q)
                  decodedresult = u""
                  for c in encodedresult:
                      q.write(c)
                      decodedresult += reader.read()
                  self.assertEqual(decodedresult, s, "%r != %r (encoding=%r)" % (decodedresult, s, encoding))
  
              if encoding not in broken_incremental_coders:
                  # check incremental decoder/encoder (fetched via the Python
                  # and C API) and iterencode()/iterdecode()
                  try:
                      encoder = codecs.getincrementalencoder(encoding)()
                      cencoder = _testcapi.codec_incrementalencoder(encoding)
                  except LookupError: # no IncrementalEncoder
                      pass
                  else:
                      # check incremental decoder/encoder
                      encodedresult = ""
                      for c in s:
                          encodedresult += encoder.encode(c)
                      encodedresult += encoder.encode(u"", True)
                      decoder = codecs.getincrementaldecoder(encoding)()
                      decodedresult = u""
                      for c in encodedresult:
                          decodedresult += decoder.decode(c)
                      decodedresult += decoder.decode("", True)
                      self.assertEqual(decodedresult, s, "%r != %r (encoding=%r)" % (decodedresult, s, encoding))
  
                      # check C API
                      encodedresult = ""
                      for c in s:
                          encodedresult += cencoder.encode(c)
                      encodedresult += cencoder.encode(u"", True)
                      cdecoder = _testcapi.codec_incrementaldecoder(encoding)
                      decodedresult = u""
                      for c in encodedresult:
                          decodedresult += cdecoder.decode(c)
                      decodedresult += cdecoder.decode("", True)
                      self.assertEqual(decodedresult, s, "%r != %r (encoding=%r)" % (decodedresult, s, encoding))
  
                      # check iterencode()/iterdecode()
                      result = u"".join(codecs.iterdecode(codecs.iterencode(s, encoding), encoding))
                      self.assertEqual(result, s, "%r != %r (encoding=%r)" % (result, s, encoding))
  
                      # check iterencode()/iterdecode() with empty string
                      result = u"".join(codecs.iterdecode(codecs.iterencode(u"", encoding), encoding))
                      self.assertEqual(result, u"")
  
                  if encoding not in only_strict_mode:
                      # check incremental decoder/encoder with errors argument
                      try:
                          encoder = codecs.getincrementalencoder(encoding)("ignore")
                          cencoder = _testcapi.codec_incrementalencoder(encoding, "ignore")
                      except LookupError: # no IncrementalEncoder
                          pass
                      else:
                          encodedresult = "".join(encoder.encode(c) for c in s)
                          decoder = codecs.getincrementaldecoder(encoding)("ignore")
                          decodedresult = u"".join(decoder.decode(c) for c in encodedresult)
                          self.assertEqual(decodedresult, s, "%r != %r (encoding=%r)" % (decodedresult, s, encoding))
  
                          encodedresult = "".join(cencoder.encode(c) for c in s)
                          cdecoder = _testcapi.codec_incrementaldecoder(encoding, "ignore")
                          decodedresult = u"".join(cdecoder.decode(c) for c in encodedresult)
                          self.assertEqual(decodedresult, s, "%r != %r (encoding=%r)" % (decodedresult, s, encoding))
  
      def test_seek(self):
          # all codecs should be able to encode these
          s = u"%s\n%s\n" % (100*u"abc123", 100*u"def456")
          for encoding in all_unicode_encodings:
              if encoding == "idna": # FIXME: See SF bug #1163178
                  continue
              if encoding in broken_unicode_with_streams:
                  continue
              reader = codecs.getreader(encoding)(StringIO.StringIO(s.encode(encoding)))
              for t in xrange(5):
                  # Test that calling seek resets the internal codec state and buffers
                  reader.seek(0, 0)
                  line = reader.readline()
                  self.assertEqual(s[:len(line)], line)
  
      def test_bad_decode_args(self):
          for encoding in all_unicode_encodings:
              decoder = codecs.getdecoder(encoding)
              self.assertRaises(TypeError, decoder)
              if encoding not in ("idna", "punycode"):
                  self.assertRaises(TypeError, decoder, 42)
  
      def test_bad_encode_args(self):
          for encoding in all_unicode_encodings:
              encoder = codecs.getencoder(encoding)
              self.assertRaises(TypeError, encoder)
  
      def test_encoding_map_type_initialized(self):
          from encodings import cp1140
          # This used to crash, we are only verifying there's no crash.
          table_type = type(cp1140.encoding_table)
          self.assertEqual(table_type, table_type)
  
  class BasicStrTest(unittest.TestCase):
      def test_basics(self):
          s = "abc123"
          for encoding in all_string_encodings:
              (bytes, size) = codecs.getencoder(encoding)(s)
              self.assertEqual(size, len(s))
              (chars, size) = codecs.getdecoder(encoding)(bytes)
              self.assertEqual(chars, s, "%r != %r (encoding=%r)" % (chars, s, encoding))
  
  class CharmapTest(unittest.TestCase):
      def test_decode_with_string_map(self):
          self.assertEqual(
              codecs.charmap_decode("\x00\x01\x02", "strict", u"abc"),
              (u"abc", 3)
          )
  
          self.assertEqual(
              codecs.charmap_decode("\x00\x01\x02", "replace", u"ab"),
              (u"ab\ufffd", 3)
          )
  
          self.assertEqual(
              codecs.charmap_decode("\x00\x01\x02", "replace", u"ab\ufffe"),
              (u"ab\ufffd", 3)
          )
  
          self.assertEqual(
              codecs.charmap_decode("\x00\x01\x02", "ignore", u"ab"),
              (u"ab", 3)
          )
  
          self.assertEqual(
              codecs.charmap_decode("\x00\x01\x02", "ignore", u"ab\ufffe"),
              (u"ab", 3)
          )
  
          allbytes = "".join(chr(i) for i in xrange(256))
          self.assertEqual(
              codecs.charmap_decode(allbytes, "ignore", u""),
              (u"", len(allbytes))
          )
  
  class WithStmtTest(unittest.TestCase):
      def test_encodedfile(self):
          f = StringIO.StringIO("\xc3\xbc")
          with codecs.EncodedFile(f, "latin-1", "utf-8") as ef:
              self.assertEqual(ef.read(), "\xfc")
  
      def test_streamreaderwriter(self):
          f = StringIO.StringIO("\xc3\xbc")
          info = codecs.lookup("utf-8")
          with codecs.StreamReaderWriter(f, info.streamreader,
                                         info.streamwriter, 'strict') as srw:
              self.assertEqual(srw.read(), u"\xfc")
  
  
  class BomTest(unittest.TestCase):
      def test_seek0(self):
          data = u"1234567890"
          tests = ("utf-16",
                   "utf-16-le",
                   "utf-16-be",
                   "utf-32",
                   "utf-32-le",
                   "utf-32-be")
          self.addCleanup(test_support.unlink, test_support.TESTFN)
          for encoding in tests:
              # Check if the BOM is written only once
              with codecs.open(test_support.TESTFN, 'w+', encoding=encoding) as f:
                  f.write(data)
                  f.write(data)
                  f.seek(0)
                  self.assertEqual(f.read(), data * 2)
                  f.seek(0)
                  self.assertEqual(f.read(), data * 2)
  
              # Check that the BOM is written after a seek(0)
              with codecs.open(test_support.TESTFN, 'w+', encoding=encoding) as f:
                  f.write(data[0])
                  self.assertNotEqual(f.tell(), 0)
                  f.seek(0)
                  f.write(data)
                  f.seek(0)
                  self.assertEqual(f.read(), data)
  
              # (StreamWriter) Check that the BOM is written after a seek(0)
              with codecs.open(test_support.TESTFN, 'w+', encoding=encoding) as f:
                  f.writer.write(data[0])
                  self.assertNotEqual(f.writer.tell(), 0)
                  f.writer.seek(0)
                  f.writer.write(data)
                  f.seek(0)
                  self.assertEqual(f.read(), data)
  
              # Check that the BOM is not written after a seek() at a position
              # different than the start
              with codecs.open(test_support.TESTFN, 'w+', encoding=encoding) as f:
                  f.write(data)
                  f.seek(f.tell())
                  f.write(data)
                  f.seek(0)
                  self.assertEqual(f.read(), data * 2)
  
              # (StreamWriter) Check that the BOM is not written after a seek()
              # at a position different than the start
              with codecs.open(test_support.TESTFN, 'w+', encoding=encoding) as f:
                  f.writer.write(data)
                  f.writer.seek(f.writer.tell())
                  f.writer.write(data)
                  f.seek(0)
                  self.assertEqual(f.read(), data * 2)
  
  
  def test_main():
      test_support.run_unittest(
          UTF32Test,
          UTF32LETest,
          UTF32BETest,
          UTF16Test,
          UTF16LETest,
          UTF16BETest,
          UTF8Test,
          UTF8SigTest,
          UTF7Test,
          UTF16ExTest,
          ReadBufferTest,
          CharBufferTest,
          EscapeDecodeTest,
          RecodingTest,
          PunycodeTest,
          UnicodeInternalTest,
          NameprepTest,
          IDNACodecTest,
          CodecsModuleTest,
          StreamReaderTest,
          EncodedFileTest,
          Str2StrTest,
          BasicUnicodeTest,
          BasicStrTest,
          CharmapTest,
          WithStmtTest,
          BomTest,
      )
  
  
  if __name__ == "__main__":
      test_main()
  