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Patch #1436130: codecs.lookup() now returns a CodecInfo object (a subclass

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of tuple) that provides incremental decoders and encoders (a way to use
stateful codecs without the stream API). Functions
codecs.getincrementaldecoder() and codecs.getincrementalencoder() have
been added.
This commit is contained in:
Walter Dörwald 2006-03-15 11:35:15 +00:00
parent e2ebb2d7f7
commit abb02e5994
98 changed files with 2212 additions and 420 deletions
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57
Lib/test/test_codecs.py
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@ -41,6 +41,33 @@ class ReadTest(unittest.TestCase):
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 rest 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))
@ -977,6 +1004,12 @@ 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)
if encoding != "unicode_internal":
self.assertEqual(size, len(s), "%r != %r (encoding=%r)" % (size, len(s), encoding))
@ -999,6 +1032,30 @@ class BasicUnicodeTest(unittest.TestCase):
decodedresult += reader.read()
self.assertEqual(decodedresult, s, "%r != %r (encoding=%r)" % (decodedresult, s, encoding))
# check incremental decoder/encoder and iterencode()/iterdecode()
try:
encoder = codecs.getincrementalencoder(encoding)()
except LookupError: # no IncrementalEncoder
pass
else:
# check incremental decoder/encoder
encodedresult = ""
for c in s:
encodedresult += encoder.encode(c)
decoder = codecs.getincrementaldecoder(encoding)()
decodedresult = u""
for c in encodedresult:
decodedresult += decoder.decode(c)
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"")
def test_seek(self):
# all codecs should be able to encode these
s = u"%s\n%s\n" % (100*u"abc123", 100*u"def456")