#
# multibytecodec_support.py
# Common Unittest Routines for CJK codecs
#
import codecs
import os
import re
import sys
import unittest
from http.client import HTTPException
from test import support
from io import BytesIO
class TestBase:
encoding = '' # codec name
codec = None # codec tuple (with 4 elements)
tstring = None # must set. 2 strings to test StreamReader
codectests = None # must set. codec test tuple
roundtriptest = 1 # set if roundtrip is possible with unicode
has_iso10646 = 0 # set if this encoding contains whole iso10646 map
xmlcharnametest = None # string to test xmlcharrefreplace
unmappedunicode = '\udeee' # a unicode code point that is not mapped.
def setUp(self):
if self.codec is None:
self.codec = codecs.lookup(self.encoding)
self.encode = self.codec.encode
self.decode = self.codec.decode
self.reader = self.codec.streamreader
self.writer = self.codec.streamwriter
self.incrementalencoder = self.codec.incrementalencoder
self.incrementaldecoder = self.codec.incrementaldecoder
def test_chunkcoding(self):
tstring_lines = []
for b in self.tstring:
lines = b.split(b"\n")
last = lines.pop()
assert last == b""
lines = [line + b"\n" for line in lines]
tstring_lines.append(lines)
for native, utf8 in zip(*tstring_lines):
u = self.decode(native)[0]
self.assertEqual(u, utf8.decode('utf-8'))
if self.roundtriptest:
self.assertEqual(native, self.encode(u)[0])
def test_errorhandle(self):
for source, scheme, expected in self.codectests:
if isinstance(source, bytes):
func = self.decode
else:
func = self.encode
if expected:
result = func(source, scheme)[0]
if func is self.decode:
self.assertTrue(type(result) is str, type(result))
self.assertEqual(result, expected,
'%a.decode(%r, %r)=%a != %a'
% (source, self.encoding, scheme, result,
expected))
else:
self.assertTrue(type(result) is bytes, type(result))
self.assertEqual(result, expected,
'%a.encode(%r, %r)=%a != %a'
% (source, self.encoding, scheme, result,
expected))
else:
self.assertRaises(UnicodeError, func, source, scheme)
def test_xmlcharrefreplace(self):
if self.has_iso10646:
self.skipTest('encoding contains full ISO 10646 map')
s = "\u0b13\u0b23\u0b60 nd eggs"
self.assertEqual(
self.encode(s, "xmlcharrefreplace")[0],
b"ଓଣୠ nd eggs"
)
def test_customreplace_encode(self):
if self.has_iso10646:
self.skipTest('encoding contains full ISO 10646 map')
from html.entities import codepoint2name
def xmlcharnamereplace(exc):
if not isinstance(exc, UnicodeEncodeError):
raise TypeError("don't know how to handle %r" % exc)
l = []
for c in exc.object[exc.start:exc.end]:
if ord(c) in codepoint2name:
l.append("&%s;" % codepoint2name[ord(c)])
else:
l.append("&#%d;" % ord(c))
return ("".join(l), exc.end)
codecs.register_error("test.xmlcharnamereplace", xmlcharnamereplace)
if self.xmlcharnametest:
sin, sout = self.xmlcharnametest
else:
sin = "\xab\u211c\xbb = \u2329\u1234\u232a"
sout = b"«ℜ» = ⟨ሴ⟩"
self.assertEqual(self.encode(sin,
"test.xmlcharnamereplace")[0], sout)
def test_callback_returns_bytes(self):
def myreplace(exc):
return (b"1234", exc.end)
codecs.register_error("test.cjktest", myreplace)
enc = self.encode("abc" + self.unmappedunicode + "def", "test.cjktest")[0]
self.assertEqual(enc, b"abc1234def")
def test_callback_wrong_objects(self):
def myreplace(exc):
return (ret, exc.end)
codecs.register_error("test.cjktest", myreplace)
for ret in ([1, 2, 3], [], None, object()):
self.assertRaises(TypeError, self.encode, self.unmappedunicode,
'test.cjktest')
def test_callback_long_index(self):
def myreplace(exc):
return ('x', int(exc.end))
codecs.register_error("test.cjktest", myreplace)
self.assertEqual(self.encode('abcd' + self.unmappedunicode + 'efgh',
'test.cjktest'), (b'abcdxefgh', 9))
def myreplace(exc):
return ('x', sys.maxsize + 1)
codecs.register_error("test.cjktest", myreplace)
self.assertRaises(IndexError, self.encode, self.unmappedunicode,
'test.cjktest')
def test_callback_None_index(self):
def myreplace(exc):
return ('x', None)
codecs.register_error("test.cjktest", myreplace)
self.assertRaises(TypeError, self.encode, self.unmappedunicode,
'test.cjktest')
def test_callback_backward_index(self):
def myreplace(exc):
if myreplace.limit > 0:
myreplace.limit -= 1
return ('REPLACED', 0)
else:
return ('TERMINAL', exc.end)
myreplace.limit = 3
codecs.register_error("test.cjktest", myreplace)
self.assertEqual(self.encode('abcd' + self.unmappedunicode + 'efgh',
'test.cjktest'),
(b'abcdREPLACEDabcdREPLACEDabcdREPLACEDabcdTERMINALefgh', 9))
def test_callback_forward_index(self):
def myreplace(exc):
return ('REPLACED', exc.end + 2)
codecs.register_error("test.cjktest", myreplace)
self.assertEqual(self.encode('abcd' + self.unmappedunicode + 'efgh',
'test.cjktest'), (b'abcdREPLACEDgh', 9))
def test_callback_index_outofbound(self):
def myreplace(exc):
return ('TERM', 100)
codecs.register_error("test.cjktest", myreplace)
self.assertRaises(IndexError, self.encode, self.unmappedunicode,
'test.cjktest')
def test_incrementalencoder(self):
UTF8Reader = codecs.getreader('utf-8')
for sizehint in [None] + list(range(1, 33)) + \
[64, 128, 256, 512, 1024]:
istream = UTF8Reader(BytesIO(self.tstring[1]))
ostream = BytesIO()
encoder = self.incrementalencoder()
while 1:
if sizehint is not None:
data = istream.read(sizehint)
else:
data = istream.read()
if not data:
break
e = encoder.encode(data)
ostream.write(e)
self.assertEqual(ostream.getvalue(), self.tstring[0])
def test_incrementaldecoder(self):
UTF8Writer = codecs.getwriter('utf-8')
for sizehint in [None, -1] + list(range(1, 33)) + \
[64, 128, 256, 512, 1024]:
istream = BytesIO(self.tstring[0])
ostream = UTF8Writer(BytesIO())
decoder = self.incrementaldecoder()
while 1:
data = istream.read(sizehint)
if not data:
break
else:
u = decoder.decode(data)
ostream.write(u)
self.assertEqual(ostream.getvalue(), self.tstring[1])
def test_incrementalencoder_error_callback(self):
inv = self.unmappedunicode
e = self.incrementalencoder()
self.assertRaises(UnicodeEncodeError, e.encode, inv, True)
e.errors = 'ignore'
self.assertEqual(e.encode(inv, True), b'')
e.reset()
def tempreplace(exc):
return ('called', exc.end)
codecs.register_error('test.incremental_error_callback', tempreplace)
e.errors = 'test.incremental_error_callback'
self.assertEqual(e.encode(inv, True), b'called')
# again
e.errors = 'ignore'
self.assertEqual(e.encode(inv, True), b'')
def test_streamreader(self):
UTF8Writer = codecs.getwriter('utf-8')
for name in ["read", "readline", "readlines"]:
for sizehint in [None, -1] + list(range(1, 33)) + \
[64, 128, 256, 512, 1024]:
istream = self.reader(BytesIO(self.tstring[0]))
ostream = UTF8Writer(BytesIO())
func = getattr(istream, name)
while 1:
data = func(sizehint)
if not data:
break
if name == "readlines":
ostream.writelines(data)
else:
ostream.write(data)
self.assertEqual(ostream.getvalue(), self.tstring[1])
def test_streamwriter(self):
readfuncs = ('read', 'readline', 'readlines')
UTF8Reader = codecs.getreader('utf-8')
for name in readfuncs:
for sizehint in [None] + list(range(1, 33)) + \
[64, 128, 256, 512, 1024]:
istream = UTF8Reader(BytesIO(self.tstring[1]))
ostream = self.writer(BytesIO())
func = getattr(istream, name)
while 1:
if sizehint is not None:
data = func(sizehint)
else:
data = func()
if not data:
break
if name == "readlines":
ostream.writelines(data)
else:
ostream.write(data)
self.assertEqual(ostream.getvalue(), self.tstring[0])
def test_streamwriter_reset_no_pending(self):
# Issue #23247: Calling reset() on a fresh StreamWriter instance
# (without pending data) must not crash
stream = BytesIO()
writer = self.writer(stream)
writer.reset()
def test_incrementalencoder_del_segfault(self):
e = self.incrementalencoder()
with self.assertRaises(AttributeError):
del e.errors
class TestBase_Mapping(unittest.TestCase):
pass_enctest = []
pass_dectest = []
supmaps = []
codectests = []
def setUp(self):
try:
self.open_mapping_file().close() # test it to report the error early
except (OSError, HTTPException):
self.skipTest("Could not retrieve "+self.mapfileurl)
def open_mapping_file(self):
return support.open_urlresource(self.mapfileurl, encoding="utf-8")
def test_mapping_file(self):
if self.mapfileurl.endswith('.xml'):
self._test_mapping_file_ucm()
else:
self._test_mapping_file_plain()
def _test_mapping_file_plain(self):
def unichrs(s):
return ''.join(chr(int(x, 16)) for x in s.split('+'))
urt_wa = {}
with self.open_mapping_file() as f:
for line in f:
if not line:
break
data = line.split('#')[0].split()
if len(data) != 2:
continue
if data[0][:2] != '0x':
self.fail(f"Invalid line: {line!r}")
csetch = bytes.fromhex(data[0][2:])
if len(csetch) == 1 and 0x80 <= csetch[0]:
continue
unich = unichrs(data[1])
if ord(unich) == 0xfffd or unich in urt_wa:
continue
urt_wa[unich] = csetch
self._testpoint(csetch, unich)
def _test_mapping_file_ucm(self):
with self.open_mapping_file() as f:
ucmdata = f.read()
uc = re.findall('<a u="([A-F0-9]{4})" b="([0-9A-F ]+)"/>', ucmdata)
for uni, coded in uc:
unich = chr(int(uni, 16))
codech = bytes.fromhex(coded)
self._testpoint(codech, unich)
def test_mapping_supplemental(self):
for mapping in self.supmaps:
self._testpoint(*mapping)
def _testpoint(self, csetch, unich):
if (csetch, unich) not in self.pass_enctest:
self.assertEqual(unich.encode(self.encoding), csetch)
if (csetch, unich) not in self.pass_dectest:
self.assertEqual(str(csetch, self.encoding), unich)
def test_errorhandle(self):
for source, scheme, expected in self.codectests:
if isinstance(source, bytes):
func = source.decode
else:
func = source.encode
if expected:
if isinstance(source, bytes):
result = func(self.encoding, scheme)
self.assertTrue(type(result) is str, type(result))
self.assertEqual(result, expected,
'%a.decode(%r, %r)=%a != %a'
% (source, self.encoding, scheme, result,
expected))
else:
result = func(self.encoding, scheme)
self.assertTrue(type(result) is bytes, type(result))
self.assertEqual(result, expected,
'%a.encode(%r, %r)=%a != %a'
% (source, self.encoding, scheme, result,
expected))
else:
self.assertRaises(UnicodeError, func, self.encoding, scheme)
def load_teststring(name):
dir = os.path.join(os.path.dirname(__file__), 'cjkencodings')
with open(os.path.join(dir, name + '.txt'), 'rb') as f:
encoded = f.read()
with open(os.path.join(dir, name + '-utf8.txt'), 'rb') as f:
utf8 = f.read()
return encoded, utf8
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