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test_multibytecodec.py
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# # test_multibytecodec.py # Unit test for multibytecodec itself # from test import support from test.support import TESTFN import unittest, io, codecs, sys import _multibytecodec ALL_CJKENCODINGS = [ # _codecs_cn 'gb2312', 'gbk', 'gb18030', 'hz', # _codecs_hk 'big5hkscs', # _codecs_jp 'cp932', 'shift_jis', 'euc_jp', 'euc_jisx0213', 'shift_jisx0213', 'euc_jis_2004', 'shift_jis_2004', # _codecs_kr 'cp949', 'euc_kr', 'johab', # _codecs_tw 'big5', 'cp950', # _codecs_iso2022 'iso2022_jp', 'iso2022_jp_1', 'iso2022_jp_2', 'iso2022_jp_2004', 'iso2022_jp_3', 'iso2022_jp_ext', 'iso2022_kr', ] class Test_MultibyteCodec(unittest.TestCase): def test_nullcoding(self): for enc in ALL_CJKENCODINGS: self.assertEqual(b''.decode(enc), '') self.assertEqual(str(b'', enc), '') self.assertEqual(''.encode(enc), b'') def test_str_decode(self): for enc in ALL_CJKENCODINGS: self.assertEqual('abcd'.encode(enc), b'abcd') def test_errorcallback_longindex(self): dec = codecs.getdecoder('euc-kr') myreplace = lambda exc: ('', sys.maxsize+1) codecs.register_error('test.cjktest', myreplace) self.assertRaises(IndexError, dec, b'apple\x92ham\x93spam', 'test.cjktest') def test_errorcallback_custom_ignore(self): # Issue #23215: MemoryError with custom error handlers and multibyte codecs data = 100 * "\udc00" codecs.register_error("test.ignore", codecs.ignore_errors) for enc in ALL_CJKENCODINGS: self.assertEqual(data.encode(enc, "test.ignore"), b'') def test_codingspec(self): try: for enc in ALL_CJKENCODINGS: code = '# coding: {}\n'.format(enc) exec(code) finally: support.unlink(TESTFN) def test_init_segfault(self): # bug #3305: this used to segfault self.assertRaises(AttributeError, _multibytecodec.MultibyteStreamReader, None) self.assertRaises(AttributeError, _multibytecodec.MultibyteStreamWriter, None) def test_decode_unicode(self): # Trying to decode a unicode string should raise a TypeError for enc in ALL_CJKENCODINGS: self.assertRaises(TypeError, codecs.getdecoder(enc), "") class Test_IncrementalEncoder(unittest.TestCase): def test_stateless(self): # cp949 encoder isn't stateful at all. encoder = codecs.getincrementalencoder('cp949')() self.assertEqual(encoder.encode('\ud30c\uc774\uc36c \ub9c8\uc744'), b'\xc6\xc4\xc0\xcc\xbd\xe3 \xb8\xb6\xc0\xbb') self.assertEqual(encoder.reset(), None) self.assertEqual(encoder.encode('\u2606\u223c\u2606', True), b'\xa1\xd9\xa1\xad\xa1\xd9') self.assertEqual(encoder.reset(), None) self.assertEqual(encoder.encode('', True), b'') self.assertEqual(encoder.encode('', False), b'') self.assertEqual(encoder.reset(), None) def test_stateful(self): # jisx0213 encoder is stateful for a few code points. eg) # U+00E6 => A9DC # U+00E6 U+0300 => ABC4 # U+0300 => ABDC encoder = codecs.getincrementalencoder('jisx0213')() self.assertEqual(encoder.encode('\u00e6\u0300'), b'\xab\xc4') self.assertEqual(encoder.encode('\u00e6'), b'') self.assertEqual(encoder.encode('\u0300'), b'\xab\xc4') self.assertEqual(encoder.encode('\u00e6', True), b'\xa9\xdc') self.assertEqual(encoder.reset(), None) self.assertEqual(encoder.encode('\u0300'), b'\xab\xdc') self.assertEqual(encoder.encode('\u00e6'), b'') self.assertEqual(encoder.encode('', True), b'\xa9\xdc') self.assertEqual(encoder.encode('', True), b'') def test_stateful_keep_buffer(self): encoder = codecs.getincrementalencoder('jisx0213')() self.assertEqual(encoder.encode('\u00e6'), b'') self.assertRaises(UnicodeEncodeError, encoder.encode, '\u0123') self.assertEqual(encoder.encode('\u0300\u00e6'), b'\xab\xc4') self.assertRaises(UnicodeEncodeError, encoder.encode, '\u0123') self.assertEqual(encoder.reset(), None) self.assertEqual(encoder.encode('\u0300'), b'\xab\xdc') self.assertEqual(encoder.encode('\u00e6'), b'') self.assertRaises(UnicodeEncodeError, encoder.encode, '\u0123') self.assertEqual(encoder.encode('', True), b'\xa9\xdc') def test_state_methods_with_buffer_state(self): # euc_jis_2004 stores state as a buffer of pending bytes encoder = codecs.getincrementalencoder('euc_jis_2004')() initial_state = encoder.getstate() self.assertEqual(encoder.encode('\u00e6\u0300'), b'\xab\xc4') encoder.setstate(initial_state) self.assertEqual(encoder.encode('\u00e6\u0300'), b'\xab\xc4') self.assertEqual(encoder.encode('\u00e6'), b'') partial_state = encoder.getstate() self.assertEqual(encoder.encode('\u0300'), b'\xab\xc4') encoder.setstate(partial_state) self.assertEqual(encoder.encode('\u0300'), b'\xab\xc4') def test_state_methods_with_non_buffer_state(self): # iso2022_jp stores state without using a buffer encoder = codecs.getincrementalencoder('iso2022_jp')() self.assertEqual(encoder.encode('z'), b'z') en_state = encoder.getstate() self.assertEqual(encoder.encode('\u3042'), b'\x1b\x24\x42\x24\x22') jp_state = encoder.getstate() self.assertEqual(encoder.encode('z'), b'\x1b\x28\x42z') encoder.setstate(jp_state) self.assertEqual(encoder.encode('\u3042'), b'\x24\x22') encoder.setstate(en_state) self.assertEqual(encoder.encode('z'), b'z') def test_getstate_returns_expected_value(self): # Note: getstate is implemented such that these state values # are expected to be the same across all builds of Python, # regardless of x32/64 bit, endianness and compiler. # euc_jis_2004 stores state as a buffer of pending bytes buffer_state_encoder = codecs.getincrementalencoder('euc_jis_2004')() self.assertEqual(buffer_state_encoder.getstate(), 0) buffer_state_encoder.encode('\u00e6') self.assertEqual(buffer_state_encoder.getstate(), int.from_bytes( b"\x02" b"\xc3\xa6" b"\x00\x00\x00\x00\x00\x00\x00\x00", 'little')) buffer_state_encoder.encode('\u0300') self.assertEqual(buffer_state_encoder.getstate(), 0) # iso2022_jp stores state without using a buffer non_buffer_state_encoder = codecs.getincrementalencoder('iso2022_jp')() self.assertEqual(non_buffer_state_encoder.getstate(), int.from_bytes( b"\x00" b"\x42\x42\x00\x00\x00\x00\x00\x00", 'little')) non_buffer_state_encoder.encode('\u3042') self.assertEqual(non_buffer_state_encoder.getstate(), int.from_bytes( b"\x00" b"\xc2\x42\x00\x00\x00\x00\x00\x00", 'little')) def test_setstate_validates_input_size(self): encoder = codecs.getincrementalencoder('euc_jp')() pending_size_nine = int.from_bytes( b"\x09" b"\x00\x00\x00\x00\x00\x00\x00\x00" b"\x00\x00\x00\x00\x00\x00\x00\x00", 'little') self.assertRaises(UnicodeError, encoder.setstate, pending_size_nine) def test_setstate_validates_input_bytes(self): encoder = codecs.getincrementalencoder('euc_jp')() invalid_utf8 = int.from_bytes( b"\x01" b"\xff" b"\x00\x00\x00\x00\x00\x00\x00\x00", 'little') self.assertRaises(UnicodeDecodeError, encoder.setstate, invalid_utf8) def test_issue5640(self): encoder = codecs.getincrementalencoder('shift-jis')('backslashreplace') self.assertEqual(encoder.encode('\xff'), b'\\xff') self.assertEqual(encoder.encode('\n'), b'\n') class Test_IncrementalDecoder(unittest.TestCase): def test_dbcs(self): # cp949 decoder is simple with only 1 or 2 bytes sequences. decoder = codecs.getincrementaldecoder('cp949')() self.assertEqual(decoder.decode(b'\xc6\xc4\xc0\xcc\xbd'), '\ud30c\uc774') self.assertEqual(decoder.decode(b'\xe3 \xb8\xb6\xc0\xbb'), '\uc36c \ub9c8\uc744') self.assertEqual(decoder.decode(b''), '') def test_dbcs_keep_buffer(self): decoder = codecs.getincrementaldecoder('cp949')() self.assertEqual(decoder.decode(b'\xc6\xc4\xc0'), '\ud30c') self.assertRaises(UnicodeDecodeError, decoder.decode, b'', True) self.assertEqual(decoder.decode(b'\xcc'), '\uc774') self.assertEqual(decoder.decode(b'\xc6\xc4\xc0'), '\ud30c') self.assertRaises(UnicodeDecodeError, decoder.decode, b'\xcc\xbd', True) self.assertEqual(decoder.decode(b'\xcc'), '\uc774') def test_iso2022(self): decoder = codecs.getincrementaldecoder('iso2022-jp')() ESC = b'\x1b' self.assertEqual(decoder.decode(ESC + b'('), '') self.assertEqual(decoder.decode(b'B', True), '') self.assertEqual(decoder.decode(ESC + b'$'), '') self.assertEqual(decoder.decode(b'B@$'), '\u4e16') self.assertEqual(decoder.decode(b'@$@'), '\u4e16') self.assertEqual(decoder.decode(b'$', True), '\u4e16') self.assertEqual(decoder.reset(), None) self.assertEqual(decoder.decode(b'@$'), '@$') self.assertEqual(decoder.decode(ESC + b'$'), '') self.assertRaises(UnicodeDecodeError, decoder.decode, b'', True) self.assertEqual(decoder.decode(b'B@$'), '\u4e16') def test_decode_unicode(self): # Trying to decode a unicode string should raise a TypeError for enc in ALL_CJKENCODINGS: decoder = codecs.getincrementaldecoder(enc)() self.assertRaises(TypeError, decoder.decode, "") def test_state_methods(self): decoder = codecs.getincrementaldecoder('euc_jp')() # Decode a complete input sequence self.assertEqual(decoder.decode(b'\xa4\xa6'), '\u3046') pending1, _ = decoder.getstate() self.assertEqual(pending1, b'') # Decode first half of a partial input sequence self.assertEqual(decoder.decode(b'\xa4'), '') pending2, flags2 = decoder.getstate() self.assertEqual(pending2, b'\xa4') # Decode second half of a partial input sequence self.assertEqual(decoder.decode(b'\xa6'), '\u3046') pending3, _ = decoder.getstate() self.assertEqual(pending3, b'') # Jump back and decode second half of partial input sequence again decoder.setstate((pending2, flags2)) self.assertEqual(decoder.decode(b'\xa6'), '\u3046') pending4, _ = decoder.getstate() self.assertEqual(pending4, b'') # Ensure state values are preserved correctly decoder.setstate((b'abc', 123456789)) self.assertEqual(decoder.getstate(), (b'abc', 123456789)) def test_setstate_validates_input(self): decoder = codecs.getincrementaldecoder('euc_jp')() self.assertRaises(TypeError, decoder.setstate, 123) self.assertRaises(TypeError, decoder.setstate, ("invalid", 0)) self.assertRaises(TypeError, decoder.setstate, (b"1234", "invalid")) self.assertRaises(UnicodeError, decoder.setstate, (b"123456789", 0)) class Test_StreamReader(unittest.TestCase): def test_bug1728403(self): try: f = open(TESTFN, 'wb') try: f.write(b'\xa1') finally: f.close() f = codecs.open(TESTFN, encoding='cp949') try: self.assertRaises(UnicodeDecodeError, f.read, 2) finally: f.close() finally: support.unlink(TESTFN) class Test_StreamWriter(unittest.TestCase): def test_gb18030(self): s= io.BytesIO() c = codecs.getwriter('gb18030')(s) c.write('123') self.assertEqual(s.getvalue(), b'123') c.write('\U00012345') self.assertEqual(s.getvalue(), b'123\x907\x959') c.write('\uac00\u00ac') self.assertEqual(s.getvalue(), b'123\x907\x959\x827\xcf5\x810\x851') def test_utf_8(self): s= io.BytesIO() c = codecs.getwriter('utf-8')(s) c.write('123') self.assertEqual(s.getvalue(), b'123') c.write('\U00012345') self.assertEqual(s.getvalue(), b'123\xf0\x92\x8d\x85') c.write('\uac00\u00ac') self.assertEqual(s.getvalue(), b'123\xf0\x92\x8d\x85' b'\xea\xb0\x80\xc2\xac') def test_streamwriter_strwrite(self): s = io.BytesIO() wr = codecs.getwriter('gb18030')(s) wr.write('abcd') self.assertEqual(s.getvalue(), b'abcd') class Test_ISO2022(unittest.TestCase): def test_g2(self): iso2022jp2 = b'\x1b(B:hu4:unit\x1b.A\x1bNi de famille' uni = ':hu4:unit\xe9 de famille' self.assertEqual(iso2022jp2.decode('iso2022-jp-2'), uni) def test_iso2022_jp_g0(self): self.assertNotIn(b'\x0e', '\N{SOFT HYPHEN}'.encode('iso-2022-jp-2')) for encoding in ('iso-2022-jp-2004', 'iso-2022-jp-3'): e = '\u3406'.encode(encoding) self.assertFalse(any(x > 0x80 for x in e)) def test_bug1572832(self): for x in range(0x10000, 0x110000): # Any ISO 2022 codec will cause the segfault chr(x).encode('iso_2022_jp', 'ignore') class TestStateful(unittest.TestCase): text = '\u4E16\u4E16' encoding = 'iso-2022-jp' expected = b'\x1b$B@$@$' reset = b'\x1b(B' expected_reset = expected + reset def test_encode(self): self.assertEqual(self.text.encode(self.encoding), self.expected_reset) def test_incrementalencoder(self): encoder = codecs.getincrementalencoder(self.encoding)() output = b''.join( encoder.encode(char) for char in self.text) self.assertEqual(output, self.expected) self.assertEqual(encoder.encode('', final=True), self.reset) self.assertEqual(encoder.encode('', final=True), b'') def test_incrementalencoder_final(self): encoder = codecs.getincrementalencoder(self.encoding)() last_index = len(self.text) - 1 output = b''.join( encoder.encode(char, index == last_index) for index, char in enumerate(self.text)) self.assertEqual(output, self.expected_reset) self.assertEqual(encoder.encode('', final=True), b'') class TestHZStateful(TestStateful): text = '\u804a\u804a' encoding = 'hz' expected = b'~{ADAD' reset = b'~}' expected_reset = expected + reset if __name__ == "__main__": unittest.main()