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webencodings
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tests.py
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# coding: utf-8 """ webencodings.tests ~~~~~~~~~~~~~~~~~~ A basic test suite for Encoding. :copyright: Copyright 2012 by Simon Sapin :license: BSD, see LICENSE for details. """ from __future__ import unicode_literals from . import (lookup, LABELS, decode, encode, iter_decode, iter_encode, IncrementalDecoder, IncrementalEncoder, UTF8) def assert_raises(exception, function, *args, **kwargs): try: function(*args, **kwargs) except exception: return else: # pragma: no cover raise AssertionError('Did not raise %s.' % exception) def test_labels(): assert lookup('utf-8').name == 'utf-8' assert lookup('Utf-8').name == 'utf-8' assert lookup('UTF-8').name == 'utf-8' assert lookup('utf8').name == 'utf-8' assert lookup('utf8').name == 'utf-8' assert lookup('utf8 ').name == 'utf-8' assert lookup(' \r\nutf8\t').name == 'utf-8' assert lookup('u8') is None # Python label. assert lookup('utf-8 ') is None # Non-ASCII white space. assert lookup('US-ASCII').name == 'windows-1252' assert lookup('iso-8859-1').name == 'windows-1252' assert lookup('latin1').name == 'windows-1252' assert lookup('LATIN1').name == 'windows-1252' assert lookup('latin-1') is None assert lookup('LATİN1') is None # ASCII-only case insensitivity. def test_all_labels(): for label in LABELS: assert decode(b'', label) == ('', lookup(label)) assert encode('', label) == b'' for repeat in [0, 1, 12]: output, _ = iter_decode([b''] * repeat, label) assert list(output) == [] assert list(iter_encode([''] * repeat, label)) == [] decoder = IncrementalDecoder(label) assert decoder.decode(b'') == '' assert decoder.decode(b'', final=True) == '' encoder = IncrementalEncoder(label) assert encoder.encode('') == b'' assert encoder.encode('', final=True) == b'' # All encoding names are valid labels too: for name in set(LABELS.values()): assert lookup(name).name == name def test_invalid_label(): assert_raises(LookupError, decode, b'\xEF\xBB\xBF\xc3\xa9', 'invalid') assert_raises(LookupError, encode, 'é', 'invalid') assert_raises(LookupError, iter_decode, [], 'invalid') assert_raises(LookupError, iter_encode, [], 'invalid') assert_raises(LookupError, IncrementalDecoder, 'invalid') assert_raises(LookupError, IncrementalEncoder, 'invalid') def test_decode(): assert decode(b'\x80', 'latin1') == ('€', lookup('latin1')) assert decode(b'\x80', lookup('latin1')) == ('€', lookup('latin1')) assert decode(b'\xc3\xa9', 'utf8') == ('é', lookup('utf8')) assert decode(b'\xc3\xa9', UTF8) == ('é', lookup('utf8')) assert decode(b'\xc3\xa9', 'ascii') == ('é', lookup('ascii')) assert decode(b'\xEF\xBB\xBF\xc3\xa9', 'ascii') == ('é', lookup('utf8')) # UTF-8 with BOM assert decode(b'\xFE\xFF\x00\xe9', 'ascii') == ('é', lookup('utf-16be')) # UTF-16-BE with BOM assert decode(b'\xFF\xFE\xe9\x00', 'ascii') == ('é', lookup('utf-16le')) # UTF-16-LE with BOM assert decode(b'\xFE\xFF\xe9\x00', 'ascii') == ('\ue900', lookup('utf-16be')) assert decode(b'\xFF\xFE\x00\xe9', 'ascii') == ('\ue900', lookup('utf-16le')) assert decode(b'\x00\xe9', 'UTF-16BE') == ('é', lookup('utf-16be')) assert decode(b'\xe9\x00', 'UTF-16LE') == ('é', lookup('utf-16le')) assert decode(b'\xe9\x00', 'UTF-16') == ('é', lookup('utf-16le')) assert decode(b'\xe9\x00', 'UTF-16BE') == ('\ue900', lookup('utf-16be')) assert decode(b'\x00\xe9', 'UTF-16LE') == ('\ue900', lookup('utf-16le')) assert decode(b'\x00\xe9', 'UTF-16') == ('\ue900', lookup('utf-16le')) def test_encode(): assert encode('é', 'latin1') == b'\xe9' assert encode('é', 'utf8') == b'\xc3\xa9' assert encode('é', 'utf8') == b'\xc3\xa9' assert encode('é', 'utf-16') == b'\xe9\x00' assert encode('é', 'utf-16le') == b'\xe9\x00' assert encode('é', 'utf-16be') == b'\x00\xe9' def test_iter_decode(): def iter_decode_to_string(input, fallback_encoding): output, _encoding = iter_decode(input, fallback_encoding) return ''.join(output) assert iter_decode_to_string([], 'latin1') == '' assert iter_decode_to_string([b''], 'latin1') == '' assert iter_decode_to_string([b'\xe9'], 'latin1') == 'é' assert iter_decode_to_string([b'hello'], 'latin1') == 'hello' assert iter_decode_to_string([b'he', b'llo'], 'latin1') == 'hello' assert iter_decode_to_string([b'hell', b'o'], 'latin1') == 'hello' assert iter_decode_to_string([b'\xc3\xa9'], 'latin1') == 'é' assert iter_decode_to_string([b'\xEF\xBB\xBF\xc3\xa9'], 'latin1') == 'é' assert iter_decode_to_string([ b'\xEF\xBB\xBF', b'\xc3', b'\xa9'], 'latin1') == 'é' assert iter_decode_to_string([ b'\xEF\xBB\xBF', b'a', b'\xc3'], 'latin1') == 'a\uFFFD' assert iter_decode_to_string([ b'', b'\xEF', b'', b'', b'\xBB\xBF\xc3', b'\xa9'], 'latin1') == 'é' assert iter_decode_to_string([b'\xEF\xBB\xBF'], 'latin1') == '' assert iter_decode_to_string([b'\xEF\xBB'], 'latin1') == 'ï»' assert iter_decode_to_string([b'\xFE\xFF\x00\xe9'], 'latin1') == 'é' assert iter_decode_to_string([b'\xFF\xFE\xe9\x00'], 'latin1') == 'é' assert iter_decode_to_string([ b'', b'\xFF', b'', b'', b'\xFE\xe9', b'\x00'], 'latin1') == 'é' assert iter_decode_to_string([ b'', b'h\xe9', b'llo'], 'x-user-defined') == 'h\uF7E9llo' def test_iter_encode(): assert b''.join(iter_encode([], 'latin1')) == b'' assert b''.join(iter_encode([''], 'latin1')) == b'' assert b''.join(iter_encode(['é'], 'latin1')) == b'\xe9' assert b''.join(iter_encode(['', 'é', '', ''], 'latin1')) == b'\xe9' assert b''.join(iter_encode(['', 'é', '', ''], 'utf-16')) == b'\xe9\x00' assert b''.join(iter_encode(['', 'é', '', ''], 'utf-16le')) == b'\xe9\x00' assert b''.join(iter_encode(['', 'é', '', ''], 'utf-16be')) == b'\x00\xe9' assert b''.join(iter_encode([ '', 'h\uF7E9', '', 'llo'], 'x-user-defined')) == b'h\xe9llo' def test_x_user_defined(): encoded = b'2,\x0c\x0b\x1aO\xd9#\xcb\x0f\xc9\xbbt\xcf\xa8\xca' decoded = '2,\x0c\x0b\x1aO\uf7d9#\uf7cb\x0f\uf7c9\uf7bbt\uf7cf\uf7a8\uf7ca' encoded = b'aa' decoded = 'aa' assert decode(encoded, 'x-user-defined') == (decoded, lookup('x-user-defined')) assert encode(decoded, 'x-user-defined') == encoded