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import datetime
import sys
import unittest
from pathlib import Path
from unittest import mock
from urllib.parse import quote_plus
from django.test import SimpleTestCase
from django.utils.encoding import (
DjangoUnicodeDecodeError, escape_uri_path, filepath_to_uri, force_bytes,
force_str, get_system_encoding, iri_to_uri, repercent_broken_unicode,
smart_bytes, smart_str, uri_to_iri,
)
from django.utils.functional import SimpleLazyObject
from django.utils.translation import gettext_lazy
class TestEncodingUtils(SimpleTestCase):
def test_force_str_exception(self):
"""
Broken __str__ actually raises an error.
"""
class MyString:
def __str__(self):
return b'\xc3\xb6\xc3\xa4\xc3\xbc'
# str(s) raises a TypeError if the result is not a text type.
with self.assertRaises(TypeError):
force_str(MyString())
def test_force_str_lazy(self):
s = SimpleLazyObject(lambda: 'x')
self.assertIs(type(force_str(s)), str)
def test_force_str_DjangoUnicodeDecodeError(self):
msg = (
"'utf-8' codec can't decode byte 0xff in position 0: invalid "
"start byte. You passed in b'\\xff' (<class 'bytes'>)"
)
with self.assertRaisesMessage(DjangoUnicodeDecodeError, msg):
force_str(b'\xff')
def test_force_bytes_exception(self):
"""
force_bytes knows how to convert to bytes an exception
containing non-ASCII characters in its args.
"""
error_msg = "This is an exception, voilà"
exc = ValueError(error_msg)
self.assertEqual(force_bytes(exc), error_msg.encode())
self.assertEqual(force_bytes(exc, encoding='ascii', errors='ignore'), b'This is an exception, voil')
def test_force_bytes_strings_only(self):
today = datetime.date.today()
self.assertEqual(force_bytes(today, strings_only=True), today)
def test_force_bytes_encoding(self):
error_msg = 'This is an exception, voilà'.encode()
result = force_bytes(error_msg, encoding='ascii', errors='ignore')
self.assertEqual(result, b'This is an exception, voil')
def test_force_bytes_memory_view(self):
data = b'abc'
result = force_bytes(memoryview(data))
# Type check is needed because memoryview(bytes) == bytes.
self.assertIs(type(result), bytes)
self.assertEqual(result, data)
def test_smart_bytes(self):
class Test:
def __str__(self):
return 'ŠĐĆŽćžšđ'
lazy_func = gettext_lazy('x')
self.assertIs(smart_bytes(lazy_func), lazy_func)
self.assertEqual(smart_bytes(Test()), b'\xc5\xa0\xc4\x90\xc4\x86\xc5\xbd\xc4\x87\xc5\xbe\xc5\xa1\xc4\x91')
self.assertEqual(smart_bytes(1), b'1')
self.assertEqual(smart_bytes('foo'), b'foo')
def test_smart_str(self):
class Test:
def __str__(self):
return 'ŠĐĆŽćžšđ'
lazy_func = gettext_lazy('x')
self.assertIs(smart_str(lazy_func), lazy_func)
self.assertEqual(smart_str(Test()), '\u0160\u0110\u0106\u017d\u0107\u017e\u0161\u0111')
self.assertEqual(smart_str(1), '1')
self.assertEqual(smart_str('foo'), 'foo')
def test_get_default_encoding(self):
with mock.patch('locale.getdefaultlocale', side_effect=Exception):
self.assertEqual(get_system_encoding(), 'ascii')
def test_repercent_broken_unicode_recursion_error(self):
# Prepare a string long enough to force a recursion error if the tested
# function uses recursion.
data = b'\xfc' * sys.getrecursionlimit()
try:
self.assertEqual(repercent_broken_unicode(data), b'%FC' * sys.getrecursionlimit())
except RecursionError:
self.fail('Unexpected RecursionError raised.')
class TestRFC3987IEncodingUtils(unittest.TestCase):
def test_filepath_to_uri(self):
self.assertIsNone(filepath_to_uri(None))
self.assertEqual(filepath_to_uri('upload\\чубака.mp4'), 'upload/%D1%87%D1%83%D0%B1%D0%B0%D0%BA%D0%B0.mp4')
self.assertEqual(filepath_to_uri(Path('upload/test.png')), 'upload/test.png')
self.assertEqual(filepath_to_uri(Path('upload\\test.png')), 'upload/test.png')
def test_iri_to_uri(self):
cases = [
# Valid UTF-8 sequences are encoded.
('red%09rosé#red', 'red%09ros%C3%A9#red'),
('/blog/for/Jürgen Münster/', '/blog/for/J%C3%BCrgen%20M%C3%BCnster/'),
('locations/%s' % quote_plus('Paris & Orléans'), 'locations/Paris+%26+Orl%C3%A9ans'),
# Reserved chars remain unescaped.
('%&', '%&'),
('red&♥ros%#red', 'red&%E2%99%A5ros%#red'),
(gettext_lazy('red&♥ros%#red'), 'red&%E2%99%A5ros%#red'),
]
for iri, uri in cases:
with self.subTest(iri):
self.assertEqual(iri_to_uri(iri), uri)
# Test idempotency.
self.assertEqual(iri_to_uri(iri_to_uri(iri)), uri)
def test_uri_to_iri(self):
cases = [
(None, None),
# Valid UTF-8 sequences are decoded.
('/%e2%89%Ab%E2%99%a5%E2%89%aB/', '/≫♥≫/'),
('/%E2%99%A5%E2%99%A5/?utf8=%E2%9C%93', '/♥♥/?utf8=✓'),
('/%41%5a%6B/', '/AZk/'),
# Reserved and non-URL valid ASCII chars are not decoded.
('/%25%20%02%41%7b/', '/%25%20%02A%7b/'),
# Broken UTF-8 sequences remain escaped.
('/%AAd%AAj%AAa%AAn%AAg%AAo%AA/', '/%AAd%AAj%AAa%AAn%AAg%AAo%AA/'),
('/%E2%99%A5%E2%E2%99%A5/', '/♥%E2♥/'),
('/%E2%99%A5%E2%99%E2%99%A5/', '/♥%E2%99♥/'),
('/%E2%E2%99%A5%E2%99%A5%99/', '/%E2♥♥%99/'),
('/%E2%99%A5%E2%99%A5/?utf8=%9C%93%E2%9C%93%9C%93', '/♥♥/?utf8=%9C%93✓%9C%93'),
]
for uri, iri in cases:
with self.subTest(uri):
self.assertEqual(uri_to_iri(uri), iri)
# Test idempotency.
self.assertEqual(uri_to_iri(uri_to_iri(uri)), iri)
def test_complementarity(self):
cases = [
('/blog/for/J%C3%BCrgen%20M%C3%BCnster/', '/blog/for/J\xfcrgen%20M\xfcnster/'),
('%&', '%&'),
('red&%E2%99%A5ros%#red', 'red&♥ros%#red'),
('/%E2%99%A5%E2%99%A5/', '/♥♥/'),
('/%E2%99%A5%E2%99%A5/?utf8=%E2%9C%93', '/♥♥/?utf8=✓'),
('/%25%20%02%7b/', '/%25%20%02%7b/'),
('/%AAd%AAj%AAa%AAn%AAg%AAo%AA/', '/%AAd%AAj%AAa%AAn%AAg%AAo%AA/'),
('/%E2%99%A5%E2%E2%99%A5/', '/♥%E2♥/'),
('/%E2%99%A5%E2%99%E2%99%A5/', '/♥%E2%99♥/'),
('/%E2%E2%99%A5%E2%99%A5%99/', '/%E2♥♥%99/'),
('/%E2%99%A5%E2%99%A5/?utf8=%9C%93%E2%9C%93%9C%93', '/♥♥/?utf8=%9C%93✓%9C%93'),
]
for uri, iri in cases:
with self.subTest(uri):
self.assertEqual(iri_to_uri(uri_to_iri(uri)), uri)
self.assertEqual(uri_to_iri(iri_to_uri(iri)), iri)
def test_escape_uri_path(self):
cases = [
(
'/;some/=awful/?path/:with/@lots/&of/+awful/chars',
'/%3Bsome/%3Dawful/%3Fpath/:with/@lots/&of/+awful/chars',
),
('/foo#bar', '/foo%23bar'),
('/foo?bar', '/foo%3Fbar'),
]
for uri, expected in cases:
with self.subTest(uri):
self.assertEqual(escape_uri_path(uri), expected)
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