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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.getlocale", 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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