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Hard code some known values, generated on the master branch preceding these

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changes.
This commit is contained in:
Itamar Turner-Trauring 2020-07-16 14:33:53 -04:00
parent 7abc54c429
commit efbae9b3e3
1 changed files with 17 additions and 1 deletions
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18
src/allmydata/test/test_base62.py
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@ -27,7 +27,7 @@ from allmydata.util import base62, mathutil
def insecurerandstr(n):
return bytes(list(map(random.randrange, [0]*n, [256]*n)))
class T(unittest.TestCase):
class Base62(unittest.TestCase):
def _test_num_octets_that_encode_to_this_many_chars(self, chars, octets):
assert base62.num_octets_that_encode_to_this_many_chars(chars) == octets, "%s != %s <- %s" % (octets, base62.num_octets_that_encode_to_this_many_chars(chars), chars)
@ -43,6 +43,22 @@ class T(unittest.TestCase):
def test_roundtrip(self, input_bytes):
self._test_roundtrip(input_bytes)
def test_known_values(self):
"""Known values to ensure the algorithm hasn't changed."""
def check_expected(plaintext, encoded):
result1 = base62.b2a(plaintext)
self.assertEqual(encoded, result1)
result2 = base62.a2b(encoded)
self.assertEqual(plaintext, result2)
check_expected(b"hello", b'7tQLFHz')
check_expected(b"", b'0')
check_expected(b"zzz", b'0Xg7e')
check_expected(b"\x36\xffWAT", b'49pq4mq')
check_expected(b"1234 22323", b'1A0afZe9mxSZpz')
check_expected(b"______", b'0TmAuCHJX')
def test_num_octets_that_encode_to_this_many_chars(self):
return self._test_num_octets_that_encode_to_this_many_chars(2, 1)
return self._test_num_octets_that_encode_to_this_many_chars(3, 2)