class MagicHashingTests(unittest.TestCase):
"""Test magic content hashing."""
def setUp(self):
"""Set up."""
self.hasher = MagicContentHash()
def test_hashing_empty(self):
"""Test the hashing for no data."""
r = self.hasher.hash_object.hexdigest()
s = hashlib.sha1("Ubuntu One").hexdigest()
self.assertEqual(r, s)
def test_hashing_content_once(self):
"""Test the hashing for some content sent once."""
self.hasher.update("foobar")
r = self.hasher.hash_object.hexdigest()
s = hashlib.sha1("Ubuntu Onefoobar").hexdigest()
self.assertEqual(r, s)
def test_hashing_content_upadting(self):
"""Test the hashing for some content sent more than once."""
c1 = os.urandom(1000)
c2 = os.urandom(1000)
self.hasher.update(c1)
self.hasher.update(c2)
r = self.hasher.hash_object.hexdigest()
s = hashlib.sha1("Ubuntu One" + c1 + c2).hexdigest()
self.assertEqual(r, s)
def test_hexdigest_hiding(self):
"""Can not access the hex digest."""
self.assertRaises(NotImplementedError, self.hasher.hexdigest)
def test_digest_hiding(self):
"""Can not access the digest."""
self.assertRaises(NotImplementedError, self.hasher.digest)
def test_content_hash_hiding(self):
"""The content hash is not the content hash!"""
self.hasher.update("foobar")
hexdigest = self.hasher.hash_object.hexdigest()
ch = self.hasher.content_hash()
# not a string, and never show the content
self.assertFalse(isinstance(ch, basestring))
self.assertFalse(hexdigest in str(ch))
self.assertFalse(hexdigest in repr(ch))
# we have the real value hidden in the object
self.assertEqual('magic_hash:' + hexdigest, ch._magic_hash)
def test_not_pickable(self):
"""The magic hasher and value can not be pickled"""
# the hasher
self.assertRaises(NotImplementedError, pickle.dumps, self.hasher)
# the value
ch = self.hasher.content_hash()
self.assertRaises(NotImplementedError, pickle.dumps, ch)
def setUp(self):
"""Set up."""
self.hasher = MagicContentHash()
