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import unittest
import cachetools.keys
class CacheKeysTest(unittest.TestCase):
def test_hashkey(self, key=cachetools.keys.hashkey):
self.assertEqual(key(), key())
self.assertEqual(hash(key()), hash(key()))
self.assertEqual(key(1, 2, 3), key(1, 2, 3))
self.assertEqual(hash(key(1, 2, 3)), hash(key(1, 2, 3)))
self.assertEqual(key(1, 2, 3, x=0), key(1, 2, 3, x=0))
self.assertEqual(hash(key(1, 2, 3, x=0)), hash(key(1, 2, 3, x=0)))
self.assertNotEqual(key(1, 2, 3), key(3, 2, 1))
self.assertNotEqual(key(1, 2, 3), key(1, 2, 3, x=None))
self.assertNotEqual(key(1, 2, 3, x=0), key(1, 2, 3, x=None))
self.assertNotEqual(key(1, 2, 3, x=0), key(1, 2, 3, y=0))
with self.assertRaises(TypeError):
hash(key({}))
# untyped keys compare equal
self.assertEqual(key(1, 2, 3), key(1.0, 2.0, 3.0))
self.assertEqual(hash(key(1, 2, 3)), hash(key(1.0, 2.0, 3.0)))
def methodkey(self, key=cachetools.keys.methodkey):
# similar to hashkey(), but ignores its first positional argument
self.assertEqual(key("x"), key("y"))
self.assertEqual(hash(key("x")), hash(key("y")))
self.assertEqual(key("x", 1, 2, 3), key("y", 1, 2, 3))
self.assertEqual(hash(key("x", 1, 2, 3)), hash(key("y", 1, 2, 3)))
self.assertEqual(key("x", 1, 2, 3, x=0), key("y", 1, 2, 3, x=0))
self.assertEqual(hash(key("x", 1, 2, 3, x=0)), hash(key("y", 1, 2, 3, x=0)))
self.assertNotEqual(key("x", 1, 2, 3), key("x", 3, 2, 1))
self.assertNotEqual(key("x", 1, 2, 3), key("x", 1, 2, 3, x=None))
self.assertNotEqual(key("x", 1, 2, 3, x=0), key("x", 1, 2, 3, x=None))
self.assertNotEqual(key("x", 1, 2, 3, x=0), key("x", 1, 2, 3, y=0))
with self.assertRaises(TypeError):
hash("x", key({}))
# untyped keys compare equal
self.assertEqual(key("x", 1, 2, 3), key("y", 1.0, 2.0, 3.0))
self.assertEqual(hash(key("x", 1, 2, 3)), hash(key("y", 1.0, 2.0, 3.0)))
def test_typedkey(self, key=cachetools.keys.typedkey):
self.assertEqual(key(), key())
self.assertEqual(hash(key()), hash(key()))
self.assertEqual(key(1, 2, 3), key(1, 2, 3))
self.assertEqual(hash(key(1, 2, 3)), hash(key(1, 2, 3)))
self.assertEqual(key(1, 2, 3, x=0), key(1, 2, 3, x=0))
self.assertEqual(hash(key(1, 2, 3, x=0)), hash(key(1, 2, 3, x=0)))
self.assertNotEqual(key(1, 2, 3), key(3, 2, 1))
self.assertNotEqual(key(1, 2, 3), key(1, 2, 3, x=None))
self.assertNotEqual(key(1, 2, 3, x=0), key(1, 2, 3, x=None))
self.assertNotEqual(key(1, 2, 3, x=0), key(1, 2, 3, y=0))
with self.assertRaises(TypeError):
hash(key({}))
# typed keys compare unequal
self.assertNotEqual(key(1, 2, 3), key(1.0, 2.0, 3.0))
def test_typedmethodkey(self, key=cachetools.keys.typedmethodkey):
# similar to typedkey(), but ignores its first positional argument
self.assertEqual(key("x"), key("y"))
self.assertEqual(hash(key("x")), hash(key("y")))
self.assertEqual(key("x", 1, 2, 3), key("y", 1, 2, 3))
self.assertEqual(hash(key("x", 1, 2, 3)), hash(key("y", 1, 2, 3)))
self.assertEqual(key("x", 1, 2, 3, x=0), key("y", 1, 2, 3, x=0))
self.assertEqual(hash(key("x", 1, 2, 3, x=0)), hash(key("y", 1, 2, 3, x=0)))
self.assertNotEqual(key("x", 1, 2, 3), key("x", 3, 2, 1))
self.assertNotEqual(key("x", 1, 2, 3), key("x", 1, 2, 3, x=None))
self.assertNotEqual(key("x", 1, 2, 3, x=0), key("x", 1, 2, 3, x=None))
self.assertNotEqual(key("x", 1, 2, 3, x=0), key("x", 1, 2, 3, y=0))
with self.assertRaises(TypeError):
hash(key("x", {}))
# typed keys compare unequal
self.assertNotEqual(key("x", 1, 2, 3), key("x", 1.0, 2.0, 3.0))
def test_addkeys(self, key=cachetools.keys.hashkey):
self.assertIsInstance(key(), tuple)
self.assertIsInstance(key(1, 2, 3) + key(4, 5, 6), type(key()))
self.assertIsInstance(key(1, 2, 3) + (4, 5, 6), type(key()))
self.assertIsInstance((1, 2, 3) + key(4, 5, 6), type(key()))
def test_pickle(self, key=cachetools.keys.hashkey):
import pickle
for k in [key(), key("abc"), key("abc", 123), key("abc", q="abc")]:
# white-box test: assert cached hash value is not pickled
self.assertEqual(len(k.__dict__), 0)
h = hash(k)
self.assertEqual(len(k.__dict__), 1)
pickled = pickle.loads(pickle.dumps(k))
self.assertEqual(len(pickled.__dict__), 0)
self.assertEqual(k, pickled)
self.assertEqual(h, hash(pickled))