def setUp(self):
""" initialize tests """
self.storage = StorageMemory()
class TestFunctionCache(unittest.TestCase):
""" test caches using a simple dictionary as the storage backend """
_multiprocess_can_split_ = True #< let nose know that tests can run parallel
def setUp(self):
""" initialize tests """
self.storage = StorageMemory()
def test_simple(self):
""" test a simple function """
self.assertEqual(len(self.storage), 0)
@cached(self.storage)
def square(x, y):
return x**2 + y
a = square(2, 1)
self.assertEqual(len(self.storage), 1)
b = square(2, 1)
self.assertEqual(a, b)
self.assertEqual(len(self.storage), 1)
c = square(2, 2)
self.assertNotEqual(a, c)
self.assertEqual(len(self.storage), 2)
def test_clear(self):
""" test clearing the cache """
@cached(self.storage)
def square(x):
return x**2
square(2)
self.assertEqual(len(self.storage), 1)
self.storage.clear()
self.assertEqual(len(self.storage), 0)
square(2)
self.assertEqual(len(self.storage), 1)
def test_clear_kwargs(self):
""" test clearing the cache for particular keywords """
@cached(self.storage)
def square(x, e=2):
if e is None:
e = 1
return x**e
square(2, e=2)
self.assertEqual(len(self.storage), 1)
square(2, e=3)
self.assertEqual(len(self.storage), 2)
square(2, e=None)
self.assertEqual(len(self.storage), 3)
self.storage.clear(kwargs={'e': 2})
self.assertEqual(len(self.storage), 2)
square(2, e=3)
self.assertEqual(len(self.storage), 2)
square(2, e=2)
self.assertEqual(len(self.storage), 3)
def test_ignore_args(self):
""" test ignoring some of the arguments """
@cached(self.storage, ignore_kwargs=['y'])
def square(x, y):
return x**2
a = square(2, y=1)
self.assertEqual(len(self.storage), 1)
b = square(2, y=2)
self.assertEqual(a, b)
self.assertEqual(len(self.storage), 1)
c = square(3, 2)
self.assertNotEqual(a, c)
self.assertEqual(len(self.storage), 2)
def test_object(self):
""" test caching of objects """
def square(x, e=2):
return SimpleResult(x**e, e)
square_cached = cached(self.storage)(square)
a = square_cached(2, e=2)
self.assertEqual(len(self.storage), 1)
self.assertEqual(a, square(2, e=2))
b = square_cached(2, e=3)
self.assertEqual(len(self.storage), 2)
self.assertEqual(b, square(2, e=3))
c = square_cached(2, e=2)
self.assertEqual(len(self.storage), 2)
self.assertEqual(c, square(2, e=2))
self.storage.clear(kwargs={'e': 2})
self.assertEqual(len(self.storage), 1)
self.assertEqual(b, square_cached(2, e=3))
self.assertEqual(len(self.storage), 1)
self.assertEqual(a, square_cached(2, e=2))
self.assertEqual(len(self.storage), 2)