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import unittest
import cachetools.func
class DecoratorTestMixin:
def decorator(self, maxsize, **kwargs):
return self.DECORATOR(maxsize, **kwargs)
def test_decorator(self):
cached = self.decorator(maxsize=2)(lambda n: n)
self.assertEqual(cached.cache_parameters(), {"maxsize": 2, "typed": False})
self.assertEqual(cached.cache_info(), (0, 0, 2, 0))
self.assertEqual(cached(1), 1)
self.assertEqual(cached.cache_info(), (0, 1, 2, 1))
self.assertEqual(cached(1), 1)
self.assertEqual(cached.cache_info(), (1, 1, 2, 1))
self.assertEqual(cached(1.0), 1.0)
self.assertEqual(cached.cache_info(), (2, 1, 2, 1))
def test_decorator_clear(self):
cached = self.decorator(maxsize=2)(lambda n: n)
self.assertEqual(cached.cache_parameters(), {"maxsize": 2, "typed": False})
self.assertEqual(cached.cache_info(), (0, 0, 2, 0))
self.assertEqual(cached(1), 1)
self.assertEqual(cached.cache_info(), (0, 1, 2, 1))
cached.cache_clear()
self.assertEqual(cached.cache_info(), (0, 0, 2, 0))
self.assertEqual(cached(1), 1)
self.assertEqual(cached.cache_info(), (0, 1, 2, 1))
def test_decorator_nocache(self):
cached = self.decorator(maxsize=0)(lambda n: n)
self.assertEqual(cached.cache_parameters(), {"maxsize": 0, "typed": False})
self.assertEqual(cached.cache_info(), (0, 0, 0, 0))
self.assertEqual(cached(1), 1)
self.assertEqual(cached.cache_info(), (0, 1, 0, 0))
self.assertEqual(cached(1), 1)
self.assertEqual(cached.cache_info(), (0, 2, 0, 0))
self.assertEqual(cached(1.0), 1.0)
self.assertEqual(cached.cache_info(), (0, 3, 0, 0))
def test_decorator_unbound(self):
cached = self.decorator(maxsize=None)(lambda n: n)
self.assertEqual(cached.cache_parameters(), {"maxsize": None, "typed": False})
self.assertEqual(cached.cache_info(), (0, 0, None, 0))
self.assertEqual(cached(1), 1)
self.assertEqual(cached.cache_info(), (0, 1, None, 1))
self.assertEqual(cached(1), 1)
self.assertEqual(cached.cache_info(), (1, 1, None, 1))
self.assertEqual(cached(1.0), 1.0)
self.assertEqual(cached.cache_info(), (2, 1, None, 1))
def test_decorator_typed(self):
cached = self.decorator(maxsize=2, typed=True)(lambda n: n)
self.assertEqual(cached.cache_parameters(), {"maxsize": 2, "typed": True})
self.assertEqual(cached.cache_info(), (0, 0, 2, 0))
self.assertEqual(cached(1), 1)
self.assertEqual(cached.cache_info(), (0, 1, 2, 1))
self.assertEqual(cached(1), 1)
self.assertEqual(cached.cache_info(), (1, 1, 2, 1))
self.assertEqual(cached(1.0), 1.0)
self.assertEqual(cached.cache_info(), (1, 2, 2, 2))
self.assertEqual(cached(1.0), 1.0)
self.assertEqual(cached.cache_info(), (2, 2, 2, 2))
def test_decorator_user_function(self):
cached = self.decorator(lambda n: n)
self.assertEqual(cached.cache_parameters(), {"maxsize": 128, "typed": False})
self.assertEqual(cached.cache_info(), (0, 0, 128, 0))
self.assertEqual(cached(1), 1)
self.assertEqual(cached.cache_info(), (0, 1, 128, 1))
self.assertEqual(cached(1), 1)
self.assertEqual(cached.cache_info(), (1, 1, 128, 1))
self.assertEqual(cached(1.0), 1.0)
self.assertEqual(cached.cache_info(), (2, 1, 128, 1))
def test_decorator_needs_rlock(self):
cached = self.decorator(lambda n: n)
class RecursiveEquals:
def __init__(self, use_cache):
self._use_cache = use_cache
def __hash__(self):
return hash(self._use_cache)
def __eq__(self, other):
if self._use_cache:
# This call will happen while the cache-lock is held,
# requiring a reentrant lock to avoid deadlock.
cached(self)
return self._use_cache == other._use_cache
# Prime the cache.
cached(RecursiveEquals(False))
cached(RecursiveEquals(True))
# Then do a call which will cause a deadlock with a non-reentrant lock.
self.assertEqual(cached(RecursiveEquals(True)), RecursiveEquals(True))
class FIFODecoratorTest(unittest.TestCase, DecoratorTestMixin):
DECORATOR = staticmethod(cachetools.func.fifo_cache)
class LFUDecoratorTest(unittest.TestCase, DecoratorTestMixin):
DECORATOR = staticmethod(cachetools.func.lfu_cache)
class LRUDecoratorTest(unittest.TestCase, DecoratorTestMixin):
DECORATOR = staticmethod(cachetools.func.lru_cache)
class MRUDecoratorTest(unittest.TestCase, DecoratorTestMixin):
def decorator(self, maxsize, **kwargs):
import warnings
with warnings.catch_warnings(record=True) as w:
warnings.simplefilter("always")
d = cachetools.func.mru_cache(maxsize, **kwargs)
self.assertNotEqual(len(w), 0)
self.assertIs(w[0].category, DeprecationWarning)
return d
class RRDecoratorTest(unittest.TestCase, DecoratorTestMixin):
DECORATOR = staticmethod(cachetools.func.rr_cache)
class TTLDecoratorTest(unittest.TestCase, DecoratorTestMixin):
DECORATOR = staticmethod(cachetools.func.ttl_cache)