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import unittest
import cachetools
class DecoratorTestMixin(object):
def cache(self, minsize):
raise NotImplementedError
def func(self, *args, **kwargs):
if hasattr(self, 'count'):
self.count += 1
else:
self.count = 0
return self.count
def test_decorator(self):
cache = self.cache(2)
wrapper = cachetools.cached(cache)(self.func)
self.assertEqual(len(cache), 0)
self.assertEqual(wrapper.__wrapped__, self.func)
self.assertEqual(wrapper(0), 0)
self.assertEqual(len(cache), 1)
self.assertIn(cachetools.hashkey(0), cache)
self.assertNotIn(cachetools.hashkey(1), cache)
self.assertNotIn(cachetools.hashkey(1.0), cache)
self.assertEqual(wrapper(1), 1)
self.assertEqual(len(cache), 2)
self.assertIn(cachetools.hashkey(0), cache)
self.assertIn(cachetools.hashkey(1), cache)
self.assertIn(cachetools.hashkey(1.0), cache)
self.assertEqual(wrapper(1), 1)
self.assertEqual(len(cache), 2)
self.assertEqual(wrapper(1.0), 1)
self.assertEqual(len(cache), 2)
self.assertEqual(wrapper(1.0), 1)
self.assertEqual(len(cache), 2)
def test_decorator_typed(self):
cache = self.cache(3)
def typedkey(*args, **kwargs):
key = cachetools.hashkey(*args, **kwargs)
key += tuple(type(v) for v in args)
key += tuple(type(v) for _, v in sorted(kwargs.items()))
return key
wrapper = cachetools.cached(cache, key=typedkey)(self.func)
self.assertEqual(len(cache), 0)
self.assertEqual(wrapper.__wrapped__, self.func)
self.assertEqual(wrapper(0), 0)
self.assertEqual(len(cache), 1)
self.assertIn(typedkey(0), cache)
self.assertNotIn(typedkey(1), cache)
self.assertNotIn(typedkey(1.0), cache)
self.assertEqual(wrapper(1), 1)
self.assertEqual(len(cache), 2)
self.assertIn(typedkey(0), cache)
self.assertIn(typedkey(1), cache)
self.assertNotIn(typedkey(1.0), cache)
self.assertEqual(wrapper(1), 1)
self.assertEqual(len(cache), 2)
self.assertEqual(wrapper(1.0), 2)
self.assertEqual(len(cache), 3)
self.assertIn(typedkey(0), cache)
self.assertIn(typedkey(1), cache)
self.assertIn(typedkey(1.0), cache)
self.assertEqual(wrapper(1.0), 2)
self.assertEqual(len(cache), 3)
def test_decorator_lock(self):
class Lock(object):
count = 0
def __enter__(self):
Lock.count += 1
def __exit__(self, *exc):
pass
cache = self.cache(2)
wrapper = cachetools.cached(cache, lock=Lock())(self.func)
self.assertEqual(len(cache), 0)
self.assertEqual(wrapper.__wrapped__, self.func)
self.assertEqual(wrapper(0), 0)
self.assertEqual(Lock.count, 2)
self.assertEqual(wrapper(1), 1)
self.assertEqual(Lock.count, 4)
self.assertEqual(wrapper(1), 1)
self.assertEqual(Lock.count, 5)
class CacheWrapperTest(unittest.TestCase, DecoratorTestMixin):
def cache(self, minsize):
return cachetools.Cache(maxsize=minsize)
def test_zero_size_cache_decorator(self):
cache = self.cache(0)
wrapper = cachetools.cached(cache)(self.func)
self.assertEqual(len(cache), 0)
self.assertEqual(wrapper.__wrapped__, self.func)
self.assertEqual(wrapper(0), 0)
self.assertEqual(len(cache), 0)
def test_zero_size_cache_decorator_lock(self):
class Lock(object):
count = 0
def __enter__(self):
Lock.count += 1
def __exit__(self, *exc):
pass
cache = self.cache(0)
wrapper = cachetools.cached(cache, lock=Lock())(self.func)
self.assertEqual(len(cache), 0)
self.assertEqual(wrapper.__wrapped__, self.func)
self.assertEqual(wrapper(0), 0)
self.assertEqual(len(cache), 0)
self.assertEqual(Lock.count, 2)
class DictWrapperTest(unittest.TestCase, DecoratorTestMixin):
def cache(self, minsize):
return dict()
class NoneWrapperTest(unittest.TestCase):
def func(self, *args, **kwargs):
return args + tuple(kwargs.items())
def test_decorator(self):
wrapper = cachetools.cached(None)(self.func)
self.assertEqual(wrapper.__wrapped__, self.func)
self.assertEqual(wrapper(0), (0,))
self.assertEqual(wrapper(1), (1,))
self.assertEqual(wrapper(1, foo='bar'), (1, ('foo', 'bar')))
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