def test_it_returns_the_last_accessed_tag(self):
policy = MRUPolicy()
items = OrderedDict()
items['foo'] = ''
items['bar'] = ''
items['bang'] = ''
self.assertEqual(policy.remove(items)[0], 'bang')
def test_it_returns_an_item(self):
tag = uuid.uuid4()
data = uuid.uuid4()
cache = Cache(uuid.UUID, uuid.UUID, 5, 10, MRUPolicy())
cache.add(tag, data)
self.assertEqual(cache.get(tag), data)
def test_building_a_cache(self):
tag = uuid.uuid4()
data = uuid.uuid4()
cache = Cache(uuid.UUID, uuid.UUID, 5, 10, MRUPolicy())
self.assertEqual(cache.get(uuid.uuid4()), None)
cache.add(tag, data)
self.assertEqual(cache.get(tag), data)
def test_value_is_type_safe_when_adding(self):
cache = Cache(str, int, 5, 10, MRUPolicy())
cache.add('123', 123)
return self.assertRaises(ValueError, cache.add, '123', '')
def test_tag_is_type_safe_when_adding(self):
cache = Cache(int, str, 5, 10, MRUPolicy())
cache.add(123, '')
return self.assertRaises(ValueError, cache.add, 'foo', '')
def test_tag_is_type_safe_when_getting(self):
cache = Cache(int, str, 5, 10, MRUPolicy())
cache.get(123)
return self.assertRaises(ValueError, cache.get, 'foo')
def test_it_returns_none(self):
cache = Cache(uuid.UUID, uuid.UUID, 5, 10, MRUPolicy())
self.assertEqual(cache.get(uuid.uuid4()), None)