def test_dependents(self):
dependent_cache_name = self.check_cache_gone('dependent')
dependent_cache = PersistentCache(dependent_cache_name, cache_manager=self.manager)
parent_cache_name = self.check_cache_gone('parent')
parent_cache = PersistentCache(parent_cache_name, cache_manager=self.manager, dependents=[dependent_cache])
dependent_cache['foo'] = 'bar'
parent_cache.save(True)
dependent_cache['foo'] = 'saved'
parent_cache.load(True)
self.assertEqual(dependent_cache['foo'], 'bar')
dependent_cache['foo'] = 'invalid'
parent_cache.invalidate(True)
self.assertEqual(dependent_cache['foo'], 'bar')
parent_cache.delete_saved_content(True)
parent_cache.load(True)
self.assertIsNone(dependent_cache.contents)
parent_cache.load_or_build(True)
self.assertDictEqual(dependent_cache.contents, {})
dependent_cache['foo'] = 'bar'
dependent_cache.save()
parent_cache.invalidate_and_rebuild(True)
self.assertDictEqual(dependent_cache.contents, {})
def test_delete_saved(self):
cache_name = self.check_cache_gone('delete_saved')
cache = PersistentCache(cache_name, cache_manager=self.manager, contents={ 'foo': 'bar' })
cache.delete_saved_content()
self.check_cache_gone(cache_name)
self.assertEqual(cache['foo'], 'bar') # Shouldn't delete memory
cache.load()
self.assertIsNone(cache.contents) # No content to load
cache.load_or_build()
self.assert_contents_equal(cache, {})
def test_validation(self):
cache_name = self.check_cache_gone('validation')
cache = PersistentCache(cache_name, cache_manager=self.manager, contents={ 'foo': 'bar' },
validator=lambda *args: False, builder=lambda *args: ['built'])
cache.save()
cache.load_or_build() # Invalid load, force rebuild
self.assert_contents_equal(cache, ['built'])
cache[0] = 'changed'
cache.save()
cache.validator = lambda *args: True
cache.load()
self.assert_contents_equal(cache, ['changed'])
# Raising an exception in validator should invalidate the cache
cache.validator = lambda *args: args['not legal']
cache.load()
self.assert_contents_equal(cache, None)
