def test_permacache_should_return_data_from_db_if_data_source_barfs(self):
def data_source_fetch_data(data_source):
raise Exception()
data_source = MockDataSource(self.Cache_key_of_prestored)
data_returned_from_fetch_all = perma_cache(data_source_fetch_data)(data_source)
key = db.Key.from_path("CachedData", self.Cache_key_of_prestored)
data_from_database = CachedData.get(key).data
data_from_database_rehydrated = json.loads(data_from_database)
self.assertEquals(data_from_database_rehydrated, data_returned_from_fetch_all)
def test_permacache_should_always_write_returned_data_to_db(self):
def data_source_fetch_data(data_source):
return [{'data': 1}, {'data': 2}]
cache_key = '23421'
data_source = MockDataSource(cache_key)
data_returned_from_fetch_all = perma_cache(data_source_fetch_data)(data_source)
key = db.Key.from_path("CachedData", cache_key)
data_from_database = CachedData.get(key).data
data_from_database_rehydrated = json.loads(data_from_database)
self.assertEquals(data_from_database_rehydrated, data_returned_from_fetch_all)
def test_permacache_should_return_data_from_db_if_data_source_barfs(self):
def data_source_fetch_data(data_source):
raise Exception()
data_source = MockDataSource(self.Cache_key_of_prestored)
data_returned_from_fetch_all = perma_cache(data_source_fetch_data)(
data_source)
key = db.Key.from_path("CachedData", self.Cache_key_of_prestored)
data_from_database = CachedData.get(key).data
data_from_database_rehydrated = json.loads(data_from_database)
self.assertEquals(data_from_database_rehydrated,
data_returned_from_fetch_all)
def test_permacache_should_always_write_returned_data_to_db(self):
def data_source_fetch_data(data_source):
return [{'data': 1}, {'data': 2}]
cache_key = '23421'
data_source = MockDataSource(cache_key)
data_returned_from_fetch_all = perma_cache(data_source_fetch_data)(
data_source)
key = db.Key.from_path("CachedData", cache_key)
data_from_database = CachedData.get(key).data
data_from_database_rehydrated = json.loads(data_from_database)
self.assertEquals(data_from_database_rehydrated,
data_returned_from_fetch_all)
