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from typing import Sequence
import pytest
from sciencebeam_gym.utils.cache import (
MultiLevelCache,
SimpleDictCache
)
KEY_1 = 'key1'
VALUE_1 = 'value1'
@pytest.fixture(name='dict_cache_list')
def _dict_cache_list() -> Sequence[SimpleDictCache]:
return [SimpleDictCache() for _ in range(10)]
class TestMultiLevelCache:
def test_should_return_none_if_not_in_any_cache(
self,
dict_cache_list: Sequence[SimpleDictCache]
):
cache = MultiLevelCache(dict_cache_list[:2])
assert cache.get(KEY_1) is None
def test_should_populate_cache_and_retrieve_item(
self,
dict_cache_list: Sequence[SimpleDictCache]
):
cache = MultiLevelCache(dict_cache_list[:2])
cache[KEY_1] = VALUE_1
assert cache.get(KEY_1) == VALUE_1
def test_should_retrieve_item_from_next_level(
self,
dict_cache_list: Sequence[SimpleDictCache]
):
cache = MultiLevelCache(dict_cache_list[:3])
cache[KEY_1] = VALUE_1
del dict_cache_list[0][KEY_1]
del dict_cache_list[2][KEY_1]
assert cache.get(KEY_1) == VALUE_1