def test__get_cache_items_to_delete(tmpdir):
memory, expected_hash_cachedirs, _ = _setup_toy_cache(tmpdir)
cachedir = memory.cachedir
cache_items = _get_cache_items(cachedir)
# bytes_limit set to keep only one cache item (each hash cache
# folder is about 1000 bytes + metadata)
cache_items_to_delete = _get_cache_items_to_delete(cachedir, '2K')
nb_hashes = len(expected_hash_cachedirs)
assert set.issubset(set(cache_items_to_delete), set(cache_items))
assert len(cache_items_to_delete) == nb_hashes - 1
# Sanity check bytes_limit=2048 is the same as bytes_limit='2K'
cache_items_to_delete_2048b = _get_cache_items_to_delete(cachedir, 2048)
assert sorted(cache_items_to_delete) == sorted(cache_items_to_delete_2048b)
# bytes_limit greater than the size of the cache
cache_items_to_delete_empty = _get_cache_items_to_delete(cachedir, '1M')
assert cache_items_to_delete_empty == []
# All the cache items need to be deleted
bytes_limit_too_small = 500
cache_items_to_delete_500b = _get_cache_items_to_delete(
cachedir, bytes_limit_too_small)
assert set(cache_items_to_delete_500b), set(cache_items)
# Test LRU property: surviving cache items should all have a more
# recent last_access that the ones that have been deleted
cache_items_to_delete_6000b = _get_cache_items_to_delete(cachedir, 6000)
surviving_cache_items = set(cache_items).difference(
cache_items_to_delete_6000b)
assert (max(ci.last_access for ci in cache_items_to_delete_6000b) <= min(
ci.last_access for ci in surviving_cache_items))
def test__get_cache_items_to_delete(tmpdir):
mem, expected_hash_cachedirs, _ = _setup_temporary_cache_folder(tmpdir)
cachedir = mem.cachedir
cache_items = _get_cache_items(cachedir)
# bytes_limit set to keep only one cache item (each hash cache
# folder is about 1000 bytes + metadata)
cache_items_to_delete = _get_cache_items_to_delete(cachedir, '2K')
nb_hashes = len(expected_hash_cachedirs)
assert set.issubset(set(cache_items_to_delete), set(cache_items))
assert len(cache_items_to_delete) == nb_hashes - 1
# Sanity check bytes_limit=2048 is the same as bytes_limit='2K'
cache_items_to_delete_2048b = _get_cache_items_to_delete(cachedir, 2048)
assert sorted(cache_items_to_delete) == sorted(cache_items_to_delete_2048b)
# bytes_limit greater than the size of the cache
cache_items_to_delete_empty = _get_cache_items_to_delete(cachedir, '1M')
assert cache_items_to_delete_empty == []
# All the cache items need to be deleted
bytes_limit_too_small = 500
cache_items_to_delete_500b = _get_cache_items_to_delete(
cachedir, bytes_limit_too_small)
assert set(cache_items_to_delete_500b), set(cache_items)
# Test LRU property: surviving cache items should all have a more
# recent last_access that the ones that have been deleted
cache_items_to_delete_6000b = _get_cache_items_to_delete(cachedir, 6000)
surviving_cache_items = set(cache_items).difference(
cache_items_to_delete_6000b)
assert (max(ci.last_access for ci in cache_items_to_delete_6000b) <=
min(ci.last_access for ci in surviving_cache_items))
def test__get_cache_items_to_delete():
mem, expected_hash_cachedirs, _ = _setup_temporary_cache_folder()
cachedir = mem.cachedir
cache_items = _get_cache_items(cachedir)
# bytes_limit set to keep only one cache item (each hash cache
# folder is about 1000 bytes + metadata)
cache_items_to_delete = _get_cache_items_to_delete(cachedir, '2K')
nb_hashes = len(expected_hash_cachedirs)
nose.tools.assert_true(
set.issubset(set(cache_items_to_delete), set(cache_items)))
nose.tools.assert_equal(len(cache_items_to_delete), nb_hashes - 1)
# Sanity check bytes_limit=2048 is the same as bytes_limit='2K'
cache_items_to_delete_2048b = _get_cache_items_to_delete(cachedir, 2048)
nose.tools.assert_equal(sorted(cache_items_to_delete),
sorted(cache_items_to_delete_2048b))
# bytes_limit greater than the size of the cache
cache_items_to_delete_empty = _get_cache_items_to_delete(cachedir, '1M')
nose.tools.assert_equal(cache_items_to_delete_empty, [])
# All the cache items need to be deleted
bytes_limit_too_small = 500
cache_items_to_delete_500b = _get_cache_items_to_delete(
cachedir, bytes_limit_too_small)
nose.tools.assert_true(set(cache_items_to_delete_500b), set(cache_items))
# Test LRU property: surviving cache items should all have a more
# recent last_access that the ones that have been deleted
cache_items_to_delete_6000b = _get_cache_items_to_delete(cachedir, 6000)
surviving_cache_items = set(cache_items).difference(
cache_items_to_delete_6000b)
nose.tools.assert_true(
max(ci.last_access for ci in cache_items_to_delete_6000b) <= min(
ci.last_access for ci in surviving_cache_items))
