Python BlockCache Examples

Example #1

File: test_caches.py Project: rsignell-usgs/filesystem_spec

def test_block_cache_lru():
    cache = BlockCache(4, letters_fetcher, len(string.ascii_letters), maxblocks=2)
    # miss
    cache[0:2]
    assert cache.cache_info().hits == 0
    assert cache.cache_info().misses == 1
    assert cache.cache_info().currsize == 1

    # hit
    cache[0:2]
    assert cache.cache_info().hits == 1
    assert cache.cache_info().misses == 1
    assert cache.cache_info().currsize == 1

    # miss
    cache[4:6]
    assert cache.cache_info().hits == 1
    assert cache.cache_info().misses == 2
    assert cache.cache_info().currsize == 2

    # miss & evict
    cache[12:13]
    assert cache.cache_info().hits == 1
    assert cache.cache_info().misses == 3
    assert cache.cache_info().currsize == 2

Example #2

File: test_caches.py Project: xyb/filesystem_spec

def test_block_cache_lru():
    cache = BlockCache(4, letters_fetcher, len(string.ascii_letters), maxblocks=2)
    # miss
    cache._fetch(0, 2)
    assert cache.cache_info().misses == 1
    assert cache.cache_info().currsize == 1

    # hit
    cache._fetch(0, 2)
    assert cache.cache_info().misses == 1
    assert cache.cache_info().currsize == 1

    # miss
    cache._fetch(4, 6)
    assert cache.cache_info().misses == 2
    assert cache.cache_info().currsize == 2

    # miss & evict
    cache._fetch(12, 13)
    assert cache.cache_info().misses == 3
    assert cache.cache_info().currsize == 2