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test_core.py
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1462 lines (1042 loc) · 34.7 KB
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"Test diskcache.core.Cache."
import collections as co
import errno
import functools as ft
import hashlib
import io
import os
import os.path as op
import pickle
import pytest
import random
import shutil
import sqlite3
import subprocess as sp
import sys
import tempfile
import threading
import time
import unittest
import warnings
from unittest import mock
import diskcache as dc
pytestmark = pytest.mark.filterwarnings('ignore', category=dc.EmptyDirWarning)
@pytest.fixture
def cache():
with dc.Cache() as cache:
yield cache
shutil.rmtree(cache.directory, ignore_errors=True)
def test_init(cache):
for key, value in dc.DEFAULT_SETTINGS.items():
assert getattr(cache, key) == value
cache.check()
cache.close()
cache.close()
def test_init_disk():
with dc.Cache(disk_pickle_protocol=1, disk_min_file_size=2 ** 20) as cache:
key = (None, 0, 'abc')
cache[key] = 0
cache.check()
assert cache.disk_min_file_size == 2 ** 20
assert cache.disk_pickle_protocol == 1
shutil.rmtree(cache.directory, ignore_errors=True)
def test_disk_reset():
with dc.Cache(disk_min_file_size=0, disk_pickle_protocol=0) as cache:
value = (None, 0, 'abc')
cache[0] = value
cache.check()
assert cache.disk_min_file_size == 0
assert cache.disk_pickle_protocol == 0
assert cache._disk.min_file_size == 0
assert cache._disk.pickle_protocol == 0
cache.reset('disk_min_file_size', 2 ** 10)
cache.reset('disk_pickle_protocol', 2)
cache[1] = value
cache.check()
assert cache.disk_min_file_size == 2 ** 10
assert cache.disk_pickle_protocol == 2
assert cache._disk.min_file_size == 2 ** 10
assert cache._disk.pickle_protocol == 2
shutil.rmtree(cache.directory, ignore_errors=True)
def test_disk_valueerror():
with pytest.raises(ValueError):
with dc.Cache(disk=dc.Disk('test')):
pass
def test_custom_disk():
with dc.Cache(disk=dc.JSONDisk, disk_compress_level=6) as cache:
values = [None, True, 0, 1.23, {}, [None] * 10000]
for value in values:
cache[value] = value
for value in values:
assert cache[value] == value
shutil.rmtree(cache.directory, ignore_errors=True)
class SHA256FilenameDisk(dc.Disk):
def filename(self, key=dc.UNKNOWN, value=dc.UNKNOWN):
filename = hashlib.sha256(key).hexdigest()[:32]
full_path = op.join(self._directory, filename)
return filename, full_path
def test_custom_filename_disk():
with dc.Cache(disk=SHA256FilenameDisk) as cache:
for count in range(100, 200):
key = str(count).encode('ascii')
cache[key] = str(count) * int(1e5)
for count in range(100, 200):
key = str(count).encode('ascii')
filename = hashlib.sha256(key).hexdigest()[:32]
full_path = op.join(cache.directory, filename)
with open(full_path) as reader:
content = reader.read()
assert content == str(count) * int(1e5)
shutil.rmtree(cache.directory, ignore_errors=True)
def test_init_makedirs():
cache_dir = tempfile.mkdtemp()
shutil.rmtree(cache_dir)
makedirs = mock.Mock(side_effect=OSError(errno.EACCES))
with pytest.raises(EnvironmentError):
try:
with mock.patch('os.makedirs', makedirs):
cache = dc.Cache(cache_dir)
except EnvironmentError:
shutil.rmtree(cache_dir, ignore_errors=True)
raise
def test_pragma_error(cache):
local = mock.Mock()
con = mock.Mock()
execute = mock.Mock()
cursor = mock.Mock()
fetchall = mock.Mock()
local.pid = os.getpid()
local.con = con
con.execute = execute
execute.return_value = cursor
cursor.fetchall = fetchall
fetchall.side_effect = [sqlite3.OperationalError] * 60000
size = 2 ** 28
with mock.patch('time.sleep', lambda num: 0):
with mock.patch.object(cache, '_local', local):
with pytest.raises(sqlite3.OperationalError):
cache.reset('sqlite_mmap_size', size)
def test_close_error(cache):
class LocalTest(object):
def __init__(self):
self._calls = 0
def __getattr__(self, name):
if self._calls:
raise AttributeError
else:
self._calls += 1
return mock.Mock()
with mock.patch.object(cache, '_local', LocalTest()):
cache.close()
def test_getsetdel(cache):
values = [
(None, False),
((None,) * 2 ** 20, False),
(1234, False),
(2 ** 512, False),
(56.78, False),
(u'hello', False),
(u'hello' * 2 ** 20, False),
(b'world', False),
(b'world' * 2 ** 20, False),
(io.BytesIO(b'world' * 2 ** 20), True),
]
for key, (value, file_like) in enumerate(values):
assert cache.set(key, value, read=file_like)
assert len(cache) == len(values)
for key, (value, file_like) in enumerate(values):
if file_like:
assert cache[key] == value.getvalue()
else:
assert cache[key] == value
for key, _ in enumerate(values):
del cache[key]
assert len(cache) == 0
for value, (key, _) in enumerate(values):
cache[key] = value
assert len(cache) == len(values)
for value, (key, _) in enumerate(values):
assert cache[key] == value
for _, (key, _) in enumerate(values):
del cache[key]
assert len(cache) == 0
cache.check()
def test_get_keyerror1(cache):
with pytest.raises(KeyError):
cache[0]
def test_get_keyerror4(cache):
func = mock.Mock(side_effect=IOError(errno.ENOENT, ''))
cache.reset('statistics', True)
cache[0] = b'abcd' * 2 ** 20
with mock.patch('diskcache.core.open', func):
with pytest.raises((IOError, KeyError, OSError)):
cache[0]
def test_read(cache):
cache.set(0, b'abcd' * 2 ** 20)
with cache.read(0) as reader:
assert reader is not None
def test_read_keyerror(cache):
with pytest.raises(KeyError):
with cache.read(0) as reader:
pass
def test_set_twice(cache):
large_value = b'abcd' * 2 ** 20
cache[0] = 0
cache[0] = 1
assert cache[0] == 1
cache[0] = large_value
assert cache[0] == large_value
with cache.get(0, read=True) as reader:
assert reader.name is not None
cache[0] = 2
assert cache[0] == 2
assert cache.get(0, read=True) == 2
cache.check()
def test_set_timeout(cache):
local = mock.Mock()
con = mock.Mock()
execute = mock.Mock()
local.pid = os.getpid()
local.con = con
con.execute = execute
execute.side_effect = sqlite3.OperationalError
with pytest.raises(dc.Timeout):
try:
with mock.patch.object(cache, '_local', local):
cache.set('a', 'b' * 2 ** 20)
finally:
cache.check()
def test_raw(cache):
assert cache.set(0, io.BytesIO(b'abcd'), read=True)
assert cache[0] == b'abcd'
def test_get(cache):
assert cache.get(0) is None
assert cache.get(1, 'dne') == 'dne'
assert cache.get(2, {}) == {}
assert cache.get(0, expire_time=True, tag=True) == (None, None, None)
assert cache.set(0, 0, expire=None, tag=u'number')
assert cache.get(0, expire_time=True) == (0, None)
assert cache.get(0, tag=True) == (0, u'number')
assert cache.get(0, expire_time=True, tag=True) == (0, None, u'number')
def test_get_expired_fast_path(cache):
assert cache.set(0, 0, expire=0.001)
time.sleep(0.01)
assert cache.get(0) is None
def test_get_ioerror_fast_path(cache):
assert cache.set(0, 0)
disk = mock.Mock()
put = mock.Mock()
fetch = mock.Mock()
disk.put = put
put.side_effect = [(0, True)]
disk.fetch = fetch
io_error = IOError()
io_error.errno = errno.ENOENT
fetch.side_effect = io_error
with mock.patch.object(cache, '_disk', disk):
assert cache.get(0) is None
def test_get_expired_slow_path(cache):
cache.stats(enable=True)
cache.reset('eviction_policy', 'least-recently-used')
assert cache.set(0, 0, expire=0.001)
time.sleep(0.01)
assert cache.get(0) is None
def test_get_ioerror_slow_path(cache):
cache.reset('eviction_policy', 'least-recently-used')
cache.set(0, 0)
disk = mock.Mock()
put = mock.Mock()
fetch = mock.Mock()
disk.put = put
put.side_effect = [(0, True)]
disk.fetch = fetch
io_error = IOError()
io_error.errno = errno.EACCES
fetch.side_effect = io_error
with mock.patch.object(cache, '_disk', disk):
with pytest.raises(IOError):
cache.get(0)
def test_pop(cache):
assert cache.incr('alpha') == 1
assert cache.pop('alpha') == 1
assert cache.get('alpha') is None
assert cache.check() == []
assert cache.set('alpha', 123, expire=1, tag='blue')
assert cache.pop('alpha', tag=True) == (123, 'blue')
assert cache.set('beta', 456, expire=1e-9, tag='green')
time.sleep(0.01)
assert cache.pop('beta', 'dne') == 'dne'
assert cache.set('gamma', 789, tag='red')
assert cache.pop('gamma', expire_time=True, tag=True) == (789, None, 'red')
assert cache.pop('dne') is None
assert cache.set('delta', 210)
assert cache.pop('delta', expire_time=True) == (210, None)
assert cache.set('epsilon', '0' * 2 ** 20)
assert cache.pop('epsilon') == '0' * 2 ** 20
def test_pop_ioerror(cache):
assert cache.set(0, 0)
disk = mock.Mock()
put = mock.Mock()
fetch = mock.Mock()
disk.put = put
put.side_effect = [(0, True)]
disk.fetch = fetch
io_error = IOError()
io_error.errno = errno.ENOENT
fetch.side_effect = io_error
with mock.patch.object(cache, '_disk', disk):
assert cache.pop(0) is None
def test_pop_ioerror_eacces(cache):
assert cache.set(0, 0)
disk = mock.Mock()
put = mock.Mock()
fetch = mock.Mock()
disk.put = put
put.side_effect = [(0, True)]
disk.fetch = fetch
io_error = IOError()
io_error.errno = errno.EACCES
fetch.side_effect = io_error
with mock.patch.object(cache, '_disk', disk):
with pytest.raises(IOError):
cache.pop(0)
def test_delete(cache):
cache[0] = 0
assert cache.delete(0)
assert len(cache) == 0
assert not cache.delete(0)
assert len(cache.check()) == 0
def test_del(cache):
with pytest.raises(KeyError):
del cache[0]
def test_del_expired(cache):
cache.set(0, 0, expire=0.001)
time.sleep(0.01)
with pytest.raises(KeyError):
del cache[0]
def test_stats(cache):
cache[0] = 0
assert cache.stats(enable=True) == (0, 0)
for _ in range(100):
cache[0]
for _ in range(10):
cache.get(1)
assert cache.stats(reset=True) == (100, 10)
assert cache.stats(enable=False) == (0, 0)
for _ in range(100):
cache[0]
for _ in range(10):
cache.get(1)
assert cache.stats() == (0, 0)
assert len(cache.check()) == 0
def test_path(cache):
cache[0] = u'abc'
large_value = b'abc' * 2 ** 20
cache[1] = large_value
assert cache.get(0, read=True) == u'abc'
with cache.get(1, read=True) as reader:
assert reader.name is not None
path = reader.name
with open(path, 'rb') as reader:
value = reader.read()
assert value == large_value
assert len(cache.check()) == 0
def test_expire_rows(cache):
cache.reset('cull_limit', 0)
for value in range(10):
assert cache.set(value, value, expire=1e-9)
for value in range(10, 15):
assert cache.set(value, value)
assert len(cache) == 15
time.sleep(0.01)
cache.reset('cull_limit', 10)
assert cache.set(15, 15)
assert len(cache) == 6
assert len(cache.check()) == 0
def test_least_recently_stored(cache):
cache.reset('eviction_policy', u'least-recently-stored')
cache.reset('size_limit', int(10.1e6))
cache.reset('cull_limit', 2)
million = b'x' * int(1e6)
for value in range(10):
cache[value] = million
assert len(cache) == 10
for value in range(10):
assert cache[value] == million
for value in range(10, 20):
cache[value] = million
assert len(cache) == 10
for value in range(10):
cache[value] = million
count = len(cache)
for index, length in enumerate([1, 2, 3, 4]):
cache[10 + index] = million * length
assert len(cache) == count - length
assert cache[12] == million * 3
assert cache[13] == million * 4
assert len(cache.check()) == 0
def test_least_recently_used(cache):
cache.reset('eviction_policy', u'least-recently-used')
cache.reset('size_limit', int(10.1e6))
cache.reset('cull_limit', 5)
million = b'x' * int(1e6)
for value in range(10):
cache[value] = million
assert len(cache) == 10
time.sleep(0.01)
cache[0]
cache[1]
cache[7]
cache[8]
cache[9]
cache[10] = million
assert len(cache) == 6
for value in [0, 1, 7, 8, 9, 10]:
assert cache[value] == million
assert len(cache.check()) == 0
def test_least_frequently_used(cache):
cache.reset('eviction_policy', u'least-frequently-used')
cache.reset('size_limit', int(10.1e6))
cache.reset('cull_limit', 5)
million = b'x' * int(1e6)
for value in range(10):
cache[value] = million
assert len(cache) == 10
cache[0], cache[0], cache[0], cache[0], cache[0]
cache[1], cache[1], cache[1], cache[1]
cache[7], cache[7], cache[7]
cache[8], cache[8]
cache[9]
cache[10] = million
assert len(cache) == 6
for value in [0, 1, 7, 8, 9, 10]:
assert cache[value] == million
assert len(cache.check()) == 0
def test_filename_error(cache):
func = mock.Mock(side_effect=OSError(errno.EACCES))
with mock.patch('os.makedirs', func):
with pytest.raises(OSError):
cache._disk.filename()
def test_remove_error(cache):
func = mock.Mock(side_effect=OSError(errno.EACCES))
try:
with mock.patch('os.remove', func):
cache._disk.remove('ab/cd/efg.val')
except OSError:
pass
else:
if os.name == 'nt':
pass # File delete errors ignored on Windows.
else:
raise Exception('test_remove_error failed')
def test_check(cache):
blob = b'a' * 2 ** 20
keys = (0, 1, 1234, 56.78, u'hello', b'world', None)
for key in keys:
cache[key] = blob
# Cause mayhem.
with cache.get(0, read=True) as reader:
full_path = reader.name
os.rename(full_path, full_path + '_moved')
with cache.get(1, read=True) as reader:
full_path = reader.name
os.remove(full_path)
cache._sql('UPDATE Cache SET size = 0 WHERE rowid > 1')
cache.reset('count', 0)
cache.reset('size', 0)
with warnings.catch_warnings():
warnings.filterwarnings('ignore')
cache.check()
cache.check(fix=True)
assert len(cache.check()) == 0 # Should display no warnings.
def test_integrity_check(cache):
for value in range(1000):
cache[value] = value
cache.close()
with io.open(op.join(cache.directory, 'cache.db'), 'r+b') as writer:
writer.seek(52)
writer.write(b'\x00\x01') # Should be 0, change it.
cache = dc.Cache(cache.directory)
with warnings.catch_warnings():
warnings.filterwarnings('ignore')
cache.check()
cache.check(fix=True)
assert len(cache.check()) == 0
def test_expire(cache):
cache.reset('cull_limit', 0) # Disable expiring keys on `set`.
now = time.time()
time_time = mock.Mock(return_value=now)
with mock.patch('time.time', time_time):
for value in range(1, 101):
assert cache.set(value, value, expire=value)
assert len(cache) == 100
time_time = mock.Mock(return_value=now + 11)
cache.reset('cull_limit', 10)
with mock.patch('time.time', time_time):
assert cache.expire() == 10
assert len(cache) == 90
assert len(cache.check()) == 0
def test_tag_index():
with dc.Cache(tag_index=True) as cache:
assert cache.tag_index == 1
shutil.rmtree(cache.directory, ignore_errors=True)
def test_evict(cache):
colors = ('red', 'blue', 'yellow')
for value in range(90):
assert cache.set(value, value, tag=colors[value % len(colors)])
assert len(cache) == 90
assert cache.evict('red') == 30
assert len(cache) == 60
assert len(cache.check()) == 0
def test_clear(cache):
for value in range(100):
cache[value] = value
assert len(cache) == 100
assert cache.clear() == 100
assert len(cache) == 0
assert len(cache.check()) == 0
def test_clear_timeout(cache):
transact = mock.Mock()
transact.side_effect = dc.Timeout
with mock.patch.object(cache, '_transact', transact):
with pytest.raises(dc.Timeout):
cache.clear()
def test_tag(cache):
assert cache.set(0, None, tag=u'zero')
assert cache.set(1, None, tag=1234)
assert cache.set(2, None, tag=5.67)
assert cache.set(3, None, tag=b'three')
assert cache.get(0, tag=True) == (None, u'zero')
assert cache.get(1, tag=True) == (None, 1234)
assert cache.get(2, tag=True) == (None, 5.67)
assert cache.get(3, tag=True) == (None, b'three')
def test_with(cache):
with dc.Cache(cache.directory) as tmp:
tmp[u'a'] = 0
tmp[u'b'] = 1
assert cache[u'a'] == 0
assert cache[u'b'] == 1
def test_contains(cache):
assert 0 not in cache
cache[0] = 0
assert 0 in cache
def test_touch(cache):
assert cache.set(0, None, expire=60)
assert cache.touch(0, expire=None)
assert cache.touch(0, expire=0)
assert not cache.touch(0)
def test_add(cache):
assert cache.add(1, 1)
assert cache.get(1) == 1
assert not cache.add(1, 2)
assert cache.get(1) == 1
assert cache.delete(1)
assert cache.add(1, 1, expire=0.001)
time.sleep(0.01)
assert cache.add(1, 1)
cache.check()
def test_add_large_value(cache):
value = b'abcd' * 2 ** 20
assert cache.add(b'test-key', value)
assert cache.get(b'test-key') == value
assert not cache.add(b'test-key', value * 2)
assert cache.get(b'test-key') == value
cache.check()
def test_add_timeout(cache):
local = mock.Mock()
con = mock.Mock()
execute = mock.Mock()
local.pid = os.getpid()
local.con = con
con.execute = execute
execute.side_effect = sqlite3.OperationalError
with pytest.raises(dc.Timeout):
try:
with mock.patch.object(cache, '_local', local):
cache.add(0, 0)
finally:
cache.check()
def test_incr(cache):
assert cache.incr('key', default=5) == 6
assert cache.incr('key', 2) == 8
assert cache.get('key', expire_time=True, tag=True) == (8, None, None)
assert cache.delete('key')
assert cache.set('key', 100, expire=0.100)
assert cache.get('key') == 100
time.sleep(0.120)
assert cache.incr('key') == 1
def test_incr_insert_keyerror(cache):
with pytest.raises(KeyError):
cache.incr('key', default=None)
def test_incr_update_keyerror(cache):
assert cache.set('key', 100, expire=0.100)
assert cache.get('key') == 100
time.sleep(0.120)
with pytest.raises(KeyError):
cache.incr('key', default=None)
def test_decr(cache):
assert cache.decr('key', default=5) == 4
assert cache.decr('key', 2) == 2
assert cache.get('key', expire_time=True, tag=True) == (2, None, None)
assert cache.delete('key')
assert cache.set('key', 100, expire=0.100)
assert cache.get('key') == 100
time.sleep(0.120)
assert cache.decr('key') == -1
def test_iter(cache):
sequence = list('abcdef') + [('g',)]
for index, value in enumerate(sequence):
cache[value] = index
iterator = iter(cache)
assert all(one == two for one, two in zip(sequence, iterator))
cache['h'] = 7
with pytest.raises(StopIteration):
next(iterator)
def test_iter_expire(cache):
cache.reset('cull_limit', 0)
for num in range(100):
cache.set(num, num, expire=1e-9)
assert len(cache) == 100
assert list(cache) == list(range(100))
def test_iter_error(cache):
with pytest.raises(StopIteration):
next(iter(cache))
def test_reversed(cache):
sequence = 'abcdef'
for index, value in enumerate(sequence):
cache[value] = index
iterator = reversed(cache)
pairs = zip(reversed(sequence), iterator)
assert all(one == two for one, two in pairs)
try:
next(iterator)
except StopIteration:
pass
else:
assert False, 'StopIteration expected'
def test_reversed_error(cache):
with pytest.raises(StopIteration):
next(reversed(cache))
def test_push_pull(cache):
for value in range(10):
cache.push(value)
for value in range(10):
_, pull_value = cache.pull()
assert pull_value == value
assert len(cache) == 0
def test_push_pull_prefix(cache):
for value in range(10):
cache.push(value, prefix='key')
for value in range(10):
key, peek_value = cache.peek(prefix='key')
key, pull_value = cache.pull(prefix='key')
assert key.startswith('key')
assert peek_value == value
assert pull_value == value
assert len(cache) == 0
assert len(cache.check()) == 0
def test_push_pull_extras(cache):
cache.push('test')
assert cache.pull() == (500000000000000, 'test')
assert len(cache) == 0
cache.push('test', expire=10)
(key, value), expire_time = cache.peek(expire_time=True)
assert key == 500000000000000
assert value == 'test'
assert expire_time > time.time()
assert len(cache) == 1
(key, value), expire_time = cache.pull(expire_time=True)
assert key == 500000000000000
assert value == 'test'
assert expire_time > time.time()
assert len(cache) == 0
cache.push('test', tag='foo')
(key, value), tag = cache.peek(tag=True)
assert key == 500000000000000
assert value == 'test'
assert tag == 'foo'
assert len(cache) == 1
(key, value), tag = cache.pull(tag=True)
assert key == 500000000000000
assert value == 'test'
assert tag == 'foo'
assert len(cache) == 0
cache.push('test')
(key, value), expire_time, tag = cache.peek(expire_time=True, tag=True)
assert key == 500000000000000
assert value == 'test'
assert expire_time is None
assert tag is None
assert len(cache) == 1
(key, value), expire_time, tag = cache.pull(expire_time=True, tag=True)
assert key == 500000000000000
assert value == 'test'
assert expire_time is None
assert tag is None
assert len(cache) == 0
assert cache.pull(default=(0, 1)) == (0, 1)
assert len(cache.check()) == 0
def test_push_pull_expire(cache):
cache.push(0, expire=0.1)
cache.push(0, expire=0.1)
cache.push(0, expire=0.1)
cache.push(1)
time.sleep(0.2)
assert cache.pull() == (500000000000003, 1)
assert len(cache) == 0
assert len(cache.check()) == 0
def test_push_peek_expire(cache):
cache.push(0, expire=0.1)
cache.push(0, expire=0.1)
cache.push(0, expire=0.1)
cache.push(1)
time.sleep(0.2)
assert cache.peek() == (500000000000003, 1)
assert len(cache) == 1
assert len(cache.check()) == 0
def test_push_pull_large_value(cache):
value = b'test' * (2 ** 20)
cache.push(value)
assert cache.pull() == (500000000000000, value)
assert len(cache) == 0
assert len(cache.check()) == 0
def test_push_peek_large_value(cache):
value = b'test' * (2 ** 20)
cache.push(value)
assert cache.peek() == (500000000000000, value)
assert len(cache) == 1
assert len(cache.check()) == 0
def test_pull_ioerror(cache):
assert cache.push(0) == 500000000000000
disk = mock.Mock()
put = mock.Mock()