1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
import asyncio
import pytest
import pytest_asyncio
from redis.asyncio.lock import Lock
from redis.exceptions import LockError, LockNotOwnedError
class TestLock:
@pytest_asyncio.fixture()
async def r_decoded(self, create_redis):
redis = await create_redis(decode_responses=True)
yield redis
await redis.flushall()
def get_lock(self, redis, *args, **kwargs):
kwargs["lock_class"] = Lock
return redis.lock(*args, **kwargs)
async def test_lock(self, r):
lock = self.get_lock(r, "foo")
assert await lock.acquire(blocking=False)
assert await r.get("foo") == lock.local.token
assert await r.ttl("foo") == -1
await lock.release()
assert await r.get("foo") is None
async def test_lock_token(self, r):
lock = self.get_lock(r, "foo")
await self._test_lock_token(r, lock)
async def test_lock_token_thread_local_false(self, r):
lock = self.get_lock(r, "foo", thread_local=False)
await self._test_lock_token(r, lock)
async def _test_lock_token(self, r, lock):
assert await lock.acquire(blocking=False, token="test")
assert await r.get("foo") == b"test"
assert lock.local.token == b"test"
assert await r.ttl("foo") == -1
await lock.release()
assert await r.get("foo") is None
assert lock.local.token is None
async def test_locked(self, r):
lock = self.get_lock(r, "foo")
assert await lock.locked() is False
await lock.acquire(blocking=False)
assert await lock.locked() is True
await lock.release()
assert await lock.locked() is False
async def _test_owned(self, client):
lock = self.get_lock(client, "foo")
assert await lock.owned() is False
await lock.acquire(blocking=False)
assert await lock.owned() is True
await lock.release()
assert await lock.owned() is False
lock2 = self.get_lock(client, "foo")
assert await lock.owned() is False
assert await lock2.owned() is False
await lock2.acquire(blocking=False)
assert await lock.owned() is False
assert await lock2.owned() is True
await lock2.release()
assert await lock.owned() is False
assert await lock2.owned() is False
async def test_owned(self, r):
await self._test_owned(r)
async def test_owned_with_decoded_responses(self, r_decoded):
await self._test_owned(r_decoded)
async def test_competing_locks(self, r):
lock1 = self.get_lock(r, "foo")
lock2 = self.get_lock(r, "foo")
assert await lock1.acquire(blocking=False)
assert not await lock2.acquire(blocking=False)
await lock1.release()
assert await lock2.acquire(blocking=False)
assert not await lock1.acquire(blocking=False)
await lock2.release()
async def test_timeout(self, r):
lock = self.get_lock(r, "foo", timeout=10)
assert await lock.acquire(blocking=False)
assert 8 < (await r.ttl("foo")) <= 10
await lock.release()
async def test_float_timeout(self, r):
lock = self.get_lock(r, "foo", timeout=9.5)
assert await lock.acquire(blocking=False)
assert 8 < (await r.pttl("foo")) <= 9500
await lock.release()
async def test_blocking_timeout(self, r, event_loop):
lock1 = self.get_lock(r, "foo")
assert await lock1.acquire(blocking=False)
bt = 0.2
sleep = 0.05
lock2 = self.get_lock(r, "foo", sleep=sleep, blocking_timeout=bt)
start = event_loop.time()
assert not await lock2.acquire()
# The elapsed duration should be less than the total blocking_timeout
assert bt >= (event_loop.time() - start) > bt - sleep
await lock1.release()
async def test_context_manager(self, r):
# blocking_timeout prevents a deadlock if the lock can't be acquired
# for some reason
async with self.get_lock(r, "foo", blocking_timeout=0.2) as lock:
assert await r.get("foo") == lock.local.token
assert await r.get("foo") is None
async def test_context_manager_raises_when_locked_not_acquired(self, r):
await r.set("foo", "bar")
with pytest.raises(LockError):
async with self.get_lock(r, "foo", blocking_timeout=0.1):
pass
async def test_high_sleep_small_blocking_timeout(self, r):
lock1 = self.get_lock(r, "foo")
assert await lock1.acquire(blocking=False)
sleep = 60
bt = 1
lock2 = self.get_lock(r, "foo", sleep=sleep, blocking_timeout=bt)
start = asyncio.get_event_loop().time()
assert not await lock2.acquire()
# the elapsed timed is less than the blocking_timeout as the lock is
# unattainable given the sleep/blocking_timeout configuration
assert bt > (asyncio.get_event_loop().time() - start)
await lock1.release()
async def test_releasing_unlocked_lock_raises_error(self, r):
lock = self.get_lock(r, "foo")
with pytest.raises(LockError):
await lock.release()
async def test_releasing_lock_no_longer_owned_raises_error(self, r):
lock = self.get_lock(r, "foo")
await lock.acquire(blocking=False)
# manually change the token
await r.set("foo", "a")
with pytest.raises(LockNotOwnedError):
await lock.release()
# even though we errored, the token is still cleared
assert lock.local.token is None
async def test_extend_lock(self, r):
lock = self.get_lock(r, "foo", timeout=10)
assert await lock.acquire(blocking=False)
assert 8000 < (await r.pttl("foo")) <= 10000
assert await lock.extend(10)
assert 16000 < (await r.pttl("foo")) <= 20000
await lock.release()
async def test_extend_lock_replace_ttl(self, r):
lock = self.get_lock(r, "foo", timeout=10)
assert await lock.acquire(blocking=False)
assert 8000 < (await r.pttl("foo")) <= 10000
assert await lock.extend(10, replace_ttl=True)
assert 8000 < (await r.pttl("foo")) <= 10000
await lock.release()
async def test_extend_lock_float(self, r):
lock = self.get_lock(r, "foo", timeout=10.0)
assert await lock.acquire(blocking=False)
assert 8000 < (await r.pttl("foo")) <= 10000
assert await lock.extend(10.0)
assert 16000 < (await r.pttl("foo")) <= 20000
await lock.release()
async def test_extending_unlocked_lock_raises_error(self, r):
lock = self.get_lock(r, "foo", timeout=10)
with pytest.raises(LockError):
await lock.extend(10)
async def test_extending_lock_with_no_timeout_raises_error(self, r):
lock = self.get_lock(r, "foo")
assert await lock.acquire(blocking=False)
with pytest.raises(LockError):
await lock.extend(10)
await lock.release()
async def test_extending_lock_no_longer_owned_raises_error(self, r):
lock = self.get_lock(r, "foo", timeout=10)
assert await lock.acquire(blocking=False)
await r.set("foo", "a")
with pytest.raises(LockNotOwnedError):
await lock.extend(10)
async def test_reacquire_lock(self, r):
lock = self.get_lock(r, "foo", timeout=10)
assert await lock.acquire(blocking=False)
assert await r.pexpire("foo", 5000)
assert await r.pttl("foo") <= 5000
assert await lock.reacquire()
assert 8000 < (await r.pttl("foo")) <= 10000
await lock.release()
async def test_reacquiring_unlocked_lock_raises_error(self, r):
lock = self.get_lock(r, "foo", timeout=10)
with pytest.raises(LockError):
await lock.reacquire()
async def test_reacquiring_lock_with_no_timeout_raises_error(self, r):
lock = self.get_lock(r, "foo")
assert await lock.acquire(blocking=False)
with pytest.raises(LockError):
await lock.reacquire()
await lock.release()
async def test_reacquiring_lock_no_longer_owned_raises_error(self, r):
lock = self.get_lock(r, "foo", timeout=10)
assert await lock.acquire(blocking=False)
await r.set("foo", "a")
with pytest.raises(LockNotOwnedError):
await lock.reacquire()
@pytest.mark.onlynoncluster
class TestLockClassSelection:
def test_lock_class_argument(self, r):
class MyLock:
def __init__(self, *args, **kwargs):
pass
lock = r.lock("foo", lock_class=MyLock)
assert type(lock) == MyLock
|
