def test_basic(self):
timeout = 10
lock = Lock('basic', timeout=timeout)
assert lock.held is False
assert lock.seconds_remaining is 0
assert lock.acquire() is True
assert timeout > lock.seconds_remaining > (timeout - 0.1)
assert lock.held is True
assert lock.acquire() is True # ensure reentrancy
assert lock.release() is True
assert lock.seconds_remaining is 0
assert lock.held is False
assert lock.release() is False
def try_lock(item):
"""
Attempt to immedately acquire a lock on the timeline at
key, returning the lock if it can be acquired, otherwise
returning ``None``.
"""
key, timestamp = item
lock = Lock(make_timeline_key(self.namespace, key), timeout=5, nowait=True)
return lock if lock.acquire() else None, item
def test_basic(self):
timeout = 10
lock = Lock('basic', timeout=timeout)
assert lock.held is False
assert lock.seconds_remaining is 0
assert lock.acquire() is True
assert timeout > lock.seconds_remaining > (timeout - 0.1)
assert lock.held is True
with pytest.raises(LockAlreadyHeld):
lock.acquire()
assert lock.release() is True
assert lock.seconds_remaining is 0
assert lock.held is False
assert lock.release() is False
