def test_extend_another_instance(conn):
"""It is possible to extend a lock using another instance of Lock with the
same name.
"""
name = 'foobar'
key_name = 'lock:' + name
lock = Lock(conn, name, expire=100)
lock.acquire()
assert 0 <= conn.ttl(key_name) <= 100
another_lock = Lock(conn, name, id=lock.id)
another_lock.extend(1000)
assert conn.ttl(key_name) > 100
def test_extend_another_instance(conn):
"""It is possible to extend a lock using another instance of Lock with the
same name.
"""
name = 'foobar'
key_name = 'lock:' + name
lock = Lock(conn, name, expire=100)
lock.acquire()
assert 0 <= conn.ttl(key_name) <= 100
another_lock = Lock(conn, name, id=lock.id)
another_lock.extend(1000)
assert conn.ttl(key_name) > 100
def test_given_id(conn):
"""It is possible to extend a lock using another instance of Lock with the
same name.
"""
name = 'foobar'
key_name = 'lock:' + name
orig = Lock(conn, name, expire=100, id=b"a")
orig.acquire()
pytest.raises(TypeError, Lock, conn, name, id=object())
lock = Lock(conn, name, id=b"a")
pytest.raises(AlreadyAcquired, lock.acquire)
lock.extend(100)
lock.release() # this works, note that this ain't the object that acquired the lock
pytest.raises(NotAcquired, orig.release) # and this fails because lock was released above
assert conn.ttl(key_name) == -2
def test_extend_another_instance_different_id_fail(conn):
"""It is impossible to extend a lock using another instance of Lock with
the same name, but different id.
"""
name = 'foobar'
key_name = 'lock:' + name
lock = Lock(conn, name, expire=100)
lock.acquire()
assert 0 <= conn.ttl(key_name) <= 100
another_lock = Lock(conn, name)
with pytest.raises(NotAcquired):
another_lock.extend(1000)
assert conn.ttl(key_name) <= 100
assert lock.id != another_lock.id
def test_extend_another_instance_different_id_fail(conn):
"""It is impossible to extend a lock using another instance of Lock with
the same name, but different id.
"""
name = 'foobar'
key_name = 'lock:' + name
lock = Lock(conn, name, expire=100)
lock.acquire()
assert 0 <= conn.ttl(key_name) <= 100
another_lock = Lock(conn, name)
with pytest.raises(NotAcquired):
another_lock.extend(1000)
assert conn.ttl(key_name) <= 100
assert lock.id != another_lock.id
def test_given_id(conn):
"""It is possible to extend a lock using another instance of Lock with the
same name.
"""
name = 'foobar'
key_name = 'lock:' + name
orig = Lock(conn, name, expire=100, id=b"a")
orig.acquire()
pytest.raises(TypeError, Lock, conn, name, id=object())
lock = Lock(conn, name, id=b"a")
pytest.raises(AlreadyAcquired, lock.acquire)
lock.extend(100)
lock.release() # this works, note that this ain't the object that acquired the lock
pytest.raises(NotAcquired, orig.release) # and this fails because lock was released above
assert conn.ttl(key_name) == -2
