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# SPDX-License-Identifier: AGPL-3.0-or-later
"""
Tests for database utilities.
"""
import threading
import time
from .. import db
def test_db_lock_no_wait():
"""Test that lock is immediately by first user."""
lock = db.DBLock()
start_time = time.time()
with lock:
pass
end_time = time.time()
assert end_time - start_time < 0.1
def test_db_lock_max_wait():
"""Test that lock waits only for timeout period."""
event = threading.Event()
lock = db.DBLock()
lock.timeout = 0.25
def thread_func():
with lock:
event.set()
time.sleep(0.3)
thread = threading.Thread(target=thread_func)
thread.start()
event.wait()
start_time = time.time()
with lock as return_value:
pass
end_time = time.time()
assert end_time - start_time < 0.27
assert not return_value
def test_db_lock_release():
"""Test that lock is available after release."""
event = threading.Event()
lock = db.DBLock()
lock.timeout = 0.25
def thread_func():
with lock:
event.set()
time.sleep(0.2)
thread = threading.Thread(target=thread_func)
thread.start()
event.wait()
start_time = time.time()
with lock as return_value:
pass
end_time = time.time()
assert return_value
assert end_time - start_time <= 0.23
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