def test_acquire_locks_all_instances(self):
lock1 = PTLock(self.__dummy_lock_id)
lock2 = PTLock(self.__dummy_lock_id)
lock1.acquire()
for lock in (lock1, lock2):
self.assertTrue(lock.is_locked())
lock1.release()
def __init__(self, device_path: str, device_address: int):
self._device_path = device_path
self._device_address = device_address
self._post_read_delay = 0.020
self._post_write_delay = 0.020
self._lock = PTLock(f"i2c_{device_address:#0{4}x}")
self._read_device = None
self._write_device = None
def test_is_locked_method(self):
lock1 = PTLock(self.__dummy_lock_id)
lock2 = PTLock(self.__dummy_lock_id)
lock1.acquire()
for lock in (lock1, lock2):
self.assertTrue(lock.is_locked())
lock1.release()
for lock in (lock1, lock2):
self.assertFalse(lock.is_locked())
def test_acquire_locks_thread_until_unlocked(self):
def acquire_lock(_lock: PTLock):
_lock.acquire()
lock = PTLock(self.__dummy_lock_id)
lock.acquire()
lock2 = PTLock(self.__dummy_lock_id)
thread = Thread(target=acquire_lock, args=[lock2])
thread.start()
self.assertTrue(thread.is_alive())
lock.release()
thread.join()
self.assertFalse(thread.is_alive())
def acquire_lock(_lock: PTLock):
_lock.acquire()
def test_release_a_locked_lock_by_other_object_fails(self):
lock1 = PTLock(self.__dummy_lock_id)
self.assertTrue(lock1.acquire())
lock2 = PTLock(self.__dummy_lock_id)
self.assertFalse(lock2.release())
def test_release_an_unlocked_lock_returns_false(self):
lock = PTLock(self.__dummy_lock_id)
self.assertFalse(lock.release())
def test_release_a_locked_lock_by_same_object_returns_true(self):
lock = PTLock(self.__dummy_lock_id)
self.assertTrue(lock.acquire())
self.assertTrue(lock.release())
def test_acquire_an_already_acquired_lock_by_same_object_fails(self):
lock = PTLock(self.__dummy_lock_id)
self.assertTrue(lock.acquire())
self.assertFalse(lock.acquire())
def test_acquire_success(self):
lock = PTLock(self.__dummy_lock_id)
self.assertTrue(lock.acquire())
def test_chmod_is_called_if_file_doesnt_exist(self, exists_mock):
_ = PTLock(self.__dummy_lock_id)
exists_mock.assert_called_once_with(self.lock_file_path)
mock_os.chmod.assert_called_once_with(self.lock_file_path, 146)
def test_instance_opens_file(self, m):
_ = PTLock(self.__dummy_lock_id)
m.assert_called_with(self.lock_file_path, 'w')