import threading

from xarray.backends import locks


def test_threaded_lock():
    lock1 = locks._get_threaded_lock('foo')
    assert isinstance(lock1, type(threading.Lock()))
    lock2 = locks._get_threaded_lock('foo')
    assert lock1 is lock2

    lock3 = locks._get_threaded_lock('bar')
    assert lock1 is not lock3