def test_standalone_immediate_detection():
detector = StandaloneMasterDetector(leader='foo')
event = threading.Event()
future = detector.detect(previous=None)
future.add_done_callback(lambda f: event.set())
event.wait(timeout=1.0)
assert event.is_set()
assert future.result() == 'foo'
def test_standalone_immediate_detection():
master_pid = PID.from_string('master(1)@192.168.33.2:12345')
detector = StandaloneMasterDetector(leader=master_pid)
event = threading.Event()
future = detector.detect(previous=None)
future.add_done_callback(lambda f: event.set())
event.wait(timeout=1.0)
assert event.is_set()
assert future.result() == master_pid
def test_standalone_change_detection():
detector = StandaloneMasterDetector(leader='foo')
event = threading.Event()
future = detector.detect(previous='foo')
future.add_done_callback(lambda f: event.set())
assert future.running()
assert not event.is_set()
detector.appoint('bar')
event.wait(timeout=1.0)
assert event.is_set()
