def test_cancel_invokes_callbacks(self):
called = False
def cb(fut):
nonlocal called
called = True
f = Future()
f.add_done_callback(cb)
f.cancel()
assert called
def test_cancel_schedules_callbacks(self):
executor = DummyExecutor()
f = Future(executor=executor)
f.add_done_callback(lambda f: None)
f.cancel()
self.assertTrue(executor.done_callbacks)
def test_cancelled(self):
f = Future()
f.cancel()
self.assertTrue(f.cancelled())
