def test_signals_with_explicit_doc_ids(self):
        ei = self.ExplicitId(id=123)
        # post save must received the created flag, even if there's already
        # an object id present
        self.assertEqual(self.get_signal_output(ei.save), ['Is created'])
        # second time, it must be an update
        self.assertEqual(self.get_signal_output(ei.save), ['Is updated'])
Model saves must have a created flag the first time.
dataset/ETHPy150Open MongoEngine/mongoengine/tests/test_signals.py/SignalTests.test_signals_with_explicit_doc_ids