def _prev_index(self, s):
        self.set_index(max(0, self.index - 1))
def test_dummy_request():
    from rasa.nlu.emulators.no_emulator import NoEmulator

    em = NoEmulator()
    norm = em.normalise_request_json({"text": ["arb text"]})
    assert norm == {"text": "arb text", "time": None}

    norm = em.normalise_request_json({"text": ["arb text"], "time": "1499279161658"})
    assert norm == {"text": "arb text", "time": "1499279161658"}