import unittest
from baim.actions import Action, Kind, Decision
from baim.authority import Authority, Rejected
from baim.state import State


class ActionTests(unittest.TestCase):
    def test_round_trip_escaping(self):
        action = Action(Kind.TYPE, ('e1', 'quotes " newline\nUnicode नमस्ते'))
        self.assertEqual(Action.parse(action.encode()), action)

    def test_reject_bad_wire(self):
        for wire in ['C["e1", "extra"]', 'Q[]', 'W[true]', 'W[-1]', 'W[2001]',
                     'F{}', 'T["e1"]', 'C["e1"] trailing', 'S[0,99999]']:
            with self.subTest(wire=wire), self.assertRaises(ValueError):
                Action.parse(wire)

    def test_task_replacement_and_replay(self):
        authority = Authority()
        authority.replace('First')
        state = State('doc', 1, 'http://localhost', ())
        ticket = authority.ticket(state)
        authority.consume()
        with self.assertRaises(Rejected):
            authority.validate(ticket, state)
        ticket = authority.ticket(state)
        authority.replace('Second')
        with self.assertRaises(Rejected):
            authority.validate(ticket, state)

    def test_confidence_is_not_fabricated(self):
        self.assertIsNone(Decision(None, Action(Kind.FINISH)).action_confidence)
        with self.assertRaises(ValueError):
            Decision(None, Action(Kind.FINISH), float('nan'))