def test_next_no_moves_error(self):
fsm = StateMachine()
data = '''
(role x)
(role o)
(init (cell a))
(init (cell b))
(init (cell c))
(init (cell d))
'''
fsm.store(data=data)
with self.assertRaises(GameError):
fsm.next()
def test_next(self):
fsm = StateMachine()
data = '''
(role x)
(role o)
(init (control x))
(init (cell 0 0 b))
(init (cell 0 1 b))
(init (cell 1 0 b))
(init (cell 1 1 b))
(<= (legal ?player (mark ?x ?y))
(true (cell ?x ?y b))
(true (control ?player)))
(<= (legal x noop) (true (control o)))
(<= (legal o noop) (true (control x)))
; swap control on every turn
(<= (next (control x)) (true (control o)))
(<= (next (control o)) (true (control x)))
(<= (next (cell ?x ?y ?player))
(does ?player (mark ?x ?y))
(true (cell ?x ?y b)))
(<= (next (cell ?x ?y b))
(does ?player (mark ?m ?n))
(true (cell ?x ?y b))
(or (distinct ?m ?x) (distinct ?n ?y)))
'''
fsm.store(data=data)
fsm.move('x', '(mark 0 0)')
fsm.move('o', 'noop')
next = fsm.next()
fsm.db.facts = {}
states = [str(x[0]) for x in next.db.facts[('true', 1)]]
self.assertIn('(cell 0 0 x)', states)
self.assertIn('(control o)', states)
self.assertNotIn(('does', 2), next.db.facts)
