def test_going_through_door(): P = Variable("P", "P") room = Variable("room", "r") kitchen = Variable("kitchen", "r") state = State(KnowledgeBase.default().logic) state.add_facts([ Proposition("at", [P, room]), Proposition("north_of", [kitchen, room]), Proposition("free", [kitchen, room]), Proposition("free", [room, kitchen]), Proposition("south_of", [room, kitchen]) ]) options = ChainingOptions() options.backward = True options.max_depth = 3 options.max_length = 3 options.subquests = True options.create_variables = True options.rules_per_depth = [ [KnowledgeBase.default().rules["take/c"], KnowledgeBase.default().rules["take/s"]], KnowledgeBase.default().rules.get_matching("go.*"), [KnowledgeBase.default().rules["open/d"]], ] chains = list(get_chains(state, options)) assert len(chains) == 18
def test_backward_chaining(): P = Variable("P", "P") room = Variable("room", "r") kitchen = Variable("kitchen", "r") state = State(KnowledgeBase.default().logic, [ Proposition("at", [P, room]), Proposition("north_of", [kitchen, room]), Proposition("south_of", [room, kitchen]), ]) options = ChainingOptions() options.backward = True options.max_depth = 2 options.max_length = 2 options.subquests = True options.create_variables = True options.rules_per_depth = [ [ KnowledgeBase.default().rules["take/c"], KnowledgeBase.default().rules["take/s"] ], [KnowledgeBase.default().rules["open/c"]], ] options.restricted_types = {"d"} chains = list(get_chains(state, options)) assert len(chains) == 3 options = ChainingOptions() options.backward = True options.max_depth = 3 options.max_length = 3 options.subquests = True options.create_variables = True options.rules_per_depth = [ [KnowledgeBase.default().rules["put"]], [KnowledgeBase.default().rules["go/north"]], [KnowledgeBase.default().rules["take/c"]], ] options.restricted_types = {"d"} chains = list(get_chains(state, options)) assert len(chains) == 3