test_reachability.py

import unittest

from BaseClasses import CollectionState
from worlds.AutoWorld import AutoWorldRegister
from . import setup_solo_multiworld


class TestBase(unittest.TestCase):
    gen_steps = ["generate_early", "create_regions", "create_items", "set_rules", "generate_basic", "pre_fill"]

    default_settings_unreachable_regions = {
        "A Link to the Past": {
            "Chris Houlihan Room",  # glitch room by definition
            "Desert Northern Cliffs",  # on top of mountain, only reachable via OWG
            "Dark Death Mountain Bunny Descent Area"  # OWG Mountain descent
        },
        "Ocarina of Time": {
            "Prelude of Light Warp",  # Prelude is not progression by default
            "Serenade of Water Warp",  # Serenade is not progression by default
            "Lost Woods Mushroom Timeout",  # trade quest starts after this item
            "ZD Eyeball Frog Timeout",  # trade quest starts after this item
            "ZR Top of Waterfall",  # dummy region used for entrance shuffle
        },
        # The following SM regions are only used when the corresponding StartLocation option is selected (so not with
        # default settings). Also, those don't have any entrances as they serve as starting Region (that's why they
        # have to be excluded for testAllStateCanReachEverything).
        "Super Metroid": {
            "Ceres",
            "Gauntlet Top",
            "Mama Turtle"
        }
    }

    def test_default_all_state_can_reach_everything(self):
        """Ensure all state can reach everything and complete the game with the defined options"""
        for game_name, world_type in AutoWorldRegister.world_types.items():
            unreachable_regions = self.default_settings_unreachable_regions.get(game_name, set())
            with self.subTest("Game", game=game_name):
                multiworld = setup_solo_multiworld(world_type)
                excluded = multiworld.worlds[1].options.exclude_locations.value
                state = multiworld.get_all_state(False)
                for location in multiworld.get_locations():
                    if location.name not in excluded:
                        with self.subTest("Location should be reached", location=location):
                            self.assertTrue(location.can_reach(state), f"{location.name} unreachable")

                for region in multiworld.get_regions():
                    if region.name in unreachable_regions:
                        with self.subTest("Region should be unreachable", region=region):
                            self.assertFalse(region.can_reach(state))
                    else:
                        with self.subTest("Region should be reached", region=region):
                            self.assertTrue(region.can_reach(state))

                with self.subTest("Completion Condition"):
                    self.assertTrue(multiworld.can_beat_game(state))

    def test_default_empty_state_can_reach_something(self):
        """Ensure empty state can reach at least one location with the defined options"""
        for game_name, world_type in AutoWorldRegister.world_types.items():
            with self.subTest("Game", game=game_name):
                multiworld = setup_solo_multiworld(world_type)
                state = CollectionState(multiworld)
                all_locations = multiworld.get_locations()
                if all_locations:
                    locations = set()
                    for location in all_locations:
                        if location.can_reach(state):
                            locations.add(location)
                    self.assertGreater(len(locations), 0,
                                       msg="Need to be able to reach at least one location to get started.")