M7+M8: sim engine, combat, archetype bots, autoplay policies

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

backend/tests/test_game.py

@@ -0,0 +1,81 @@
+import pytest
+
+from tft.constants.loader import load_constants
+from tft.model import artifact as artifact_mod
+from tft.sim.autoplay import play_afk, play_econ
+from tft.sim.game import Game, InvalidAction
+from tests.test_sim import make_static
+
+
+@pytest.fixture(scope="module")
+def art():
+    static = make_static()
+    static["meta"]["patch"] = "test"
+    return artifact_mod.build(static)
+
+
+@pytest.fixture(scope="module")
+def cfg():
+    return load_constants(17)
+
+
+def test_afk_game_terminates_last(art, cfg):
+    placements = [play_afk(Game(art, cfg, seed=s)) for s in range(20)]
+    assert all(1 <= p <= 8 for p in placements)
+    assert sum(placements) / len(placements) > 6.5
+
+
+def test_econ_beats_afk(art, cfg):
+    afk = [play_afk(Game(art, cfg, seed=s)) for s in range(30)]
+    econ = [play_econ(Game(art, cfg, seed=1000 + s)) for s in range(30)]
+    assert sum(econ) / len(econ) < sum(afk) / len(afk)
+
+
+def test_same_seed_same_outcome(art, cfg):
+    assert play_econ(Game(art, cfg, seed=7)) == play_econ(Game(art, cfg, seed=7))
+
+
+def test_buy_and_merge(art, cfg):
+    game = Game(art, cfg, seed=1)
+    game.gold = 100
+    api = next(a for a in game.shop if a)
+    unit = {"api_name": api, "stars": 1, "items": []}
+    game.bench = [dict(unit), dict(unit)]
+    game.pool.take(api, 2)
+    game.shop = [api] * 5
+    game.buy(0)
+    assert len(game.bench) == 1
+    assert game.bench[0]["stars"] == 2
+
+
+def test_sell_refunds_pool_and_gold(art, cfg):
+    game = Game(art, cfg, seed=1)
+    game.gold = 100
+    game.shop[0] = "U1_0"
+    before_pool = game.pool.available("U1_0")
+    game.buy(0)
+    gold_after_buy = game.gold
+    game.sell("bench", len(game.bench) - 1)
+    assert game.gold == gold_after_buy + 1
+    assert game.pool.available("U1_0") == before_pool
+
+
+def test_board_cap_is_level(art, cfg):
+    game = Game(art, cfg, seed=1)
+    game.bench = [{"api_name": "U1_0", "stars": 1, "items": []} for _ in range(3)]
+    game.level = 2
+    game.move("bench", 0)
+    game.move("bench", 0)
+    with pytest.raises(InvalidAction, match="board full"):
+        game.move("bench", 0)
+
+
+def test_invalid_actions_raise(art, cfg):
+    game = Game(art, cfg, seed=1)
+    game.gold = 0
+    with pytest.raises(InvalidAction):
+        game.reroll()
+    with pytest.raises(InvalidAction):
+        game.buy_xp()
+    with pytest.raises(InvalidAction):
+        game.sell("bench", 0)