Refresh web UI and make ML imports optional

tests/test_dev_rules.py

@@ -0,0 +1,51 @@
+from __future__ import annotations
+
+import pytest
+
+from catan.data import DevelopmentCard
+from catan.game import Game, GameConfig, Phase
+
+
+def _prepare_turn(game: Game) -> None:
+    game.phase = Phase.MAIN
+    game.has_rolled = True
+    game.robber_move_required = False
+    game.pending_discards.clear()
+
+
+def _other_hex(game: Game, exclude: int) -> int:
+    return next(h for h in game.board.hexes if h != exclude)
+
+
+def test_only_one_dev_card_per_turn() -> None:
+    game = Game(GameConfig(player_names=["A", "B", "C", "D"]))
+    _prepare_turn(game)
+    player = game.current_player
+    player.dev_cards = [DevelopmentCard.KNIGHT, DevelopmentCard.KNIGHT]
+    player.new_dev_cards.clear()
+
+    first_target = _other_hex(game, game.board.robber_hex)
+    game.play_knight(first_target, None)
+
+    second_target = _other_hex(game, first_target)
+    with pytest.raises(ValueError, match="development card"):
+        game.play_knight(second_target, None)
+
+
+def test_dev_card_limit_resets_next_turn() -> None:
+    game = Game(GameConfig(player_names=["A", "B", "C", "D"]))
+    _prepare_turn(game)
+    player = game.current_player
+    player.dev_cards = [DevelopmentCard.KNIGHT]
+    player.new_dev_cards.clear()
+    target_hex = _other_hex(game, game.board.robber_hex)
+    game.play_knight(target_hex, None)
+    game.end_turn()
+
+    _prepare_turn(game)
+    next_player = game.current_player
+    next_player.dev_cards = [DevelopmentCard.KNIGHT]
+    next_player.new_dev_cards.clear()
+    next_target = _other_hex(game, game.board.robber_hex)
+    # Should not raise now that it's a new turn.
+    game.play_knight(next_target, None)