fix(game): don't freeze group games when the next player has blackjack

blackjackbot/commands/game/functions.py

@@ -46,11 +46,11 @@ def players_turn(update, context):
     if player.has_blackjack():
         text = (translator("your_cards_are") + "\n\n" + translator("got_blackjack")).format(user_mention, player.cardvalue, player_cards)
         update.effective_message.reply_text(text=text, parse_mode=ParseMode.HTML, reply_markup=None)
-        next_player(update, context)
+        _advance_turn(update, context)
     elif player.cardvalue == 21:
         text = (translator("your_cards_are") + "\n\n" + translator("got_21")).format(user_mention, player.cardvalue, player_cards)
         update.effective_message.reply_text(text=text, parse_mode=ParseMode.HTML, reply_markup=None)
-        next_player(update, context)
+        _advance_turn(update, context)
     else:
         text = translator("your_cards_are").format(user_mention, player.cardvalue, player_cards)
         update.effective_message.reply_text(text=text, parse_mode=ParseMode.HTML, reply_markup=get_game_keyboard(game.id, lang_id))
@@ -65,11 +65,23 @@ def next_player(update, context):
 
     game = GameStore().get_game(chat.id)
 
-    try:
-        if user.id != game.get_current_player().user_id:
-            update.callback_query.answer(translator("mp_not_your_turn_callback").format(user.first_name))
-            return
+    if user.id != game.get_current_player().user_id:
+        update.callback_query.answer(translator("mp_not_your_turn_callback").format(user.first_name))
+        return
+
+    _advance_turn(update, context)
 
+
+def _advance_turn(update, context):
+    """Hand the turn to the next player (or the dealer) without checking who triggered the update.
+    Used when a player's turn ends automatically, e.g. because they were dealt a blackjack."""
+    chat = update.effective_chat
+    lang_id = Database().get_lang_id(chat.id)
+    translator = Translator(lang_id=lang_id)
+
+    game = GameStore().get_game(chat.id)
+
+    try:
         remove_inline_keyboard(update, context)
         game.next_player()
     except NoPlayersLeftException:

blackjackbot/commands/game/tests/functions_test.py

@@ -1,8 +1,10 @@
 # -*- coding: utf-8 -*-
 import unittest
-from unittest.mock import Mock
+from unittest.mock import Mock, patch
 
-from blackjackbot.commands.game.functions import is_button_affiliated
+from blackjack.game import BlackJackGame, Card
+from blackjackbot.commands.game.functions import is_button_affiliated, next_player
+from blackjackbot.gamestore import GameStore
 
 
 class GameCommandsFunctionsTest(unittest.TestCase):
@@ -32,6 +34,38 @@ def test_is_button_affiliated_negative(self):
         self.assertFalse(result)
         update.callback_query.answer.assert_called_once()
 
+    @patch("blackjackbot.commands.util.decorators.Database")
+    @patch("blackjackbot.commands.game.functions.Database")
+    def test_next_player_skips_player_with_blackjack(self, db_mock, decorator_db_mock):
+        """When the next player was dealt a blackjack, their turn must be skipped even though another user triggered the update"""
+        db_mock.return_value.get_lang_id.return_value = "en"
+        decorator_db_mock.return_value.get_lang_id.return_value = "en"
+        chat_id = -1001234
+
+        game = BlackJackGame(gametype=BlackJackGame.Type.MULTIPLAYER_GROUP)
+        game.add_player(1, "A")
+        game.add_player(2, "B")
+        game.add_player(3, "C")
+        game.running = True
+        game.players[0]._cards = [Card(0), Card(1)]  # 2 + 3
+        game.players[1]._cards = [Card(12), Card(9)]  # Ace + Jack -> blackjack
+        game.players[2]._cards = [Card(2), Card(3)]  # 4 + 5
+        game.dealer._cards = [Card(8), Card(7)]
+
+        game_store = GameStore()
+        game_store.add_game(chat_id, game)
+        self.addCleanup(game_store.remove_game, chat_id)
+
+        update = Mock()
+        update.effective_chat.id = chat_id
+        update.effective_user.id = 1  # Player A presses "stand"
+
+        next_player(update, Mock())
+
+        # B was skipped automatically, so it's now C's turn
+        self.assertEqual(game.players[2], game.get_current_player())
+        update.callback_query.answer.assert_not_called()
+
 
 if __name__ == '__main__':
     unittest.main()