fix(subscription): process zero-day one-star payment

tests/test_keyboards.py

@@ -256,7 +256,7 @@ class ModeRoutingTests(unittest.IsolatedAsyncioTestCase):
         self.assertEqual(len(message.answers), 1)
         self.assertEqual(message.answers[0][0], "Выберите срок подписки")
         labels = [button.text for row in message.answers[0][1]["reply_markup"].inline_keyboard for button in row]
-        self.assertEqual(labels, ["0 дней — 0 ⭐ (тест)", "1 день — 15 ⭐", "10 дней — 150 ⭐", "30 дней — 450 ⭐"])
+        self.assertEqual(labels, ["0 дней — 1 ⭐", "1 день — 15 ⭐", "10 дней — 150 ⭐", "30 дней — 450 ⭐"])
 
     async def test_subscription_action_button_is_rejected_outside_subscription_mode(self):
         message = _StubMessage(keyboards.RENEW_SUBSCRIPTION_BUTTON)
@@ -278,7 +278,7 @@ class ModeRoutingTests(unittest.IsolatedAsyncioTestCase):
         self.assertEqual(len(message_bot.mock_calls), 2)
         sent = message_bot.mock_calls[-1].args[0]
         self.assertEqual(sent.text, "Выберите срок подписки")
-        self.assertEqual([b.text for row in sent.reply_markup.inline_keyboard for b in row], ["0 дней — 0 ⭐ (тест)", "1 день — 15 ⭐", "10 дней — 150 ⭐", "30 дней — 450 ⭐"])
+        self.assertEqual([b.text for row in sent.reply_markup.inline_keyboard for b in row], ["0 дней — 1 ⭐", "1 день — 15 ⭐", "10 дней — 150 ⭐", "30 дней — 450 ⭐"])
 
     async def test_idea_command_generates_only_in_generation_mode(self):
         message = _StubMessage("/idea")

tests/test_payments.py

@@ -83,6 +83,16 @@ class PreCheckoutTests(unittest.IsolatedAsyncioTestCase):
         await payments.handle_pre_checkout(query)
         query.answer.assert_awaited_once_with(ok=True)
 
+    async def test_accepts_valid_zero_day_one_star_invoice(self):
+        query = self._query(amount=1, payload="sub:0:20261001120000")
+        await payments.handle_pre_checkout(query)
+        query.answer.assert_awaited_once_with(ok=True)
+
+    async def test_rejects_zero_day_invoice_with_wrong_amount(self):
+        query = self._query(amount=0, payload="sub:0:20261001120000")
+        await payments.handle_pre_checkout(query)
+        self.assertFalse(query.answer.await_args.kwargs["ok"])
+
     async def test_rejects_wrong_amount(self):
         query = self._query(amount=1)
         await payments.handle_pre_checkout(query)
@@ -230,13 +240,7 @@ class SubscribeCommandTests(unittest.IsolatedAsyncioTestCase):
         self.assertEqual(markup.inline_keyboard[0][0].text, "🧪 Оплатил (dev, 10 дн.)")
         self.assertEqual(markup.inline_keyboard[0][0].callback_data, "dev_paid:42:10")
 
-    async def test_zero_star_plan_is_present_and_probes_one_star_invoice(self):
-        from pathlib import Path
-        source = Path(bot.__file__).read_text(encoding="utf-8")
-        body = source.split("async def _send_zero_star_invoice")[1].split("\n\nasync def _send_subscription_invoice")[0]
-        self.assertIn("amount=1", body)
-        self.assertNotIn("activate_subscription", body)
-
+    async def test_zero_day_plan_is_present_and_does_not_activate_in_dev_mode(self):
         callback = AsyncMock()
         callback.data = "dev_paid:42:0"
         callback.from_user = SimpleNamespace(id=42)
@@ -248,6 +252,21 @@ class SubscribeCommandTests(unittest.IsolatedAsyncioTestCase):
         to_thread.assert_not_awaited()
         callback.answer.assert_awaited_once_with("Неизвестный срок подписки.", show_alert=True)
 
+    async def test_zero_day_plan_is_a_one_star_invoice_without_access_grant(self):
+        self.assertEqual(payments.plan_for_payload("sub:0:20261001120000"), (0, 1))
+
+        message = _paid_message(amount=1, payload="sub:0:20261001120000")
+        self.db = _db()
+        with (
+            patch.dict(os.environ, {"BOT_DB_PATH": self.db}),
+            patch.object(payments.asyncio, "to_thread", new=_direct_thread_mock()),
+            patch.object(payments, "activate_subscription_days") as activate,
+        ):
+            await payments.handle_successful_payment(message)
+        activate.assert_not_called()
+        self.assertTrue(payments.payment_recorded("charge1", self.db))
+        self.assertIn("Срок подписки не изменён", message.answers[0])
+
     async def test_dev_confirmation_activates_selected_term_and_replies_with_status(self):
         callback = AsyncMock()
         callback.data = "dev_paid:42:10"