test: lock down application and agent contracts

tests/test_application.py

@@ -0,0 +1,65 @@
+import tempfile
+import unittest
+from pathlib import Path
+from unittest.mock import Mock, patch
+from zoneinfo import ZoneInfo
+
+from assistant_bot import application as application_module
+from assistant_bot.auth import authentication_guard
+from assistant_bot.handlers import (
+    ask_command,
+    help_command,
+    history_command,
+    inline_query,
+    model_command,
+    models_command,
+    new_conversation_command,
+    private_text,
+    private_voice,
+    start,
+)
+
+
+class ApplicationRegistrationTests(unittest.TestCase):
+    def test_registers_the_current_public_handlers_in_order(self) -> None:
+        with tempfile.TemporaryDirectory() as directory, patch.multiple(
+            application_module,
+            get_assistant_password=Mock(return_value="secret"),
+            get_bot_token=Mock(return_value="123456:TEST"),
+            get_db_path=Mock(
+                return_value=Path(directory) / "assistant.sqlite3"
+            ),
+            get_assistant_mode=Mock(return_value="local"),
+            get_ollama_base_url=Mock(return_value="http://localhost:11434"),
+            get_whisper_model=Mock(return_value="small"),
+            get_whisper_device=Mock(return_value="cpu"),
+            get_whisper_compute_type=Mock(return_value="int8"),
+            get_whisper_language=Mock(return_value="ru"),
+            get_local_timezone=Mock(return_value=ZoneInfo("UTC")),
+            get_voice_max_duration_seconds=Mock(return_value=120),
+        ):
+            application = application_module.create_application()
+
+        self.assertEqual(
+            [handler.callback for handler in application.handlers[-1]],
+            [authentication_guard],
+        )
+        self.assertEqual(
+            [handler.callback for handler in application.handlers[0]],
+            [
+                start,
+                help_command,
+                ask_command,
+                models_command,
+                model_command,
+                new_conversation_command,
+                history_command,
+                inline_query,
+                private_voice,
+                private_text,
+            ],
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()