feat: Phase 3 Tasks 16-18 — Pydantic-Settings, Error-Handler, systemd

tests/test_config.py

@@ -0,0 +1,51 @@
+"""Test für src.config — Pydantic-Settings Konfiguration."""
+
+from __future__ import annotations
+
+import os
+from unittest.mock import patch
+
+import pytest
+
+from src.config import Settings, settings
+
+
+class TestSettings:
+    """Tests für die zentrale Settings-Klasse."""
+
+    @patch.dict(os.environ, {"REDIS_HOST": "redis.example.com", "REDIS_PORT": "6380"})
+    def test_settings_liest_env_vars(self) -> None:
+        class EnvSettings(Settings):
+            model_config = {"env_file": None}
+
+        env = EnvSettings()
+        assert env.REDIS_HOST == "redis.example.com"
+        assert env.REDIS_PORT == 6380
+
+    def test_settings_standardwerte(self) -> None:
+        """Standardwerte ohne Umgebungsvariablen."""
+
+        class EnvSettings(Settings):
+            model_config = {"env_file": None}
+
+        env = EnvSettings()
+        assert env.REDIS_HOST == "localhost"
+        assert env.REDIS_PORT == 6379
+        assert env.APP_HOST == "0.0.0.0"
+        assert env.APP_PORT == 5002
+        assert env.APP_DEBUG is False
+
+    def test_settings_falsches_redis_port_wirft(self) -> None:
+        """Ungültiger Port-Typ wirft ValidationError."""
+        with pytest.raises(Exception):  # type: ignore[misc]
+            with patch.dict(os.environ, {"REDIS_PORT": "nicht_zahl"}, clear=True):
+                Settings._build_customise_schema()
+                Settings.model_rebuild(force=True)
+                env = Settings(model_config={"env_file": None})
+                _ = env.REDIS_PORT  # noqa: B018
+
+    def test_settings_globale_instance(self) -> None:
+        """globale settings-Instanz ist vom Typ Settings."""
+        assert isinstance(settings, Settings)
+        assert settings.REDIS_HOST == "localhost"
+        assert settings.APP_PORT == 5002