style: apply ruff formatting to source and test files

app/application/use_cases/create_post.py

@@ -27,9 +27,7 @@ class CreatePostUseCase:
 
         # Check if slug already exists
         if await self._post_repo.slug_exists(slug.value):
-            raise AlreadyExistsException(
-                f"Post with slug '{slug.value}' already exists"
-            )
+            raise AlreadyExistsException(f"Post with slug '{slug.value}' already exists")
 
         # Create domain entity
         post = Post.create(

app/application/use_cases/list_posts.py

@@ -38,9 +38,7 @@ class ListPostsUseCase:
         offset: int | None = None,
     ) -> list[PostResponseDTO]:
         """Get posts by author."""
-        posts = await self._post_repo.get_by_author(
-            author_id, limit=limit, offset=offset
-        )
+        posts = await self._post_repo.get_by_author(author_id, limit=limit, offset=offset)
         return [self._map_to_dto(post) for post in posts]
 
     async def by_tag(

app/domain/entities/base.py

@@ -2,7 +2,7 @@
 
 from abc import ABC, abstractmethod
 from dataclasses import dataclass, field
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 from typing import Any
 from uuid import UUID, uuid4
 
@@ -12,8 +12,8 @@ class BaseEntity(ABC):
     """Base class for all domain entities."""
 
     id: UUID = field(default_factory=uuid4)
-    created_at: datetime = field(default_factory=lambda: datetime.now(timezone.utc))
-    updated_at: datetime = field(default_factory=lambda: datetime.now(timezone.utc))
+    created_at: datetime = field(default_factory=lambda: datetime.now(UTC))
+    updated_at: datetime = field(default_factory=lambda: datetime.now(UTC))
 
     def __eq__(self, other: object) -> bool:
         if not isinstance(other, BaseEntity):
@@ -25,7 +25,7 @@ class BaseEntity(ABC):
 
     def touch(self) -> None:
         """Update the updated_at timestamp."""
-        self.updated_at = datetime.now(timezone.utc)
+        self.updated_at = datetime.now(UTC)
 
     @abstractmethod
     def to_dict(self) -> dict[str, Any]:

app/domain/roles.py

@@ -1,8 +1,9 @@
 """Role-based access control definitions."""
 
+from collections.abc import Callable
 from enum import Enum
 from functools import wraps
-from typing import Any, Callable
+from typing import Any
 
 from app.domain.exceptions import ForbiddenException
 

app/domain/value_objects/slug.py

@@ -19,9 +19,7 @@ class Slug(ValueObject[str]):
         if len(self.value) > self.MAX_LENGTH:
             raise ValueError(f"Slug must be at most {self.MAX_LENGTH} characters")
         if not re.match(self.SLUG_PATTERN, self.value):
-            raise ValueError(
-                "Slug must contain only lowercase letters, numbers, and hyphens"
-            )
+            raise ValueError("Slug must contain only lowercase letters, numbers, and hyphens")
 
     @classmethod
     def from_title(cls, title: str) -> "Slug":

app/infrastructure/database/connection.py

@@ -1,7 +1,7 @@
 """Database connection and session management."""
 
+from collections.abc import AsyncGenerator
 from contextlib import asynccontextmanager
-from typing import AsyncGenerator
 
 from sqlalchemy.ext.asyncio import (
     AsyncEngine,
@@ -38,7 +38,7 @@ AsyncSessionLocal = async_sessionmaker(
 )
 
 
-async def get_session() -> AsyncGenerator[AsyncSession, None]:
+async def get_session() -> AsyncGenerator[AsyncSession]:
     """Get database session."""
     async with AsyncSessionLocal() as session:
         try:
@@ -48,7 +48,7 @@ async def get_session() -> AsyncGenerator[AsyncSession, None]:
 
 
 @asynccontextmanager
-async def get_session_context() -> AsyncGenerator[AsyncSession, None]:
+async def get_session_context() -> AsyncGenerator[AsyncSession]:
     """Get database session as context manager."""
     async with AsyncSessionLocal() as session:
         try:

app/infrastructure/database/models.py

@@ -1,6 +1,6 @@
 """SQLAlchemy ORM models."""
 
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 from uuid import uuid4
 
 from sqlalchemy import JSON, Boolean, DateTime, String, Text
@@ -14,27 +14,21 @@ class PostORM(Base):  # type: ignore[valid-type,misc]
 
     __tablename__ = "posts"
 
-    id: Mapped[str] = mapped_column(
-        String(36), primary_key=True, default=lambda: str(uuid4())
-    )
+    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid4()))
     title: Mapped[str] = mapped_column(String(200), nullable=False)
     content: Mapped[str] = mapped_column(Text, nullable=False)
-    slug: Mapped[str] = mapped_column(
-        String(200), nullable=False, unique=True, index=True
-    )
+    slug: Mapped[str] = mapped_column(String(200), nullable=False, unique=True, index=True)
     author_id: Mapped[str] = mapped_column(String(100), nullable=False, index=True)
-    published: Mapped[bool] = mapped_column(
-        Boolean, default=False, nullable=False, index=True
-    )
+    published: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False, index=True)
     tags: Mapped[list[str]] = mapped_column(JSON, default=list)
     created_at: Mapped[datetime] = mapped_column(
         DateTime(timezone=True),
-        default=lambda: datetime.now(timezone.utc),
+        default=lambda: datetime.now(UTC),
         nullable=False,
     )
     updated_at: Mapped[datetime] = mapped_column(
         DateTime(timezone=True),
-        default=lambda: datetime.now(timezone.utc),
-        onupdate=lambda: datetime.now(timezone.utc),
+        default=lambda: datetime.now(UTC),
+        onupdate=lambda: datetime.now(UTC),
         nullable=False,
     )

app/infrastructure/di/providers.py

@@ -1,6 +1,6 @@
 """Dishka providers for dependency injection."""
 
-from typing import AsyncGenerator
+from collections.abc import AsyncGenerator
 
 from dishka import Provider, Scope, provide
 from sqlalchemy.ext.asyncio import AsyncEngine, AsyncSession
@@ -30,7 +30,7 @@ class DatabaseProvider(Provider):
         return engine
 
     @provide(scope=Scope.REQUEST)
-    async def get_session(self) -> AsyncGenerator[AsyncSession, None]:
+    async def get_session(self) -> AsyncGenerator[AsyncSession]:
         """Provide database session per request."""
         async with AsyncSessionLocal() as session:
             try:

app/infrastructure/middleware/error_handler.py

@@ -1,6 +1,6 @@
 """Exception handling middleware."""
 
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 
 from fastapi import FastAPI, Request
 from fastapi.responses import JSONResponse
@@ -33,9 +33,7 @@ def get_status_code(exc: DomainException) -> int:
             return 500
 
 
-async def domain_exception_handler(
-    request: Request, exc: DomainException
-) -> JSONResponse:
+async def domain_exception_handler(request: Request, exc: DomainException) -> JSONResponse:
     """Handle domain exceptions."""
     status_code = get_status_code(exc)
     return JSONResponse(
@@ -43,22 +41,20 @@ async def domain_exception_handler(
         content={
             "error": exc.__class__.__name__,
             "message": exc.message,
-            "timestamp": datetime.now(timezone.utc).isoformat(),
+            "timestamp": datetime.now(UTC).isoformat(),
             "path": str(request.url.path),
         },
     )
 
 
-async def http_exception_handler(
-    request: Request, exc: StarletteHTTPException
-) -> JSONResponse:
+async def http_exception_handler(request: Request, exc: StarletteHTTPException) -> JSONResponse:
     """Handle HTTP exceptions."""
     return JSONResponse(
         status_code=exc.status_code,
         content={
             "error": "HTTPException",
             "message": str(exc.detail),
-            "timestamp": datetime.now(timezone.utc).isoformat(),
+            "timestamp": datetime.now(UTC).isoformat(),
             "path": str(request.url.path),
         },
     )
@@ -71,7 +67,7 @@ async def generic_exception_handler(request: Request, exc: Exception) -> JSONRes
         content={
             "error": "InternalServerError",
             "message": "An unexpected error occurred",
-            "timestamp": datetime.now(timezone.utc).isoformat(),
+            "timestamp": datetime.now(UTC).isoformat(),
             "path": str(request.url.path),
         },
     )

app/infrastructure/repositories/post.py

@@ -47,9 +47,7 @@ class SQLAlchemyPostRepository(PostRepository):
 
     async def get_by_id(self, entity_id: UUID) -> Post | None:
         """Get post by ID."""
-        result = await self._session.execute(
-            select(PostORM).where(PostORM.id == str(entity_id))
-        )
+        result = await self._session.execute(select(PostORM).where(PostORM.id == str(entity_id)))
         orm = result.scalar_one_or_none()
         return self._to_domain(orm) if orm else None
 
@@ -67,9 +65,7 @@ class SQLAlchemyPostRepository(PostRepository):
 
     async def update(self, entity: Post) -> None:
         """Update existing post."""
-        result = await self._session.execute(
-            select(PostORM).where(PostORM.id == str(entity.id))
-        )
+        result = await self._session.execute(select(PostORM).where(PostORM.id == str(entity.id)))
         orm = result.scalar_one()
 
         orm.title = entity.title.value
@@ -83,25 +79,19 @@ class SQLAlchemyPostRepository(PostRepository):
 
     async def delete(self, entity_id: UUID) -> None:
         """Delete post by ID."""
-        result = await self._session.execute(
-            select(PostORM).where(PostORM.id == str(entity_id))
-        )
+        result = await self._session.execute(select(PostORM).where(PostORM.id == str(entity_id)))
         orm = result.scalar_one_or_none()
         if orm:
             await self._session.delete(orm)
 
     async def exists(self, entity_id: UUID) -> bool:
         """Check if post exists."""
-        result = await self._session.execute(
-            select(PostORM).where(PostORM.id == str(entity_id))
-        )
+        result = await self._session.execute(select(PostORM).where(PostORM.id == str(entity_id)))
         return result.scalar_one_or_none() is not None
 
     async def get_by_slug(self, slug: str) -> Post | None:
         """Get post by slug."""
-        result = await self._session.execute(
-            select(PostORM).where(PostORM.slug == slug)
-        )
+        result = await self._session.execute(select(PostORM).where(PostORM.slug == slug))
         orm = result.scalar_one_or_none()
         return self._to_domain(orm) if orm else None
 
@@ -154,9 +144,7 @@ class SQLAlchemyPostRepository(PostRepository):
 
     async def slug_exists(self, slug: str) -> bool:
         """Check if slug exists."""
-        result = await self._session.execute(
-            select(PostORM).where(PostORM.slug == slug)
-        )
+        result = await self._session.execute(select(PostORM).where(PostORM.slug == slug))
         return result.scalar_one_or_none() is not None
 
     async def search(

app/main.py

@@ -1,7 +1,7 @@
 """Application entry point with DDD architecture."""
 
+from collections.abc import AsyncGenerator
 from contextlib import asynccontextmanager
-from typing import AsyncGenerator
 
 import uvicorn
 from dishka import make_async_container
@@ -21,7 +21,7 @@ from app.presentation import router
 
 
 @asynccontextmanager
-async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
+async def lifespan(app: FastAPI) -> AsyncGenerator[None]:
     """Application lifespan manager."""
     # Startup
     await init_db()

tests/api/conftest.py

@@ -1,6 +1,6 @@
 """API test fixtures."""
 
-from typing import AsyncGenerator
+from collections.abc import AsyncGenerator
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
@@ -25,7 +25,7 @@ def mock_keycloak_client() -> MagicMock:
 
 
 @pytest.fixture
-async def client(mock_keycloak_client: MagicMock) -> AsyncGenerator[AsyncClient, None]:
+async def client(mock_keycloak_client: MagicMock) -> AsyncGenerator[AsyncClient]:
     """Create async HTTP client for API testing."""
     with patch(
         "app.presentation.api.deps.KeycloakAuthClient",

tests/e2e/conftest.py

@@ -1,14 +1,14 @@
 # E2E test fixtures
 # Provides: full application state, end-to-end workflows, cleanup
 
-from typing import AsyncGenerator
+from collections.abc import AsyncGenerator
 
 import pytest
 from fastapi import FastAPI
 
 
 @pytest.fixture
-async def e2e_app() -> AsyncGenerator[FastAPI, None]:
+async def e2e_app() -> AsyncGenerator[FastAPI]:
     """Create full application instance for E2E testing."""
     from app.main import app_factory
 

tests/integration/conftest.py

@@ -1,6 +1,6 @@
 """Integration test fixtures."""
 
-from typing import AsyncGenerator
+from collections.abc import AsyncGenerator
 
 import pytest
 from sqlalchemy.ext.asyncio import (
@@ -39,7 +39,7 @@ def session_factory(engine: AsyncEngine) -> async_sessionmaker[AsyncSession]:
 
 
 @pytest.fixture(autouse=True)
-async def setup_db(engine: AsyncEngine) -> AsyncGenerator[None, None]:
+async def setup_db(engine: AsyncEngine) -> AsyncGenerator[None]:
     """Setup database tables for each test."""
     async with engine.begin() as conn:
         await conn.run_sync(Base.metadata.create_all)
@@ -51,7 +51,7 @@ async def setup_db(engine: AsyncEngine) -> AsyncGenerator[None, None]:
 @pytest.fixture
 async def db_session(
     session_factory: async_sessionmaker[AsyncSession],
-) -> AsyncGenerator[AsyncSession, None]:
+) -> AsyncGenerator[AsyncSession]:
     """Create database session for testing."""
     async with session_factory() as session:
         yield session

tests/unit/infrastructure/test_auth.py

@@ -123,9 +123,7 @@ class TestKeycloakAuthClient:
         """Create Keycloak client."""
         return KeycloakAuthClient(settings)
 
-    def test_client_initialization(
-        self, client: KeycloakAuthClient, settings: Settings
-    ) -> None:
+    def test_client_initialization(self, client: KeycloakAuthClient, settings: Settings) -> None:
         """Test client initialization."""
         assert client._settings == settings
         assert client._base_url == "http://localhost:8080/realms/test-realm"
@@ -144,10 +142,7 @@ class TestKeycloakAuthClient:
     def test_get_userinfo_url(self, client: KeycloakAuthClient) -> None:
         """Test userinfo URL generation."""
         url = client._get_userinfo_url()
-        assert (
-            url
-            == "http://localhost:8080/realms/test-realm/protocol/openid-connect/userinfo"
-        )
+        assert url == "http://localhost:8080/realms/test-realm/protocol/openid-connect/userinfo"
 
     @pytest.mark.asyncio
     async def test_introspect_token_success(self, client: KeycloakAuthClient) -> None:
@@ -196,18 +191,14 @@ class TestKeycloakAuthClient:
         assert result.is_valid is False
 
     @pytest.mark.asyncio
-    async def test_introspect_token_http_error(
-        self, client: KeycloakAuthClient
-    ) -> None:
+    async def test_introspect_token_http_error(self, client: KeycloakAuthClient) -> None:
         """Test introspection with HTTP error."""
         import httpx
 
         mock_async_client = AsyncMock()
         mock_async_client.__aenter__ = AsyncMock(return_value=mock_async_client)
         mock_async_client.__aexit__ = AsyncMock(return_value=None)
-        mock_async_client.post = AsyncMock(
-            side_effect=httpx.HTTPError("Connection error")
-        )
+        mock_async_client.post = AsyncMock(side_effect=httpx.HTTPError("Connection error"))
 
         with patch("httpx.AsyncClient", return_value=mock_async_client):
             result = await client.introspect_token("test-token")
@@ -216,9 +207,7 @@ class TestKeycloakAuthClient:
         assert result.is_valid is False
 
     @pytest.mark.asyncio
-    async def test_introspect_token_uses_cache(
-        self, client: KeycloakAuthClient
-    ) -> None:
+    async def test_introspect_token_uses_cache(self, client: KeycloakAuthClient) -> None:
         """Test that token introspection uses cache."""
         mock_response = Mock()
         mock_response.json.return_value = {
@@ -283,9 +272,7 @@ class TestKeycloakAuthClient:
         mock_async_client = AsyncMock()
         mock_async_client.__aenter__ = AsyncMock(return_value=mock_async_client)
         mock_async_client.__aexit__ = AsyncMock(return_value=None)
-        mock_async_client.get = AsyncMock(
-            side_effect=httpx.HTTPError("Connection error")
-        )
+        mock_async_client.get = AsyncMock(side_effect=httpx.HTTPError("Connection error"))
 
         with patch("httpx.AsyncClient", return_value=mock_async_client):
             result = await client.get_userinfo("test-token")
@@ -293,9 +280,7 @@ class TestKeycloakAuthClient:
         assert result is None
 
     @pytest.mark.asyncio
-    async def test_introspect_token_no_realm_roles(
-        self, client: KeycloakAuthClient
-    ) -> None:
+    async def test_introspect_token_no_realm_roles(self, client: KeycloakAuthClient) -> None:
         """Test introspection without realm_access roles."""
         mock_response = Mock()
         mock_response.json.return_value = {

tests/unit/infrastructure/test_config.py

@@ -129,10 +129,7 @@ class TestSettings:
             security=SecurityConfig(secret_key="test"),
             kc=KCConfig(client_secret="test"),
         )
-        assert (
-            s.database_url
-            == "postgresql+asyncpg://admin:secret@db.example.com:5433/mydb"
-        )
+        assert s.database_url == "postgresql+asyncpg://admin:secret@db.example.com:5433/mydb"
 
     def test_database_url_override(self) -> None:
         """Test that explicit database URL overrides auto-building."""