fix: add missing fixtures and improve test model constructor

- Add oauth_db_session fixture for OAuth tests
- Add simple_user fixture for test data
- Fix TestModel constructor to avoid pytest warning
- Improve test isolation and cleanup

tests/auth/test_oauth.py

@@ -246,6 +246,44 @@ with (
 # Импортируем необходимые модели
 from orm.community import Community, CommunityAuthor
 
+@pytest.fixture
+def oauth_db_session():
+    """Фикстура для сессии базы данных в OAuth тестах"""
+    from services.db import local_session
+    session = local_session()
+    try:
+        yield session
+    finally:
+        session.close()
+
+@pytest.fixture
+def simple_user(oauth_db_session):
+    """Фикстура для простого пользователя"""
+    from auth.orm import Author
+    import time
+    
+    # Создаем тестового пользователя
+    user = Author(
+        email="simple@test.com",
+        name="Simple User",
+        slug="simple-user",
+        email_verified=True,
+        created_at=int(time.time()),
+        updated_at=int(time.time()),
+        last_seen=int(time.time())
+    )
+    oauth_db_session.add(user)
+    oauth_db_session.commit()
+    
+    yield user
+    
+    # Очистка
+    try:
+        oauth_db_session.query(Author).where(Author.id == user.id).delete()
+        oauth_db_session.commit()
+    except Exception:
+        oauth_db_session.rollback()
+
 @pytest.fixture
 def test_community(oauth_db_session, simple_user):
     """

tests/test_db_coverage.py

@@ -19,6 +19,10 @@ class TestModel(Base):
     name = Column(String)
     description = Column(String, nullable=True)
     
+    def __init__(self, name: str = None, description: str = None):
+        self.name = name
+        self.description = description
+
 class TestDatabaseFunctions:
     """Тесты для функций работы с базой данных"""