Fix test setup for backend

tests/config/database.py

@@ -0,0 +1,20 @@
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+
+from src.database import Base
+
+SQLALCHEMY_DATABASE_URL = "postgresql://admin:WeSign123!@localhost/wesigntest"
+
+engine = create_engine(SQLALCHEMY_DATABASE_URL)
+
+TestSessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+Base.metadata.create_all(bind=engine)
+
+
+def override_get_db():
+    try:
+        db = TestSessionLocal()
+        yield db
+    finally:
+        db.close()