Add comprehensive test suite and utilities for user functionality

This commit introduces a suite of tests for user models, schemas, CRUD operations, and authentication services. It also adds utilities for in-memory database setup to support these tests and updates environment settings for consistency.

backend/app/core/database.py

@@ -1,17 +1,57 @@
+# app/core/database.py
+import logging
 from sqlalchemy import create_engine
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import sessionmaker
+from sqlalchemy.ext.compiler import compiles
+from sqlalchemy.dialects.postgresql import JSONB, UUID
 
 from app.core.config import settings
 
-# Use the database URL from settings
-engine = create_engine(settings.database_url)
-SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+# Configure logging
+logger = logging.getLogger(__name__)
 
+# SQLite compatibility for testing
+@compiles(JSONB, 'sqlite')
+def compile_jsonb_sqlite(type_, compiler, **kw):
+    return "TEXT"
+
+@compiles(UUID, 'sqlite')
+def compile_uuid_sqlite(type_, compiler, **kw):
+    return "TEXT"
+
+# Declarative base for models
 Base = declarative_base()
 
+# Create engine with optimized settings for PostgreSQL
+def create_production_engine():
+    return create_engine(
+        settings.database_url,
+        # Connection pool settings
+        pool_size=settings.db_pool_size,
+        max_overflow=settings.db_max_overflow,
+        pool_timeout=settings.db_pool_timeout,
+        pool_recycle=settings.db_pool_recycle,
+        pool_pre_ping=True,
+        # Query execution settings
+        connect_args={
+            "application_name": "eventspace",
+            "keepalives": 1,
+            "keepalives_idle": 60,
+            "keepalives_interval": 10,
+            "keepalives_count": 5,
+            "options": "-c timezone=UTC",
+        },
+        isolation_level="READ COMMITTED",
+        echo=settings.sql_echo,
+        echo_pool=settings.sql_echo_pool,
+    )
 
-# Dependency to get DB session
+# Default production engine and session factory
+engine = create_production_engine()
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+# FastAPI dependency
 def get_db():
     db = SessionLocal()
     try: