fix: backend improvements (customer health, tests, middleware, corpus)

backend/tests/conftest.py

@@ -4,6 +4,7 @@ from typing import AsyncGenerator
 from httpx import AsyncClient, ASGITransport
 from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine
 from sqlalchemy.orm import sessionmaker
+from sqlalchemy.pool import NullPool
 import sys
 import os
 
@@ -93,11 +94,43 @@ from app.main import app
 from app.database import Base, get_db
 from app.models.user import User
 from app.core.security import hash_password
+from app.core.middleware import get_redis as real_get_redis
+
+
+class _MockRedis:
+    """In-memory mock Redis for testing — avoids real Redis connections."""
+    def __init__(self):
+        self._store = {}
+    async def get(self, key):
+        return self._store.get(key)
+    async def setex(self, key, time, value):
+        self._store[key] = value
+    async def incr(self, key):
+        val = self._store.get(key, 0) + 1
+        self._store[key] = val
+        return val
+    async def expire(self, key, ttl):
+        pass
+    async def close(self):
+        pass
+
+
+@pytest.fixture(scope="function", autouse=True)
+def _mock_redis():
+    import app.core.middleware as mw_mod
+    mock = _MockRedis()
+
+    async def _mock_get_redis():
+        return mock
+
+    mw_mod.get_redis = _mock_get_redis
+    yield
+    mw_mod.get_redis = real_get_redis
 
 
 TEST_DATABASE_URL = "postgresql+asyncpg://admin:dWFNi67nHNbPbjmP@localhost:5432/foreign_trade_test"
 
-test_engine = create_async_engine(TEST_DATABASE_URL, echo=False)
+test_engine = create_async_engine(TEST_DATABASE_URL, echo=False, poolclass=NullPool)
 TestAsyncSessionLocal = sessionmaker(
     test_engine,
     class_=AsyncSession,
@@ -151,6 +184,11 @@ async def test_user(db_session: AsyncSession) -> User:
     db_session.add(user)
     await db_session.commit()
     await db_session.refresh(user)
+
+    # Grant credits for tests that require paid actions (marketing, reply, translation)
+    from app.services.credit import CreditService
+    credit_svc = CreditService(db_session)
+    await credit_svc.add_credits(str(user.id), 1000, "test_setup", "Test credits")
     return user