testing

backend/tests/conftest.py

@@ -0,0 +1,41 @@
+"""
+Shared pytest fixtures for all backend tests.
+
+Strategy:
+- Use mongomock to create an in-memory MongoDB per test.
+- Directly set MongoDB.db to the mock database so get_database() returns it.
+- Patch MongoDB.connect_db / close_db so FastAPI's lifespan doesn't try
+  to connect to a real MongoDB server.
+"""
+import pytest
+import mongomock
+from unittest.mock import patch
+from fastapi.testclient import TestClient
+
+
+@pytest.fixture
+def mock_db():
+    """Fresh in-memory MongoDB database for each test."""
+    client = mongomock.MongoClient()
+    return client["test_grateful_journal"]
+
+
+@pytest.fixture
+def client(mock_db):
+    """
+    FastAPI TestClient with MongoDB replaced by an in-memory mock.
+
+    Yields (TestClient, mock_db) so tests can inspect the database directly.
+    """
+    from db import MongoDB
+    from main import app
+
+    with (
+        patch.object(MongoDB, "connect_db"),
+        patch.object(MongoDB, "close_db"),
+    ):
+        MongoDB.db = mock_db
+        with TestClient(app) as c:
+            yield c, mock_db
+
+    MongoDB.db = None