test: add basic test for FastAPI root endpoint

tests/test_main.py

@@ -0,0 +1,19 @@
+import sys
+import os
+import pytest
+from httpx import AsyncClient
+
+# Add the project root directory to the Python path
+sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
+
+from app.main import app  # Import your FastAPI app
+
+@pytest.mark.asyncio
+async def test_read_root():
+    async with AsyncClient(app=app, base_url="http://test") as ac:
+        response = await ac.get("/")
+    assert response.status_code == 200
+    assert response.json() == {"message": "Welcome to the Secure Healthcare Data Pipeline API"}
+
+
+