sql first refactor

backend/tests/test_db_json_fetch_json.py

@@ -0,0 +1,28 @@
+"""Smoke: fetch_json toleruje dict z asyncpg (bez reálné DB)."""
+
+from __future__ import annotations
+
+import asyncio
+from unittest.mock import AsyncMock
+
+from app.db_json import fetch_json
+
+
+def test_fetch_json_returns_dict() -> None:
+    async def _run() -> None:
+        conn = AsyncMock()
+        conn.fetchval = AsyncMock(return_value={"a": 1})
+        out = await fetch_json(conn, "select ems.fn_x()", 1)
+        assert out == {"a": 1}
+
+    asyncio.run(_run())
+
+
+def test_fetch_json_parses_str() -> None:
+    async def _run() -> None:
+        conn = AsyncMock()
+        conn.fetchval = AsyncMock(return_value='{"b": 2}')
+        out = await fetch_json(conn, "select 1")
+        assert out == {"b": 2}
+
+    asyncio.run(_run())