added test for loading json file

test/test_insert_sites.py

@@ -1,7 +1,28 @@
 import inspect
+import json
+import os
 from recipe_graph import insert_sites
 from sqlalchemy import select
 from sqlalchemy.exc import SQLAlchemyError
 import sqlalchemy
 
 import pytest
+
+
+@pytest.fixture
+def json_data() -> list[dict]:
+    return [{"key": "value"}, {"test": "value1", "test2": "value2"}]
+
+
+@pytest.fixture
+def json_file(json_data: list[dict]) -> str:
+    f_path = "test.json"
+    with open(f_path, 'w') as f:
+        json.dump(json_data, f)
+    yield f_path
+    if os.path.exists(f_path):
+        os.remove(f_path)
+
+def test_load_file(json_file: str, json_data):
+    test_data = insert_sites.load_file(json_file)
+    assert test_data == json_data