Basic setup of the project.

scripts/jest.setup.js

@@ -0,0 +1,17 @@
+// jest.setup.js
+const getCircularReplacer = () => {
+    const seen = new WeakSet();
+    return (key, value) => {
+        if (typeof value === 'object' && value !== null) {
+            if (seen.has(value)) {
+                return;
+            }
+            seen.add(value);
+        }
+        return value;
+    };
+};
+
+global.customJSONStringify = (object) => {
+    return JSON.stringify(object, getCircularReplacer());
+};