advancements in tests

back/utils/array.ts

@@ -7,3 +7,10 @@ export function removeDuplicates(array: []) {
     }
     return unique;
 }
+
+export function hasSameElements(a1: any[], a2: any[]) {
+    return (
+        a1.length == a2.length &&
+        a1.reduce((a, b) => a && a2.includes(b), true)
+    );
+}