fix: extra frontend tests

frontend/tests/utils/array-utils.test.ts

@@ -0,0 +1,50 @@
+import {copyArrayWith} from "../../src/utils/array-utils";
+import { describe, it, expect } from "vitest";
+
+describe('copyArrayWith', () => {
+    it('should replace the element at the specified index', () => {
+        const original = [1, 2, 3, 4];
+        const result = copyArrayWith(2, 99, original);
+        expect(result).toEqual([1, 2, 99, 4]);
+    });
+
+    it('should not modify the original array', () => {
+        const original = ['a', 'b', 'c'];
+        const result = copyArrayWith(1, 'x', original);
+        expect(original).toEqual(['a', 'b', 'c']); // Original remains unchanged
+        expect(result).toEqual(['a', 'x', 'c']);
+    });
+
+    it('should handle replacing the first element', () => {
+        const original = [true, false, true];
+        const result = copyArrayWith(0, false, original);
+        expect(result).toEqual([false, false, true]);
+    });
+
+    it('should handle replacing the last element', () => {
+        const original = ['apple', 'banana', 'cherry'];
+        const result = copyArrayWith(2, 'date', original);
+        expect(result).toEqual(['apple', 'banana', 'date']);
+    });
+
+    it('should work with complex objects', () => {
+        const original = [{ id: 1 }, { id: 2 }, { id: 3 }];
+        const newValue = { id: 99 };
+        const result = copyArrayWith(1, newValue, original);
+        expect(result).toEqual([{ id: 1 }, { id: 99 }, { id: 3 }]);
+        expect(original[1].id).toBe(2); // Original remains unchanged
+    });
+
+
+    it('should allow setting to undefined', () => {
+        const original = [1, 2, 3];
+        const result = copyArrayWith(1, undefined, original);
+        expect(result).toEqual([1, undefined, 3]);
+    });
+
+    it('should allow setting to null', () => {
+        const original = [1, 2, 3];
+        const result = copyArrayWith(1, null, original);
+        expect(result).toEqual([1, null, 3]);
+    });
+});