test: shufleArr function

client/tests/unit/shuffleArr.spec.ts

@@ -0,0 +1,23 @@
+import { shuffleArray } from '@/utils';
+
+describe('Utils - /src/utils/index.ts', () => {
+  describe('#shuffleArr', () => {
+    it('should not change array', () => {
+      const arr = [1];
+
+      expect(shuffleArray(arr)).toStrictEqual(arr);
+    });
+
+    it('should have correct length', () => {
+      const arr = 'the quick brown fox jumps over the lazy dog'.split(' ');
+
+      expect(shuffleArray(arr).length).toEqual(9);
+    });
+
+    it('should return an array', () => {
+      const arr = 'the quick brown fox jumps over the lazy dog'.split(' ');
+
+      expect(Array.isArray(shuffleArray(arr))).toEqual(true);
+    });
+  });
+});