From 90a1da77a0128b3da1de466669b5509dde862525 Mon Sep 17 00:00:00 2001
From: Ivan Ivashov <IvashovIA@ya.ru>
Date: Sat, 4 Jul 2026 13:04:59 +0300
Subject: [PATCH] YH-2160: add manageLocalStorage tests

---
 .../manageLocalStorage.test.ts                | 88 +++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 src/shared/libs/browser/manageLocalStorage/manageLocalStorage.test.ts

diff --git a/src/shared/libs/browser/manageLocalStorage/manageLocalStorage.test.ts b/src/shared/libs/browser/manageLocalStorage/manageLocalStorage.test.ts
new file mode 100644
index 000000000..367bfb2c5
--- /dev/null
+++ b/src/shared/libs/browser/manageLocalStorage/manageLocalStorage.test.ts
@@ -0,0 +1,88 @@
+import { setToLS, getFromLS, getJSONFromLS, removeFromLS } from './manageLocalStorage';
+
+describe('setToLS', () => {
+	beforeEach(() => {
+		localStorage.clear();
+	});
+
+	test('should save string as is (without JSON.stringify)', () => {
+		const key = 'name';
+		const value = 'Ivan';
+
+		setToLS(key, value);
+		expect(localStorage.getItem(key)).toBe('Ivan');
+	});
+
+	test('should save number as string', () => {
+		const key = 'age';
+		const value = 25;
+
+		setToLS(key, value);
+
+		expect(localStorage.getItem(key)).toBe('25');
+	});
+
+	test('should save object as JSON string', () => {
+		const key = 'user';
+		const value = { name: 'Ivan', age: 30 };
+
+		setToLS(key, value);
+
+		expect(localStorage.getItem(key)).toBe('{"name":"Ivan","age":30}');
+	});
+});
+
+describe('getFromLS', () => {
+	beforeEach(() => {
+		localStorage.clear();
+	});
+	test('must receive the key as a string', () => {
+		const key = 'user';
+		const value = 'Ivan';
+		localStorage.setItem(key, value);
+
+		getFromLS(key);
+
+		expect(localStorage.getItem(key)).toBe('Ivan');
+	});
+});
+
+describe('getJSONFromLS', () => {
+	beforeEach(() => {
+		localStorage.clear();
+	});
+
+	test('returns an object if there is a JSON object in localStorage', () => {
+		const user = { name: 'Ivan', age: 32 };
+		localStorage.setItem('user', JSON.stringify(user));
+
+		expect(getJSONFromLS('user')).toEqual({ name: 'Ivan', age: 32 });
+	});
+
+	test('returns an arr if there is a JSON object in localStorage', () => {
+		const arr = [1, 2, 3];
+		localStorage.setItem('arr', JSON.stringify(arr));
+
+		expect(getJSONFromLS('arr')).toEqual([1, 2, 3]);
+	});
+
+	test('returns null if the key is not in localStorage', () => {
+		expect(getJSONFromLS('non-existent_key')).toBeNull();
+	});
+});
+
+describe('removeFromLS', () => {
+	beforeEach(() => {
+		localStorage.clear();
+	});
+
+	test('remove key', () => {
+		const key = 'user';
+		const age = 32;
+		localStorage.setItem(key, age);
+
+		removeFromLS(key);
+
+		expect(localStorage.getItem(key)).toBeNull();
+	});
+});