saveToSessionStorage

1/**
2 * Saves a value to sessionStorage after serializing it to JSON.
3 *
4 * @param key - The key under which the value will be stored.
5 * @param value - The value to store (will be JSON-stringified).
6 */
7export function saveToSessionStorage<T>(key: string, value: T): void {
8  try {
9    const serialized = JSON.stringify(value);
10    sessionStorage.setItem(key, serialized);
11  } catch (e) {
12    console.error('Failed to save to sessionStorage:', e);
13  }
14}

1beforeEach(() => {
2  sessionStorage.clear();
3  jest.clearAllMocks();
4});
5
6test('saveToSessionStorage - stores stringified value', () => {
7  saveToSessionStorage('user', { name: 'Alice' });
8  expect(sessionStorage.getItem('user')).toBe(JSON.stringify({ name: 'Alice' }));
9});
10
11test('saveToSessionStorage - handles primitive values', () => {
12  saveToSessionStorage('count', 5);
13  expect(sessionStorage.getItem('count')).toBe('5');
14});
15
16test('saveToSessionStorage - catches errors gracefully', () => {
17  const circular: any = {};
18  circular.self = circular;
19  const spy = jest.spyOn(console, 'error').mockImplementation(() => {});
20  saveToSessionStorage('bad', circular);
21  expect(console.error).toHaveBeenCalled();
22});