removeFromLocalStorage

1/**
2 * Removes an item from localStorage by key.
3 *
4 * @param key - The key of the item to remove.
5 */
6export function removeFromLocalStorage(key: string): void {
7  try {
8    localStorage.removeItem(key);
9  } catch (e) {
10    console.error('Failed to remove from localStorage:', e);
11  }
12}

1beforeEach(() => {
2  localStorage.clear();
3  jest.clearAllMocks();
4});
5
6test('removeFromLocalStorage - removes existing key', () => {
7  localStorage.setItem('token', '123');
8  removeFromLocalStorage('token');
9  expect(localStorage.getItem('token')).toBeNull();
10});
11
12test('removeFromLocalStorage - handles non-existing key', () => {
13  expect(() => removeFromLocalStorage('nonexistent')).not.toThrow();
14});
15
16test('removeFromLocalStorage - logs error on failure', () => {
17  const spy = jest.spyOn(console, 'error').mockImplementation(() => {});
18  const originalRemoveItem = localStorage.removeItem;
19  // Simulate error
20  Object.defineProperty(localStorage, 'removeItem', {
21    value: () => { throw new Error('Failure'); }
22  });
23
24  removeFromLocalStorage('key');
25  expect(console.error).toHaveBeenCalled();
26
27  // Restore original
28  Object.defineProperty(localStorage, 'removeItem', {
29    value: originalRemoveItem
30  });
31});