29 lines
864 B
JavaScript
29 lines
864 B
JavaScript
import { useLocalStorageSpy } from './local_storage_helper';
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describe('block before helper is installed', () => {
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it('should leave original localStorage intact', () => {
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expect(localStorage.getItem).toEqual(expect.any(Function));
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expect(jest.isMockFunction(localStorage.getItem)).toBe(false);
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});
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});
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describe('localStorage helper', () => {
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useLocalStorageSpy();
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it('mocks localStorage but works exactly like original localStorage', () => {
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localStorage.setItem('test', 'testing');
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localStorage.setItem('test2', 'testing');
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expect(localStorage.getItem('test')).toBe('testing');
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localStorage.removeItem('test', 'testing');
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expect(localStorage.getItem('test')).toBe(null);
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expect(localStorage.getItem('test2')).toBe('testing');
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localStorage.clear();
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expect(localStorage.getItem('test2')).toBe(null);
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});
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});
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