Jest Mock Any Property on Window Utility - with automatic cleanup.
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October 25, 2024 13:57
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Jest Mock Any Property on Window Utility - with automatic cleanup
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| export default const mockWindowProperty = (property, value) => { | |
| const { [property]: originalProperty } = window; | |
| delete window[property]; | |
| beforeAll(() => { | |
| Object.defineProperty(window, property, { | |
| configurable: true, | |
| writable: true, | |
| value, | |
| }); | |
| }); | |
| afterAll(() => { | |
| window[property] = originalProperty; | |
| }); | |
| }; | |
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| import mockWindowProperty from './mock-window-property' | |
| describe('my test', () => { | |
| mockWindowProperty('localStorage', { | |
| setItem: jest.fn(), | |
| getItem: jest.fn(), | |
| removeItem: jest.fn(), | |
| }); | |
| it('works as expected', () => { | |
| window.localStorage.setItem('abc'); | |
| expect(window.localStorage.setItem).toHaveBeenCalledWith('abc'); | |
| }); | |
| }); |
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not working for me with node 8