Jest Mock Any Property on Window Utility - with automatic cleanup.
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June 20, 2023 20:00
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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