andreivasilache
/ is.js
Created
April 18, 2022 09:41
Utility used in order to avoid ugly nested ternary statements. (Idea: https://medium.com/fractions/3-more-marvelous-javascript-tips-to-skyrocket-your-productivity-ba75f72b0195)
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| const is = (val) => ({ | |
| if: (expr) => { | |
| if (expr) | |
| return { | |
| else: () => val, | |
| is: function is() { | |
| return { | |
| if: () => ({ else: () => val, is }), | |
| } | |
| }, |
andreivasilache
/ FlushEventLoop.test.js
Last active
May 18, 2021 11:59
[JEST] Wait for event loop to be cleared
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| const flushEventLoop = () => new Promise(resolve => setImmediate(resolve)); | |
| describe('Lorem ipsum', () => { | |
| it('waits for load', async () => { | |
| functionWithLotsOfMockPromises(); | |
| await waitForComponentToPaint(wrapper); | |
| expect(/**/).toBe(true) | |
| }) |
andreivasilache
/ WaitForComponentLoad.test.js
Last active
May 18, 2021 12:00
React Jest+react-dom/test-utils wait for component to finish updating state
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| import { mount } from 'enzyme'; | |
| import { act } from 'react-dom/test-utils'; | |
| const waitForComponentToPaint = async wrapper => { | |
| await act(async () => { | |
| await new Promise(resolve => setTimeout(resolve)); | |
| wrapper.update(); | |
| }); | |
| }; |