58 lines
1.9 KiB
TypeScript
58 lines
1.9 KiB
TypeScript
import { act } from 'react-dom/test-utils';
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import { now, useYesterday } from './use-yesterday';
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import { renderHook } from '@testing-library/react';
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describe('now', () => {
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beforeAll(() => {
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jest.useFakeTimers().setSystemTime(new Date('1970-01-05T14:36:20.100Z'));
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});
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afterAll(() => {
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jest.useRealTimers();
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});
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it.each([
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{ o: '1970-01-05T14:36:20.000Z', roundBy: 1 }, // by 1ms
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{ o: '1970-01-05T14:36:00.000Z', roundBy: 60 * 1000 }, // by 1m
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{ o: '1970-01-05T14:35:00.000Z', roundBy: 5 * 60 * 1000 }, // by 5m
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{ o: '1970-01-05T14:30:00.000Z', roundBy: 10 * 60 * 1000 }, // by 10m
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{ o: '1970-01-05T14:20:00.000Z', roundBy: 20 * 60 * 1000 }, // by 20m
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{ o: '1970-01-05T14:00:00.000Z', roundBy: 60 * 60 * 1000 }, // by 1h
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{ o: '1970-01-05T00:00:00.000Z', roundBy: 24 * 60 * 60 * 1000 }, // by 1d
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])(
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'returns the now timestamp rounded by given number (ms)',
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({ roundBy, o }) => {
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expect(now(roundBy)).toEqual(new Date(o).getTime());
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}
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);
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});
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describe('useYesterday', () => {
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beforeAll(() => {
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jest.useFakeTimers().setSystemTime(new Date('1970-01-05T14:36:20.100Z'));
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});
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afterAll(() => {
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jest.useRealTimers();
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});
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it('returns yesterday timestamp rounded by 5 minutes', () => {
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const { result, rerender } = renderHook(() => useYesterday());
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expect(result.current).toEqual(
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new Date('1970-01-04T14:35:00.000Z').getTime()
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);
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rerender();
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rerender();
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rerender();
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expect(result.current).toEqual(
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new Date('1970-01-04T14:35:00.000Z').getTime()
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);
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});
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it('updates yesterday timestamp after 5 minutes', () => {
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const { result, rerender } = renderHook(() => useYesterday());
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act(() => {
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jest.advanceTimersByTime(5 * 60 * 1000);
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rerender();
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});
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expect(result.current).toEqual(
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new Date('1970-01-04T14:40:00.000Z').getTime()
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);
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});
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});
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