react-native-easy-calendar/lib/module/Hooks/useSurroundingTimeUnits.test.js

Customizable, easy-to-use, performant calendar components for React Native

import { renderHook } from '@testing-library/react-hooks';
import useSurroundingTimeUnits from './useSurroundingTimeUnits';
test('Should return surrounding time units', () => {
  const {
    result,
    rerender
  } = renderHook(({
    visibleDate
  }) => useSurroundingTimeUnits(visibleDate), {
    initialProps: {
      visibleDate: '2020-01-06'
    }
  });
  expect(result.current.month.current.start.isSame('2020-01-01', 'day')).toBe(true);
  expect(result.current.month.current.end.isSame('2020-01-31', 'day')).toBe(true);
  expect(result.current.month.last.start.isSame('2019-12-01', 'day')).toBe(true);
  expect(result.current.month.last.end.isSame('2019-12-31', 'day')).toBe(true);
  expect(result.current.month.next.start.isSame('2020-02-01', 'day')).toBe(true);
  expect(result.current.month.next.end.isSame('2020-02-29', 'day')).toBe(true);
  rerender({
    visibleDate: '2020-01-01'
  });
  expect(result.current.month.current.start.isSame('2020-01-01', 'day')).toBe(true);
  expect(result.current.month.current.end.isSame('2020-01-31', 'day')).toBe(true);
  expect(result.current.month.last.start.isSame('2019-12-01', 'day')).toBe(true);
  expect(result.current.month.last.end.isSame('2019-12-31', 'day')).toBe(true);
  expect(result.current.month.next.start.isSame('2020-02-01', 'day')).toBe(true);
  expect(result.current.month.next.end.isSame('2020-02-29', 'day')).toBe(true);
  rerender({
    visibleDate: '2020-02-01'
  });
  expect(result.current.month.current.start.isSame('2020-02-01', 'day')).toBe(true);
  expect(result.current.month.current.end.isSame('2020-02-29', 'day')).toBe(true);
  expect(result.current.month.last.start.isSame('2020-01-01', 'day')).toBe(true);
  expect(result.current.month.last.end.isSame('2020-01-31', 'day')).toBe(true);
  expect(result.current.month.next.start.isSame('2020-03-01', 'day')).toBe(true); // console.log(result.current.month.next.end.format());

  expect(result.current.month.next.end.isSame('2020-03-31', 'day')).toBe(true);
});
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