grafana/public/app/features/scenes/core/SceneTimeRange.test.tsx

import { SceneTimeRange } from './SceneTimeRange';

describe('SceneTimeRange', () => {
  it('when created should evaluate time range', () => {
    const timeRange = new SceneTimeRange({ from: 'now-1h', to: 'now' });
    expect(timeRange.state.value.raw.from).toBe('now-1h');
  });

  it('when time range refreshed should evaluate and update value', async () => {
    const timeRange = new SceneTimeRange({ from: 'now-30s', to: 'now' });
    const startTime = timeRange.state.value.from.valueOf();
    await new Promise((r) => setTimeout(r, 2));
    timeRange.onRefresh();
    const diff = timeRange.state.value.from.valueOf() - startTime;
    expect(diff).toBeGreaterThan(1);
  });

  it('toUrlValues with relative range', () => {
    const timeRange = new SceneTimeRange({ from: 'now-1h', to: 'now' });
    expect(timeRange.urlSync?.getUrlState(timeRange.state)).toEqual({
      from: 'now-1h',
      to: 'now',
    });
  });

  it('updateFromUrl with ISO time', () => {
    const timeRange = new SceneTimeRange({ from: 'now-1h', to: 'now' });
    timeRange.urlSync?.updateFromUrl({
      from: '2021-01-01T10:00:00.000Z',
      to: '2021-02-03T01:20:00.000Z',
    });

    expect(timeRange.state.from).toEqual('2021-01-01T10:00:00.000Z');
    expect(timeRange.state.value.from.valueOf()).toEqual(1609495200000);
  });
});