@brightlayer-ui/react-auth-workflow/lib/clock.js

Re-usable workflow components for Authentication and Registration within Eaton applications.

import { subMilliseconds, differenceInMilliseconds } from 'date-fns';
let timeTravelOffset = 0;
let frozenTime;
const internalNow = () => {
    if (frozenTime) {
        return frozenTime;
    }
    return subMilliseconds(new Date(), timeTravelOffset);
};
const now = () => internalNow();
const assertInTest = () => {
    if (process.env.NODE_ENV !== 'test') {
        throw new Error('Time travel is only allowed in tests!');
    }
};
const timeTravel = (time) => {
    assertInTest();
    timeTravelOffset = differenceInMilliseconds(new Date(), typeof time === 'string' ? new Date(time) : time);
    frozenTime = undefined;
};
const restoreTime = () => {
    assertInTest();
    timeTravelOffset = 0;
    frozenTime = undefined;
};
const freezeTime = (time) => {
    assertInTest();
    if (time) {
        timeTravel(time);
    }
    frozenTime = internalNow();
};
const unfreezeTime = () => {
    assertInTest();
    frozenTime = undefined;
};
export const Clock = {
    now,
    Testing: {
        timeTravel,
        restoreTime,
        freezeTime,
        unfreezeTime,
    },
};