Add advanceDateByTime

[garrettmaring]

🚀 Feature Proposal

Jest has a great mocking for timers with useFakeTimers and advanceTimersByTime. It'd be very useful to have a similar set of utilities for setting the global Date.now() and manually advancing it.

Motivation

Testing Date related logic.

Example

An example of code that could be tested with this feature.

export type ElapsedTime = () => number;

export const createElapsedTime = (): ElapsedTime => {
  const mark = Date.now();

  return () => Date.now() - mark;
};

Pitch

Date related code is a central component of many modern applications. Being able to use the Jest ecosystem to test this code properly would expand the region of code that Jest can mock and test well.

[SimenB]

Duplicate of #2234, will be solved by #7776

[github-actions]

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