timers.tick(milliseconds)

提前所有模拟定时器的时间。

【Advances time for all mocked timers.】

• milliseconds <number> 以毫秒为单位，用于推进计时器的时间量。

注意： 这与 Node.js 中 setTimeout 的行为有所不同，并且只接受正数。在 Node.js 中，setTimeout 支持负数仅出于网页兼容性的原因。

以下示例模拟了一个 setTimeout 函数，并通过使用 .tick 来推进时间，从而触发所有待处理的定时器。

【The following example mocks a setTimeout function and by using .tick advances in time triggering all pending timers.】

import assert from 'node:assert';
import { test } from 'node:test';

test('mocks setTimeout to be executed synchronously without having to actually wait for it', (context) => {
  const fn = context.mock.fn();

  context.mock.timers.enable(['setTimeout']);

  setTimeout(fn, 9999);

  assert.strictEqual(fn.mock.callCount(), 0);

  // Advance in time
  context.mock.timers.tick(9999);

  assert.strictEqual(fn.mock.callCount(), 1);
});const assert = require('node:assert');
const { test } = require('node:test');

test('mocks setTimeout to be executed synchronously without having to actually wait for it', (context) => {
  const fn = context.mock.fn();
  context.mock.timers.enable(['setTimeout']);

  setTimeout(fn, 9999);
  assert.strictEqual(fn.mock.callCount(), 0);

  // Advance in time
  context.mock.timers.tick(9999);

  assert.strictEqual(fn.mock.callCount(), 1);
});拷贝

或者，.tick 函数可以被多次调用

【Alternativelly, the .tick function can be called many times】

import assert from 'node:assert';
import { test } from 'node:test';

test('mocks setTimeout to be executed synchronously without having to actually wait for it', (context) => {
  const fn = context.mock.fn();
  context.mock.timers.enable(['setTimeout']);
  const nineSecs = 9000;
  setTimeout(fn, nineSecs);

  const twoSeconds = 3000;
  context.mock.timers.tick(twoSeconds);
  context.mock.timers.tick(twoSeconds);
  context.mock.timers.tick(twoSeconds);

  assert.strictEqual(fn.mock.callCount(), 1);
});const assert = require('node:assert');
const { test } = require('node:test');

test('mocks setTimeout to be executed synchronously without having to actually wait for it', (context) => {
  const fn = context.mock.fn();
  context.mock.timers.enable(['setTimeout']);
  const nineSecs = 9000;
  setTimeout(fn, nineSecs);

  const twoSeconds = 3000;
  context.mock.timers.tick(twoSeconds);
  context.mock.timers.tick(twoSeconds);
  context.mock.timers.tick(twoSeconds);

  assert.strictEqual(fn.mock.callCount(), 1);
});拷贝