如何实现启用 Meteor Tracker 的功能？

Question

我正在编写一个支持 Meteor Tracker 的模块，但我无法对其进行测试。我添加了 meteor-standalone-tracker 作为 dev 依赖，并写了一个测试用例，但是 autorun 函数只被调用了一次。

例如，我写了一个虚拟测试启发from the docs如下

import assert from 'assert';
import Tracker from 'trackr';

describe('Testing Tracker', () => {

  it('should do as expected', () => {

    var favoriteFood = "apples";
    var favoriteFoodDep = new Tracker.Dependency;

    var getFavoriteFood = function () {
      favoriteFoodDep.depend();
      return favoriteFood;
    };

    var setFavoriteFood = function (newValue) {
      favoriteFood = newValue;
      favoriteFoodDep.changed();
    };

    console.log("GET:" , getFavoriteFood());
    // "apples"

    var handle = Tracker.autorun(function () {
      console.log("Your favorite food is " + getFavoriteFood());
    });
    // "Your favorite food is apples"

    setFavoriteFood("mangoes");
    // "Your favorite food is mangoes"
    setFavoriteFood("peaches");
    // "Your favorite food is peaches"
    setFavoriteFood("bananas");
    // "Your favorite food is bananas"
    handle.stop();
    setFavoriteFood("cake");
    // (nothing printed)

  });

});

我得到的只有输出是这样的：

console.log test/tracker.spec.js:27
   GET: apples

console.log test/tracker.spec.js:31
   Your favorite food is apples

我错过了什么？

Answer 1

我目前的解决方案是刷新所有计算。

Tracker.flush();

这将强制调用具有已更改的依赖项的 autorun 函数。

如何实现启用 Meteor Tracker 的功能？

How to implement a Meteor Tracker enabled feature?

javascript

meteor

jestjs

meteor-tracker