我如何在玩笑测试中处理localStorage? [英] How do I deal with localStorage in jest tests?

问题描述

在Jest测试中，我一直收到未定义localStorage"的说法，但是我有什么选择呢?撞砖墙.

I keep getting "localStorage is not defined" in Jest tests which makes sense but what are my options? Hitting brick walls.

推荐答案

来自 @chiedo

但是，我们使用ES2015语法，所以我觉得用这种方式编写代码要干净一些.

However, we use ES2015 syntax and I felt it was a little cleaner to write it this way.

class LocalStorageMock {
  constructor() {
    this.store = {};
  }

  clear() {
    this.store = {};
  }

  getItem(key) {
    return this.store[key] || null;
  }

  setItem(key, value) {
    this.store[key] = value.toString();
  }

  removeItem(key) {
    delete this.store[key];
  }
};

global.localStorage = new LocalStorageMock;

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