javascript - 类型错误 : Cannot set property localStorage of#<Window> which has only a getter

Question

我在像这样的 unitests 中 mock localStorage

function storageMock() {
    var storage = {};
    ....
}

并设置 localStorage 之类的

window.localStorage = localStorageMock()

它工作正常，直到我将 Node 更新为 10.15.1 .
TypeError: Cannot set property localStorage of #<Window> which has only a getter 是抛出错误.

关于如何模拟 localStorage 并将其设置为 window.localStorage 的任何想法。

P.S 我得到的答案是 setItem和 getItem在 localStorage 上，有什么方法可以一次设置整个 localStorage。

Answer 1

添加

Object.defineProperty(window, 'localStorage', {
  value: storageMock
});

完整示例:

const localStorageMock = (() => {
  let store = {};

  return {
    getItem(key) {
      return store[key] || null;
    },
    setItem(key, value) {
      store[key] = value.toString();
    },
    removeItem(key) {
      delete store[key];
    },
    clear() {
      store = {};
    }
  };
})();

Object.defineProperty(window, 'localStorage', {
  value: localStorageMock
});

window.localStorage.setItem("KEY", "INPUT")