Question

我正在使用Jest来测试我的反应应用程序，我有一个组件，可以使用componentwillmount方法从localStorage解析一些状态数据，并将其保存到它的状态。

像这样：

componentWillMount() {
    let keys = Object.keys(localStorage);
    let data = [];

    keys.map((key) => {
        if(Date.parse(key) && moment(key).isValid()) {
            let item = JSON.parse(localStorage.getItem(key));
            item['date'] = moment(key);
            data.push(item)
        }
    });
    this.setState({
        data: data
    })
}

我正在使用jest-localstorage-mock软件包来模拟localStorage for Jest，每当我调用localStorage.setItem(KEY, VALUE)时，它都会被放置在localStorage.__STORE__中。这是测试。

it('Should get data from localstorage', () => {
    let obj = {
        date: "2017-12-23T17:33:33.265Z",
        obj: {"pain":"3","work":"9","sleep":"8","notes":"notes","pressure":1025
    }};

    localStorage.setItem(obj.date, JSON.stringify(obj.obj));
    expect(localStorage.setItem).toHaveBeenCalledTimes(1); // PASSES
    const wrapper = shallow(<Main />);
    console.log(localStorage.__STORE__); // LOOKS LIKE IT SHOULD
    console.log(wrapper.state()); // EMPTY! because all the data is placed into localStorage.__STORE__
    expect(localStorage.getItem).toHaveBeenCalledTimes(1) // FAILS
})

如何让这两个一起工作，以便我可以测试从localStorage检索

使用Jest＆amp; amp;测试localStorage应对

0 个答案: