Jest Enzyme无法在mount()中找到导入的功能 [英] Jest Enzyme impossible to locate imported function in mount()

问题描述

我必须安装一个使用库中函数的组件.该函数在componentDidMount循环中使用.一切看起来都像这样:

I have to mount a component that uses a function from library. The function is used in the componentDidMount cycle. Everything looks somewhat like this:

import * as React from 'react';
import * as dayjs from 'dayjs';

class MyComponent extends React.Component {
    constructor(props) {
        super(props);
        this.slider = null;
    }
    componentDidMount() {
        this.setupValues();
    }
    setupValues() {
        this.slider = {
            ...,
            format: dayjs(val).format(...)
        }
    }
    render() {...}
}

现在我要在测试中使用的包装器是:

Now the wrapper that I am trying to use in my test is:

    const wrapper = mount(<MyComponent />);
    ...

遗憾的是，该测试甚至无法运行，因为安装功能失败:dayjs is not a function

Sadly, the test does not even run because the mount function fails saying: dayjs is not a function

为什么找不到导入的dayjs函数?

Why does it fail to find the imported dayjs function?

推荐答案

dayjs函数是 default导出模块的.

The dayjs function is the default export of the module.

这意味着您需要导入它像这样:

import dayjs from 'dayjs';

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