Question

我在两个模拟函数中都有一个prop模拟对象。我需要监视两个人，而且我不知道如何监视。

这是一个示例：

myComponent.js

function Package(props) {
  const { lockUI } = props
  lockUI.set();
  // ...
}

myComponent.test.js

import React from 'react';
import Package from 'src/Package';
import { cleanup, render } from '@testing-library/react';

describe('Package Unit Test', () => {
    let props;

    beforeEach(() => {
        props = {
            lockUI                                 : {
                set   : jest.fn(),
                unset : jest.fn(),
            },
        };
    });

    afterEach(cleanup);

    test('testing example', () => {
        render(<Package {...props} />);
        expect(props.lockUI.set).toHaveBeenCalledTimes(1);
    });
});

响应控制台：

 Expected number of calls: 1
 Received number of calls: 0

Answer 1

您只需要先声明setSpy和unsetSpy并将它们插入组件中即可

import React from 'react';
import Package from 'src/Package';
import { cleanup, render } from '@testing-library/react';

describe('Package Unit Test', () => {
    const setSpy = jest.fn();
    const unsetSpy = jest.fn();
    let props;

    beforeEach(() => {
        props = {
            lockUI                                 : {
                set   : setSpy,
                unset : unsetSpy,
            },
        };
    });

    afterEach(cleanup);

    test('testing example', () => {
        render(<Package {...props} />);
        expect(setSpy).toHaveBeenCalledTimes(1);
    });
});

用玩笑测试时对象道具中的间谍模拟功能如何？

1 个答案: