>我有一个局部函数,应该在单击按钮时调用该函数,并在其中设置布尔变量的状态。我尝试向此模块添加单元测试,以确定是否单击了按钮并在单击按钮后调用了该函数。
但我的测试失败了。我尝试在"描述"方法中模拟函数,但它不起作用。
某个组件.js
class SomeComponent extends React.Component {
constructor(props) {
super(props);
this.state = {
openImagesDialog: false,
}
}
fuctionToBeCalled = (val) => {
this.setState({ openImagesDialog: val })
}
render() {
return (
<a onClick={() => this.fuctionToBeCalled(true)} className="img-container float">
{child components....}
</a>
)
}
}
SomeComponent.test.js
import React from 'react';
import Enzyme, { shallow, mount } from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';
import SomeComponent from '../SomeComponent';
import SomeAnotherComp from "../SomeAnotherComp";
Enzyme.configure({ adapter: new Adapter() })
function setup() {
const props = {
openImagesDialog: false
}
let enzymeWrapper = shallow(<SomeComponent {...props} />)
return {
props,
enzymeWrapper
}
}
describe('components', () => {
const { props, enzymeWrapper } = setup()
it('should call fuctionToBeCalled(){}', () => {
const SomeAnotherCompProps = enzymeWrapper.find(SomeAnotherComp).props()
const fuctionToBeCalled = jest.fn(()=>true);
enzymeWrapper.find('a').simulate('click')
expect(fuctionToBeCalled).toBeCalled();
//expect(SomeAnotherCompProps.dialogOpen).toBe(true)
})
})
我想知道有没有其他方法可以尝试一下。
首先,openImagesDialog
不是道具,而是组件中的状态。其次,fuctionToBeCalled
是在组件实例上定义的函数,您需要对其进行spy
,而不仅仅是创建一个模拟函数。为此,您可以在组件实例上使用spyOn
。您还可以在模拟点击后检查状态
import React from 'react'
import Enzyme, { shallow, mount } from 'enzyme'
import Adapter from 'enzyme-adapter-react-16'
import SomeComponent from '../SomeComponent'
import SomeAnotherComp from "../SomeAnotherComp";
Enzyme.configure({ adapter: new Adapter() })
function setup() {
const props = {
openImagesDialog: false
}
let enzymeWrapper = shallow(<SomeComponent {...props} />)
return {
props,
enzymeWrapper,
}
}
describe('components', () => {
const { props, enzymeWrapper } = setup()
it('should call fuctionToBeCalled(){}', () => {
const SomeAnotherCompProps = enzymeWrapper.find(SomeAnotherComp).props()
const instance = enzymeWrapper.instance();
jest.spyOn(instance, 'fuctionToBeCalled');
enzymeWrapper.find('a').simulate('click')
expect(instance.fuctionToBeCalled).toBeCalled();
expect(enzymeWrapper.state('openImagesDialog')).toEqual(true);
})
})