[英]Unit testing React click outside component
使用此答案中的代碼解決在組件外部單擊的問題:
componentDidMount() {
document.addEventListener('mousedown', this.handleClickOutside);
}
componentWillUnmount() {
document.removeEventListener('mousedown', this.handleClickOutside);
}
setWrapperRef(node) {
this.wrapperRef = node;
}
handleClickOutside(event) {
if (this.wrapperRef && !this.wrapperRef.contains(event.target)) {
this.props.actions.something() // Eg. closes modal
}
}
我不知道如何對不愉快的路徑進行單元測試,因此警報不會運行,到目前為止我得到了什么:
it('Handles click outside of component', () => {
props = {
actions: {
something: jest.fn(),
}
}
const wrapper = mount(
<Component {... props} />,
)
expect(props.actions.something.mock.calls.length).toBe(0)
// Happy path should trigger mock
wrapper.instance().handleClick({
target: 'outside',
})
expect(props.actions.something.mock.calls.length).toBe(1) //true
// Unhappy path should not trigger mock here ???
expect(props.actions.something.mock.calls.length).toBe(1)
})
我試過了:
wrapper.html()
發送.find
一個節點並發送(不模擬event.target
).simulate
click
里面的一個元素(不觸發事件監聽器)我確定我遺漏了一些小東西,但我在任何地方都找不到這樣的例子。
import { mount } from 'enzyme'
import React from 'react'
import ReactDOM from 'react-dom'
it('Should not call action on click inside the component', () => {
const map = {}
document.addEventListener = jest.fn((event, cb) => {
map[event] = cb
})
const props = {
actions: {
something: jest.fn(),
}
}
const wrapper = mount(<Component {... props} />)
map.mousedown({
target: ReactDOM.findDOMNode(wrapper.instance()),
})
expect(props.actions.something).not.toHaveBeenCalled()
})
github上這個酶問題的解決方案。
選擇的答案沒有覆蓋handleClickOutside
的else路徑
我在 ref 元素上添加了 mousedown 事件以觸發handleClickOutside
其他路徑
import { mount } from 'enzyme'
import React from 'react'
import ReactDOM from 'react-dom'
it('Should not call action on click inside the component', () => {
const map = {}
document.addEventListener = jest.fn((event, cb) => {
map[event] = cb
})
const props = {
actions: {
something: jest.fn(),
}
}
//test if path of handleClickOutside
const wrapper = mount(<Component {... props} />)
map.mousedown({
target: ReactDOM.findDOMNode(wrapper.instance()),
})
//test else path of handleClickOutside
const refWrapper = mount(<RefComponent />)
map.mousedown({
target: ReactDOM.findDOMNode(refWrapper.instance()),
})
expect(props.actions.something).not.toHaveBeenCalled()
})
我找到了可以避免使用ReactDOM.findDOMNode
的案例/解決方案。 處理以下示例:
import React from 'react';
import { shallow } from 'enzyme';
const initFireEvent = () => {
const map = {};
document.addEventListener = jest.fn((event, cb) => {
map[event] = cb;
});
document.removeEventListener = jest.fn(event => {
delete map[event];
});
return map;
};
describe('<ClickOutside />', () => {
const fireEvent = initFireEvent();
const children = <button type="button">Content</button>;
it('should call actions.something() when clicking outside', () => {
const props = {
actions: {
something: jest.fn(),
}
};
const onClick = jest.fn();
mount(<ClickOutside {...props}>{children}</ClickOutside>);
fireEvent.mousedown({ target: document.body });
expect(props.actions.something).toHaveBeenCalledTimes(1);
});
it('should NOT call actions.something() when clicking inside', () => {
const props = {
actions: {
something: jest.fn(),
}
};
const wrapper = mount(
<ClickOutside onClick={onClick}>{children}</ClickOutside>,
);
fireEvent.mousedown({
target: wrapper.find('button').instance(),
});
expect(props.actions.something).not.toHaveBeenCalled();
});
});
版本:
"react": "^16.8.6",
"jest": "^25.1.0",
"enzyme": "^3.11.0",
"enzyme-adapter-react-16": "^1.15.2"
最簡單的事情就是在身體上 dispatchEvent
mount(<MultiTagSelect {...props} />); window.document.body.dispatchEvent(new Event('click'));
使用sinon
來跟蹤handleClickOutside
是否被調用。 順便說一句,我剛剛發布了我們的項目,我需要在Nav
組件中進行單元測試。 實際上,當您單擊外部時,應關閉所有子菜單。
import sinon from 'sinon';
import Component from '../src/Component';
it('handle clicking outside', () => {
const handleClickOutside = sinon.spy(Component.prototype, 'handleClickOutside');
const wrapper = mount(
<div>
<Component {... props} />
<div><a class="any-element-outside">Anylink</a></div>
</div>
);
wrapper.find('.any-element-outside').last().simulate('click');
expect(handleClickOutside.called).toBeTruthy();
handleClickOutside.restore();
})
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