我有一个<UserListComponent />
,它会输出一个<Contact />
组件和<Contacts />
提供的联系人列表。
问题在于,当我尝试安装<UserListComponent />
的测试时,测试输出错误Invariant Violation: You should not use <Route> or withRouter() outside a <Router>
withRouter()
用于<Contacts />
组件。
如何在没有路由器的情况下模拟ContactsComponent
来测试父组件?
我发现了一些类似问题https://www.bountysource.com/issues/49297944-invariant-violation-you-should-not-use-route-or-withrouter-outside-a-router
但它只描述了组件由withRouter()
本身覆盖的情况,而不是儿童。
UserList.test.jsx
const mockResp = {
count: 2,
items: [
{
_id: 1,
name: 'User1',
email: 'email1@gmail.com',
phone: '+123456',
online: false
},
{
_id: 2,
name: 'User2',
email: 'email2@gmail.com',
phone: '+789123',
online: false
},
{
_id: 3,
name: 'User3',
email: 'email3@gmail.com',
phone: '+258369147',
online: false
}
],
next: null
}
describe('UserList', () => {
beforeEach(() => {
fetch.resetMocks()
});
test('should output list of users', () => {
fetch.mockResponseOnce(JSON.stringify(mockResp));
const wrapper = mount(<UserListComponent user={mockResp.items[2]} />);
expect(wrapper.find('.contact_small')).to.have.length(3);
});
})
UserList.jsx
export class UserListComponent extends PureComponent {
render() {
const { users, error } = this.state;
return (
<React.Fragment>
<Contact
userName={this.props.user.name}
content={this.props.user.phone}
/>
{error ? <p>{error.message}</p> : <Contacts type="contactList" user={this.props.user} contacts={users} />}
</React.Fragment>
);
}
}
Contacts.jsx
class ContactsComponent extends Component {
constructor() {
super();
this.state = {
error: null,
};
}
render() {
return (
<React.Fragment>
<SectionTitle title="Contacts" />
<div className="contacts">
//contacts
</div>
</React.Fragment>
);
}
}
export const Contacts = withRouter(ContactsComponent);
答案 0 :(得分:45)
要测试包含<Route>
和withRouter
的组件(使用Jest),您需要在测试中导入路由器,而不是在组件中导入
import { BrowserRouter as Router } from 'react-router-dom';
并像这样使用
app = shallow(
<Router>
<App />
</Router>);
答案 1 :(得分:17)
在测试中使用路由器包装挂载有效,但有些情况下您不希望路由器成为挂载中的父组件。因此,我正在使用包装函数将上下文注入mount:
import { BrowserRouter } from 'react-router-dom';
import Enzyme, { shallow, mount } from 'enzyme';
import { shape } from 'prop-types';
// Instantiate router context
const router = {
history: new BrowserRouter().history,
route: {
location: {},
match: {},
},
};
const createContext = () => ({
context: { router },
childContextTypes: { router: shape({}) },
});
export function mountWrap(node) {
return mount(node, createContext());
}
export function shallowWrap(node) {
return shallow(node, createContext());
}
这可能位于测试帮助程序目录中名为contextWrap.js的文件中。
import React from 'react';
import { TableC } from '../../src/tablec';
import { mountWrap, shallowWrap } from '../testhelp/contextWrap';
import { expectedProps } from './mockdata'
describe('Table', () => {
let props;
let component;
const wrappedShallow = () => shallowWrap(<TableC {...props} />);
const wrappedMount = () => mountWrap(<TableC {...props} />);
beforeEach(() => {
props = {
query: {
data: tableData,
refetch: jest.fn(),
},
};
if (component) component.unmount();
});
test('should render with mock data in snapshot', () => {
const wrapper = wrappedShallow();
expect(wrapper).toMatchSnapshot();
});
test('should call a DeepTable with correct props', () => {
const wrapper = wrappedMount();
expect(wrapper.find('DeepTable').props()).toEqual(expectedProps);
});
});
您还可以使用此模式将子组件包装在其他类型的上下文中,例如,如果您使用的是react-intl,material-ui或您自己的上下文类型。
答案 2 :(得分:3)
您需要用App
或等效符号包装BrowserRouter
,
请参阅下面的简单测试案例示例,其中是使用React Router的组件App
import React from "react";
import ReactDOM from "react-dom";
import { BrowserRouter } from "react-router-dom";
import App from "./App";
it("renders without crashing", () => {
const div = document.createElement("div");
ReactDOM.render(
<BrowserRouter>
<App />
</BrowserRouter>,
div
);
ReactDOM.unmountComponentAtNode(div);
})
答案 3 :(得分:3)
A将“ URL”的历史记录保留在内存中(不读取或写入地址栏)。在测试和非浏览器环境(例如React Native)中很有用。
我得到了类似的错误解决方案,是在Memory router的帮助下包装了组件
import { MemoryRouter } from 'react-router'
<MemoryRouter>
<App/>
</MemoryRouter>
答案 4 :(得分:1)
实际上,我曾经使用react-test-renderer
为我的组件创建快照测试,并且遇到了这个问题,我只是用BrowserRouter
附带的react-router-dom
包装了我的组件,您可以像下面这样:
import React from 'react'
import { BrowserRouter } from 'react-router-dom'
import renderer from "react-test-renderer";
import UserListComponent from './whatever'
test('some description', () => {
const props = { ... }
const jsx = (
<BrowserRouter>
<UserListComponent {...props} />
</BrowserRouter>
)
const tree = renderer.create(jsx).toJSON()
expect(tree).toMatchSnapshot()
})
如果要多次测试,完全建议在这种情况下使用测试工厂!
答案 5 :(得分:1)
添加路由器标签以呈现它。
import * as React from "react";
import { render, mount } from 'enzyme';
import { BrowserRouter as Router } from "react-router-dom"
import CategoriesToBag from "../CategoriesToBag";
describe('Testing CategoriesToBag Component', () => {
test("check if heading is correct", () => {
const defaultValue = "Amazing Categories To Bag";
const wrapper = render(<Router><CategoriesToBag /></Router>);
expect(wrapper.find('.textBannerTitle').text()).toMatch(/Categories To Bag/);
expect(wrapper.find('.textBannerTitle').text()).not.toMatch(/Wrong Match/);
expect(wrapper.find('.textBannerTitle').text()).toBe(defaultValue);
});
});
你应该没事了。
答案 6 :(得分:0)
我遇到了同样的问题,第一个注释对我有所帮助,但是有很多代码 我有更好的方法来解决这个问题。 请参阅下面的解决方案:
import React from 'react';
import { shallow, mount } from 'enzyme';
import SisuSignIn from '../../../components/Sisu/SisuSignIn.js';
import { MemoryRouter } from 'react-router-dom';
const Container = SisuSignIn;
let wrapper;
beforeEach(() => {
wrapper = shallow(<Container />);
});
describe('SisuSignIn', () => {
it('renders correctly', () => {
expect(wrapper).toMatchSnapshot();
});
it('should render one <h1>', () => {
const wrapper = mount(
<MemoryRouter>
<SisuSignIn auth={{ loading: false }} />
</MemoryRouter>
);
expect(wrapper.find('div').length).toBe(12);
});
});