我已经查看了以下帖子,但仍然遇到在 React 中使用 useNavigate 进行重定向的问题。
https://github.com/remix-run/react-router/issues/7811
创建帖子片段
const result = await dispatch(postCreateView(postObj))
if(result){
nav('/posts')
}
测试设置
import {screen, render, fireEvent} from '@testing-library/react'
import { MockComponent } from '../../testMockComponentWrapper'
import { PostCreate } from '../PostCreate'
const mockedUsedNavigate = jest.fn();
jest.mock('react-router-dom', () => ({
...jest.requireActual('react-router-dom'),
useNavigate: () => mockedUsedNavigate,
}));
describe('Post Create', () => {
it('successful post with redirect', async () => {
const {container} = render(<MockComponent><PostCreate/></MockComponent>)
const titleElement = screen.getByPlaceholderText(/enter title/i)
const descriptionElement = screen.getByPlaceholderText(/enter description/i)
const buttonElement = screen.getByRole('button')
fireEvent.change(titleElement, {target: {value: 'A New title from Testing'}})
fireEvent.change(descriptionElement, {target: {value: 'A New description from Testing'}})
fireEvent.click(buttonElement)
expect(mockedUsedNavigate).toHaveBeenCalledTimes(1);
})
})
模拟组件:
export const MockComponent = (props) => {
return(
<BrowserRouter>
<Provider store={store}>
{props.children}
</Provider>
</BrowserRouter>
)
}
我也试过
export const MockComponent = (props) => {
return(
<Router>
<Provider store={store}>
{props.children}
</Provider>
</Router>
)
}
BrowserRouter 报错:
TypeError: Cannot read property 'pathname' of undefined
使用 Router I 我得到的错误:
Expected number of calls: 1
Received number of calls: 0
我原以为调用次数会是 1,因为 useNavigate 会由 jest 处理,但事实似乎并非如此。
我使用的版本:
"@testing-library/jest-dom": "^5.16.1",
"@testing-library/react": "^12.1.2",
"@testing-library/user-event": "^13.5.0",
"react": "^17.0.2",
"react-router-dom": "^6.2.1",
仅供引用,以下确实有效并测试了 react-redux 的调度方法:
const mockDispatch = jest.fn();
jest.mock('react-redux', () => ({
...jest.requireActual('react-redux'),
useDispatch: () => mockDispatch
}))
// In the test
await expect(mockDispatch).toHaveBeenCalledTimes(1);
如果有人对此提供帮助,我将不胜感激。如果有更好的地方发布这个问题或我错过的 SO 指南,我提前道歉,我们将不胜感激。提前谢谢你。
最佳答案
阿格! super 简单的答案......有时它有助于在 SO 上发布问题所以它迫使我更深入地挖掘......:)
这里是任何感兴趣的人的解决方案和解释......感谢阅读
import {screen, render, fireEvent} from '@testing-library/react'
import { MockComponent } from '../../testMockComponentWrapper'
import { PostCreate } from '../PostCreate'
// mock useDispatch
const mockDispatch = jest.fn();
jest.mock('react-redux', () => ({
...jest.requireActual('react-redux'),
useDispatch: () => mockDispatch.mockReturnValueOnce(true) // Return a value since I'm expecting a value to be returned before I redirect
}))
// mock useNavigate
const mockedUsedNavigate = jest.fn();
jest.mock('react-router-dom', () => ({
...jest.requireActual('react-router-dom'),
useNavigate: () => mockedUsedNavigate, // Return an empty jest function to test whether it was called or not...I'm not depending on the results so no need to put in a return value
}));
describe('Post Create', () => {
it('successful post with redirect', async () => {
const {container} = render(<MockComponent><PostCreate/></MockComponent>)
const titleElement = screen.getByPlaceholderText(/enter title/i)
const descriptionElement = screen.getByPlaceholderText(/enter description/i)
const buttonElement = screen.getByRole('button')
fireEvent.change(titleElement, {target: {value: 'A New title from Testing'}})
fireEvent.change(descriptionElement, {target: {value: 'A New description from Testing'}})
fireEvent.click(buttonElement)
// Await the dispatch results
await expect(mockDispatch).toHaveBeenCalledTimes(1);
await expect(mockedUsedNavigate).toHaveBeenCalledTimes(1);
})
})
如果我在解释或理解中遗漏了什么,我将不胜感激更新或见解。谢谢,
关于reactjs - react 模拟测试 useNavigate,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/70896585/