reactjs - 如何使用 jest 和 react 测试库测试 axios api?
问题描述
这是我编写 axios 逻辑的 apis.js
import axios from 'axios'
function logSuccess(req, res, next) {
console.log(req, res)
next(res)
}
function logError(req, res, e, next) {
console.log(req, res, e)
next(e)
}
function getResource(url, onComplete) {
let _onSuccess = (res) => logSuccess(url, res, onComplete)
let _onError = (res, e) => logError(url, res, e, onComplete)
let _onException = (e) => logError(url, null, e, onComplete)
axios
.get(url)
.then((res) => {
res ? _onSuccess(res) : _onError(res)
}, _onException)
.catch(_onException)
}
function postResource(url, data, cancelTokenSource, onComplete) {
let _onSuccess = (res) => logSuccess(url, res, onComplete)
let _onError = (res, e) => logError(url, res, e, onComplete)
let _onException = (e) => logError(url, null, e, onComplete)
axios
.post(url, data, { cancelToken: cancelTokenSource.token })
.then((res) => {
res ? _onSuccess(res) : _onError(res)
}, _onException)
.catch(_onException)
}
const apis = {
getResource,
postResource,
}
export default apis
这是我调用 axios 函数的另一个文件:
import apis from '../../commonUtils/apis/apis'
export default class LookingGlassAPIs {
constructor(params) {
let { apiRoot } = params
this.routers = {}
this.commandRequests = {}
this.routers.getAll = (...rest) =>
apis.getResource(apiRoot + 'routers', ...rest)
this.commandRequests.post = (...rest) =>
apis.postResource(apiRoot + 'commandRequests', ...rest)
}
}
const apiRoot = 'http://127.0.0.1:8080/'
我是新手,我不知道要为 axios 编写测试用例而不点击 api。任何人都可以帮助我。url 在另一个文件中定义,但仅供参考,我只在此处标明。我应该使用 axios.get.mockResolvedValue(data)???是正确的方式吗?
解决方案
例如,您必须模拟 axios 并查看是否使用正确的参数调用 axios 方法。
api.spec.js
import apis from './apis';
jest.mock('axios'); // This overwrites axios methods with jest Mock
import axios from 'axios';
describe('Test Apis', () => {
describe('getResource', () => {
describe('with success', () => {
const url = 'http://test-url.com';
const onComplete = jest.fn();
const data = {};
beforeEach(() => {
axios.get.mockResolvedValue(data);
});
it('should call axios get with given url', () => {
getResource(url, onComplete);
expect(axios.get).toBeCalledWith(url);
});
it('should call onComplete callback with response', async () => { // do not forget 'async'
await getResource(url, onComplete); // notice the 'await' because onComplete callback is called in '.then'
expect(onComplete).toBeCalledWith(data);
});
});
});
});
您可以对错误响应和 POST 方法执行相同的操作。您还可以通过模拟您的方法来测试您LookingGlassAPIs
的apis.js
方法,或者再次通过模拟来测试您的方法axios
,这取决于您项目中的“单元”定义。