经过大量的努力,我无法弄清楚这一点,因此计划获得帮助。我在node + express应用中使用的中间件如下:
import mainConfig from '../mainConfig/index';
const axios = require('axios');
module.exports = {
authHandler: (req, res, next) => {
return mainConfig.initialize().then(() => {
const apiUri = mainConfig.get('app.api');
if (apiUri) {
return axios.get(apiUri).then(response => {
next();
}).catch(error => {
res.redirect('/expired');
throw new Error(error);
});
}
}).catch(() => {
});
}
};
为此,我编写了一个测试案例,可以模拟axios和mainCongig模块。现在,我想测试在解决axios的请求时是否调用了next()
。有人可以帮我吗?
我写的测试用例是:
import mainConfig from '../mainConfig';
const axios = require('axios');
const middlewares = require('./check-auth');
jest.mock('axios');
describe('Check-Auth Token', () => {
it('should call the Sign In API when live Conf is initalized and have the API URL', () => {
mainConfig.get = jest.fn();
mainConfig.get.mockReturnValue('https://reqres.in/api/users');
mainConfig.initialize = jest.fn(() => Promise.resolve({ data: {} }));
const req = jest.fn(), res = { sendStatus: jest.fn() }, next = jest.fn();
axios.get.mockImplementation(() => Promise.resolve({ data: {} }));
middlewares.authHandler(req, res, next);
expect(next).toHaveBeenCalled(); // coming as not called.
});
});
答案 0 :(得分:1)
您必须等待中间件解决。当您从中间件返回承诺时,可以使用await
语句在测试中等待:
import mainConfig from '../mainConfig';
const axios = require('axios');
const middlewares = require('./check-auth');
jest.mock('axios');
describe('Check-Auth Token', () => {
it('should call the Sign In API when live Conf is initalized and have the API URL', async () => {
mainConfig.get = jest.fn();
mainConfig.get.mockReturnValue('https://reqres.in/api/users');
mainConfig.initialize = jest.fn(() => Promise.resolve({ data: {} }));
const req = jest.fn(), res = { sendStatus: jest.fn() }, next = jest.fn();
axios.get.mockImplementation(() => Promise.resolve({ data: {} }));
await middlewares.authHandler(req, res, next);
expect(next).toHaveBeenCalled(); // coming as not called.
});
});
请注意,为了能够使用await
关键字,您需要使用async
定义测试。
答案 1 :(得分:0)
我不是专家,但是据我所知,您正在测试异步代码。因此,您必须使用done()
关键字。查找此以获得更多信息:https://jestjs.io/docs/en/asynchronous