Agfdhyk

I'm testing a axios inside the getArticlesFromDatabase.

Seems like I'm doing wrong, cause console shows following message:

(node:36919) UnhandledPromiseRejectionWarning: Unhandled promise
rejection (rejection id: 5): here is reject fail:

(node:36919)
DeprecationWarning: Unhandled promise rejections are deprecated. In
the future, promise rejections that are not handled will terminate the
Node.js process with a non-zero exit code.

How to fix it?

csrfData.js

import axios from 'axios';



var getArticlesFromDatabase = new Promise(function(resolve, reject) {

    axios.get('127.0.0.1:8000/api/articles/get-articles-list').then(response=>{

        resolve('herer is resolve success: ',response.data);

    }).catch(function (error) {

        reject('herer is reject fail: ',error);

    });

});



export {getArticlesFromDatabase};

csrfData.test.js

import React from 'react';

import {shallow, configure} from 'enzyme';

import Adapter from 'enzyme-adapter-react-15';

import {expect} from 'chai';    

import axios from 'axios';

import MockAdapter from 'axios-mock-adapter';



import {getArticlesFromDatabase} from '../components/common/csrfData';



configure({adapter: new Adapter()});



describe('csrfData', function () {



    it('csrfData ', function () {



        let mock = new MockAdapter(axios);

        const data = { response: true };

        mock.onGet('127.0.0.1:8000/api/articles/get-articles-list').reply(200, data);



        getArticlesFromDatabase.then(function(value) {    

            console.log('getArticlesFromDatabase:    ',value);

        });



    });



});

There is a adapter plugin which helps in mocking the axios

https://github.com/ctimmerm/axios-mock-adapter

you can also refer my gist if you have generic method which returns the Axios Instance

https://gist.github.com/abhirathore2006/2bdc5e7e696e39e2cbf8b1800e33ecfc

Even i struggled a lot for this. But eventually i got the solution.

Here it is:

    import { .. } from '../yourServices';

    jest.mock('axios');

    var axios = require('axios');

    //If you use get, post write as below, If you are using axios(config) dont need to mock below

    jest.mock('axios', () => ({ post: jest.fn(),create: jest.fn() }));

Then in your tests

    describe('Sample Test', () => {

        it('Should get - Test', async () => {



            const mockedResponse = Promise.resolve({

               Response data

            });



         //Make sure you mock the the functions at import (above) before using here.    

            //Post case

            axios.post.mockResolvedValue(mockedResponse);

           //Create Case

            axios.create.mockResolvedValue(mockedResponse);

           //get ....





           //If you use default axios(url, config) or axios(config)

            axios.mockResolvedValue(mockedResponse);



            //Your code

        });

});