Setting up axios so that it doesn't use Jest's mocked XMLHttpRequest

jest-axios-setup.md

You can set the default adapter for axios in your test setup file.

In package.json

{
  "jest": {
    "setupTestFrameworkScriptFile": "<rootDir>/test-setup.js",
  }
}

And then in test-setup.js

const path = require('path');
const axios = require('axios');
const adapterPath = path.join(
  path.dirname(require.resolve('axios')), 
  'lib/adapters/http'
);
const adapter = require(adapterPath);

axios.defaults.adapter = adapter;