Axios: Jest and Nock return Network Error when making requests with Axios

Summary

Testing async code with Jest or Nock always return Network Error.

This is reported by others:
https://www.bountysource.com/issues/38003315-network-error-when-using-nock-with-axios
https://stackoverflow.com/questions/42677387/jest-returns-network-error-when-doing-an-authenticated-request-with-axios

I've actually used the first solution suggested on that StackOverflow: "Solution change axios adapter to http". That actually works.

Without forcing the http adapter, running "npm test" with Jest cause the test to never complete and stay stuck forever.

I am not sure this is an Axios issue rather than Jest or Nock and this is not the point.

What is strange is the stacktrace below: it seem to me that is running the xhr implementation. Isn't this strange in the node environment?
Is there a simpler way to force using the http adapter than the one advised on StackOverflow?

Network Error

      
      at createError (node_modules/axios/lib/core/createError.js:16:15)
      at XMLHttpRequest.handleError [as onerror] (node_modules/axios/lib/adapters/xhr.js:87:14)
      at XMLHttpRequest.callback.(anonymous function) (node_modules/jsdom/lib/jsdom/living/events/EventTarget-impl.js:289:32)
      at invokeEventListeners (node_modules/jsdom/lib/jsdom/living/events/EventTarget-impl.js:219:27)
      at invokeInlineListeners (node_modules/jsdom/lib/jsdom/living/events/EventTarget-impl.js:166:7)
      at EventTargetImpl._dispatch (node_modules/jsdom/lib/jsdom/living/events/EventTarget-impl.js:122:7)
      at EventTargetImpl.dispatchEvent (node_modules/jsdom/lib/jsdom/living/events/EventTarget-impl.js:87:17)
      at XMLHttpRequest.dispatchEvent (node_modules/jsdom/lib/jsdom/living/generated/EventTarget.js:61:35)
      at dispatchError (node_modules/jsdom/lib/jsdom/living/xmlhttprequest.js:994:9)
      at validCORSHeaders (node_modules/jsdom/lib/jsdom/living/xmlhttprequest.js:1009:7)
      at receiveResponse (node_modules/jsdom/lib/jsdom/living/xmlhttprequest.js:871:12)
      at EventEmitter.client.on.res (node_modules/jsdom/lib/jsdom/living/xmlhttprequest.js:691:38)
      at emitOne (events.js:96:13)
      at EventEmitter.emit (events.js:191:7)
      at Request.realClient.on.res (node_modules/jsdom/lib/jsdom/living/xhr-utils.js:281:49)
      at emitOne (events.js:96:13)
      at Request.emit (events.js:191:7)
      at Request.onRequestResponse (node_modules/request/request.js:1074:10)
      at emitOne (events.js:101:20)
      at ClientRequest.emit (events.js:191:7)
      at HTTPParser.parserOnIncomingClient (_http_client.js:522:21)
      at HTTPParser.parserOnHeadersComplete (_http_common.js:99:23)
      at Socket.socketOnData (_http_client.js:411:20)
      at emitOne (events.js:96:13)
      at Socket.emit (events.js:191:7)
      at readableAddChunk (_stream_readable.js:178:18)
      at Socket.Readable.push (_stream_readable.js:136:10)
      at TCP.onread (net.js:561:20)

Context

• axios version: v0.16.2
• Environment: node v7.10, Ubuntu 17.04 Linux 4.10