nock-test.js

const nock = require("nock");
const axios = require("axios");

var scope = nock("http://www.example.com")
  .get("/resource")
  .reply(200, "domain matched");

axios.get("http://www.example.com/resource").then(body => {
  console.log("1.--------------mocking response");
  console.log("body.status", body.status);

  scope.done();

  axios
    .get("http://www.example.com/resource")
    .then(body => {
      console.log("2.------------real response");
      console.log("body.status", body.status);
    })
    .catch(err => {
      console.log("2.------------real response");
      console.log("err", err.status);
    });
});