Nock and Proxyquire to easily mock code that makes API calls when testing

proxyquire-nock-api-test.js

var nock = require('nock')
var proxyquire = require('proxyquire')

// get a refrence to the code that defines the external api call
var generateConfigForApiCall = require('../../../lib/api-config')

// data for testing
var mockData = require('../../mock-data')()

// require with proxyquire, and override the module that builds the api config
var runExternalApiCode = proxyquire('../../../tasks/run-external-api-code',
  {'../lib/api-config': function (options) {
    // run the module to get the right config
    var psConfig = generateConfigForExternalCall(options)
    // now that we have the config, use nock to intercept the coming http request
    // and reply with the mock data
    nock('https://' + psConfig.host)
      .get(psConfig.path)
      .reply(200, mockData)
    // return the data as expected
    return psConfig
  }
})

Do you have a working example? I like your setup a lot.