superagent mock for Jest tests. Stolen from http://bl.ocks.org/simenbrekken/b6282f713605b619834f

superagent.js

/* global jest */

var superagent = jest.genMockFunction().mockReturnThis();

var Response = jest.genMockFunction().mockImplementation(function() {
  this.status = 200;
  this.ok = true;
});

Response.prototype.get = jest.genMockFunction();
Response.prototype.toError = jest.genMockFunction();

var Request = jest.genMockFunction().mockImplementation(function(method, url) {
  this.method = method;
  this.url = url;
});

Request.prototype.accept = jest.genMockFunction().mockReturnThis();
Request.prototype.set = jest.genMockFunction().mockReturnThis();
Request.prototype.send = jest.genMockFunction().mockReturnThis();
Request.prototype.field = jest.genMockFunction().mockReturnThis();
Request.prototype.query = jest.genMockFunction().mockReturnThis();

Request.prototype.end = jest.genMockFunction().mockImplementation(function(callback) {
  if (superagent.mockDelay) {
    this.delayTimer = setTimeout(callback, 0, superagent.mockError, superagent.mockResponse);

    return;
  }

  callback(superagent.mockError, superagent.mockResponse);
});

Request.prototype.abort = jest.genMockFunction().mockImplementation(function() {
  this.aborted = true;

  if (this.delayTimer) {
    clearTimeout(this.delayTimer);
  }
});

superagent.Request = Request;
superagent.Response = Response;

superagent.mockResponse = new Response();
superagent.mockError = null;
superagent.mockDelay = false;

module.exports = superagent;