flyd-ajax/mock.js

Functional reactive ajax client

'use strict';

var _ramda = require('ramda');

var _ramda2 = _interopRequireDefault(_ramda);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

// Mock ajax requests for flyd-ajax

var handlers = {};
var cachedXMLHttpRequest = null;

// Catch a request to a url and mock the response
function handle(method, url, resp) {
  handlers[method.toLowerCase() + ' ' + url] = resp;
}

// Overwrite XMLHttpRequest
function setup() {
  cachedXMLHttpRequest = window.XMLHttpRequest;
  window.XMLHttpRequest = function () {
    this.headers = {};
    this.body = '';
    this.response = '';
    this.eventListeners = {};
    this.realRequest = new cachedXMLHttpRequest();
    return this;
  };

  window.XMLHttpRequest.prototype.addEventListener = function (name, fn) {
    this.eventListeners[name] = fn;
    this.realRequest.addEventListener.apply(this.realRequest, arguments);
    return this;
  };

  window.XMLHttpRequest.prototype.getResponseHeader = function (name, fn) {
    return this.headers[name];
  };

  // No-op
  window.XMLHttpRequest.prototype.setRequestHeader = function (name, val) {
    this.realRequest.setRequestHeader.apply(this.realRequest, arguments);
    return this;
  };

  window.XMLHttpRequest.prototype.send = function (strData) {
    var handler = handlers[this.method + ' ' + this.url];
    if (!handler) {
      log('requested without handler: ' + this.method + ' ' + this.url);
      log('current handlers:', _ramda2.default.keys(handlers));
      return this.realRequest.send.apply(this.realRequest, arguments);
    } else {
      log('handled: ' + this.method + ' ' + this.url);
    }
    var result = handler;
    if (!result.dontResolve) {
      this.body = result.body;
      this.headers = _ramda2.default.merge(this.headers, result.headers || {});
      this.status = result.status;
      this.eventListeners.load();
    }
    return this;
  };

  window.XMLHttpRequest.prototype.open = function (method, url, bool) {
    this.method = method.toLowerCase();
    this.url = url;
    this.realRequest.open.apply(this.realRequest, arguments);
    return this;
  };
}

function teardown() {
  window.XMLHttpRequest = cachedXMLHttpRequest;
}

function log(msg) {
  if (console && console.log) console.log('flyd-ajax/mock:', msg);
}

module.exports = { handle: handle, setup: setup, teardown: teardown };