Cart.js

'user strict';

var Cart = {};

(function($){

  if (Cart) {
    jQuery.extend(Cart, {
      config: function(config) {
        if (!this.config) {
          this.config = config;
        } else {
          jQuery.extend(this.config, config);
        }
        return Cart.refresh().done(function(){
          console.log(Cart);
          return Cart;
        });
      },
      addItem: function(options) {
        console.log(this.config);
        return jQuery.ajax({
          url: this.config.baseUrl + "/api/rest/cart/items",
          contentType: "application/json; charset=utf-8",
          method: "POST",
          data: JSON.stringify(options),
          dataType: "json",
          context: Cart,
          xhrFields: {
            withCredentials: true
          },
          headers: this.config.defaults.headers
        }).then(function(data, textStatus, jqXHR){
          return Cart;
        }, Cart.errorHandler);
      },
      refresh: function() {
        return jQuery.ajax({
          url: this.config.baseUrl + "/api/rest/cart",
          method: "GET",
          dataType: "json",
          context: Cart,
          xhrFields: {
            withCredentials: true
          }
        }).then(function(data,textStatus, jqXHR){
          console.log(data);
          jQuery.extend(Cart, data);
          return Cart;
        });
      },
      removeItem: function(options) {
        console.log(options);
      },
      responseHandler: function(data, textStatus, jqXHR){
        console.log("responseHandler");
        var cookie = jqXHR.getResponseHeader("Set-Cookie");
        console.log(cookie);
        jQuery.extend(this, data);
        console.log(this)
        return Cart;
      },
      errorHandler: function(jqxhr, textStatus, errorThrown) {
        try {
          var error = JSON.parse(jqxhr.responseText);
          console.log(error);
          var message = "";
          $.each(error.messages.error, function (key, value) {
            message = message + value.message + "\n";
          });
          Cart.displayMessage(false, message);
        } catch(e) {
          console.log(e);
        }
      },
      redirectHandler: function(jqXHR, textStatus, errorThrown) {
        console.log("redirect");
        var cookie = jqXHR.getResponseHeader("Set-Cookie");
        console.log(cookie);
        return Cart;
      },
      displayMessage: function(message) {
        console.log(message);
      }
    });
  }

}(jQuery))


  (function($){
    var config = YAML.load("tests/config/en_us.local.yml");
    Cart
      .config(config.magento_config);
    Cart
      .addItem({ "sku": "000-00023" });
    Cart
      .addItem({"sku": "000-00002"})
    Cart
      .refresh();
    console.log(Cart);
  })(jQuery);

First two addItem calls both have set-cookie in the response. Second call does not return the first's cookie. Second does not add the second cookie.

On refresh there's nothing in the cart.