react-page-objects/lib/extend.js

Page Object pattern for testing React components

var _ = require("underscore");

function extend(protoProps, staticProps) {
  var parent = this;
  var child;

  if (protoProps && _.has(protoProps, "constructor")) {
    child = protoProps.constructor;
  } else {
    child = function() {
      return parent.apply(this, arguments);
    };
  }

  _.extend(child, parent, staticProps);

  var Surrogate = function() {
    this.constructor = child;
  };

  Surrogate.prototype = parent.prototype;
  child.prototype = new Surrogate();

  if (protoProps) {
    _.extend(child.prototype, protoProps);
  }

  child.__super__ = parent.prototype;

  return child;
}

module.exports = extend;