text: 'use strict';
  
  var create = require('../../../object/create')
  
    , getPrototypeOf = Object.getPrototypeOf;
  
  module.exports = function (t, a) {
  	var x = {}, y = {};
  
  	if (t === null) return;
  	a(t(x, y), x, "Return self object");
  	a(getPrototypeOf(x), y, "Object");
  	a.throws(function () { t(x); }, TypeError, "Undefined");
  	a.throws(function () { t('foo'); }, TypeError, "Primitive");
  	a(getPrototypeOf(t(x, null)), t.nullPolyfill || null, "Null");
  	x = create(null);
  	a.h1("Change null prototype");
  	a(t(x, y), x, "Result");
  	a(getPrototypeOf(x), y, "Prototype");
  	a.h1("Set null prototype");
  	a(t(y, null), y, "Result");
  	a(getPrototypeOf(y), t.nullPolyfill || null, "Prototype");
  };
  