// Copyright 2009 the Sputnik authors.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
info: Operator x | y returns ToNumber(x) | ToNumber(y)
es5id: 11.10.3_A3_T1.5
description: Type(x) and Type(y) vary between Object object and Function object
---*/

//CHECK#1
if (({} | function(){return 1}) !== 0) {
  $ERROR('#1: ({} | function(){return 1}) === 0. Actual: ' + (({} | function(){return 1})));
}

//CHECK#2
if ((function(){return 1} | {}) !== 0) {
  $ERROR('#2: (function(){return 1} | {}) === 0. Actual: ' + ((function(){return 1} | {})));
}

//CHECK#3
if ((function(){return 1} | function(){return 1}) !== 0) {
  $ERROR('#3: (function(){return 1} | function(){return 1}) === 0. Actual: ' + ((function(){return 1} | function(){return 1})));
}

//CHECK#4
if (({} | {}) !== 0) {
  $ERROR('#4: ({} | {}) === 0. Actual: ' + (({} | {})));
}
