JSTests/test262/test/language/statements/if/S12.5_A1.1_T2.js

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

/*---
info: |
    0, null, undefined, false, empty string, NaN in expression is evaluated
    to false
es5id: 12.5_A1.1_T2
description: Using "if/else" construction
---*/

var c=0;
//////////////////////////////////////////////////////////////////////////////
//CHECK#1
if(0)
	throw new Test262Error('#1.1: 0 in expression is evaluated to false ');
else
  c++;
if (c!=1) throw new Test262Error('#1.2: else branch don`t execute');
//
//////////////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////////////
//CHECK#2
if(false)
    throw new Test262Error('#2.1: false in expression is evaluated to false ');
else
  c++;
if (c!=2) throw new Test262Error('#2.2: else branch don`t execute');
//
//////////////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////////////
//CHECK#3
if(null)
	throw new Test262Error('#3.1: null in expression is evaluated to false ');
else
  c++;
if (c!=3) throw new Test262Error('#3.2: else branch don`t execute');
//
//////////////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////////////
//CHECK#4
if(undefined)
	throw new Test262Error('#4.1: undefined in expression is evaluated to false ');
else
  c++;
if (c!=4) throw new Test262Error('#4.2: else branch don`t execute');
//
//////////////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////////////
//CHECK#5
if("")
    throw new Test262Error('#5.1: empty string in expression is evaluated to false ');
else
  c++;
if (c!=5) throw new Test262Error('#5.2: else branch don`t execute');
//
//////////////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////////////
//CHECK#6
if(NaN)
    throw new Test262Error('#6.1: NaN in expression is evaluated to false ');
else
  c++;
if (c!=6) throw new Test262Error('#6.2: else branch don`t execute');
//
//////////////////////////////////////////////////////////////////////////////