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Viewing changes to js/src/tests/ecma_5/Date/equality-to-boolean.js

  • Committer: Package Import Robot
  • Author(s): Rico Tzschichholz
  • Date: 2013-05-25 12:24:23 UTC
  • Revision ID: package-import@ubuntu.com-20130525122423-zmxucrhtensw90xy
Tags: upstream-17.0.0
Import upstream version 17.0.0

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js/src/tests/ecma_5/Date/equality-to-boolean.js
 
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// Any copyright is dedicated to the Public Domain.
 
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// http://creativecommons.org/licenses/publicdomain/
 
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//-----------------------------------------------------------------------------
 
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print("Test for correct implementation of |Date == boolean| and vice versa");
 
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/**************
 
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 * BEGIN TEST *
 
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 **************/
 
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Date.prototype.toString = function() { return 1; };
 
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Date.prototype.valueOf = function() { return 0; };
 
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/*
 
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 * ES5 11.9.3 doesn't directly handle obj == boolean.  Instead it translates it
 
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 * as follows:
 
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 *
 
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 *   obj == boolean
 
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 *   ↳ obj == ToNumber(boolean), per step 7
 
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 *     ↳ ToPrimitive(obj) == ToNumber(boolean), per step 9
 
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 *
 
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 * ToPrimitive calls [[DefaultValue]] with no hint.  For Date objects this is
 
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 * treated as if it were instead called with hint String.  That calls toString,
 
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 * which returns 1, so Date objects here should compare equal to true and
 
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 * unequal to false.
 
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 */
 
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assertEq(new Date == true, true);
 
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assertEq(new Date == false, false);
 
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/* == is symmetric. */
 
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assertEq(true == new Date, true);
 
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assertEq(false == new Date, false);
 
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/******************************************************************************/
 
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if (typeof reportCompare === "function")
 
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  reportCompare(true, true);
 
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print("Tests complete");