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Viewing changes to js/src/tests/ecma_5/Array/length-truncate-nonconfigurable.js

  • Committer: Package Import Robot
  • Author(s): Tim Lunn
  • Date: 2014-02-11 21:55:34 UTC
  • Revision ID: package-import@ubuntu.com-20140211215534-m1zyq5aj59md3y07
Tags: upstream-24.2.0
Import upstream version 24.2.0

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js/src/tests/ecma_5/Array/length-truncate-nonconfigurable.js
 
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/*
 
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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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 * Contributor:
 
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 *   Jeff Walden <jwalden+code@mit.edu>
 
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 */
 
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//-----------------------------------------------------------------------------
 
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var BUGNUMBER = 858381;
 
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var summary =
 
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  "Array length redefinition behavior with non-configurable elements";
 
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print(BUGNUMBER + ": " + summary);
 
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/**************
 
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 * BEGIN TEST *
 
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 **************/
 
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var arr = [0, 1, 2];
 
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Object.defineProperty(arr, 1, { configurable: false });
 
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try
 
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{
 
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  Object.defineProperty(arr, "length", { value: 0, writable: false });
 
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}
 
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catch (e)
 
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{
 
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  assertEq(e instanceof TypeError, true,
 
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           "must throw TypeError when array truncation would have to remove " +
 
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           "non-configurable elements");
 
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}
 
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assertEq(arr.length, 2, "length is highest remaining index plus one");
 
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var desc = Object.getOwnPropertyDescriptor(arr, "length");
 
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assertEq(desc !== undefined, true);
 
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assertEq(desc.value, 2);
 
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assertEq(desc.writable, false);
 
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assertEq(desc.enumerable, false);
 
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assertEq(desc.configurable, 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");