third_party/WebKit/LayoutTests/fast/js/mozilla/strict/script-tests/15.4.5.1.js

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2
   3 /*
   4  * Any copyright is dedicated to the Public Domain.
   5  * http://creativecommons.org/licenses/publicdomain/
   6  */
   7
   8 function arr() {
   9   return Object.defineProperty([1, 2, 3, 4], 2, {configurable: false});
  10 }
  11
  12 assertEq(testLenientAndStrict('var a = arr(); a.length = 2; a',
  13                               returnsCopyOf([1, 2, 3]),
  14                               raisesException(TypeError)),
  15          true);
  16
  17 // Internally, SpiderMonkey has two representations for arrays:
  18 // fast-but-inflexible, and slow-but-flexible. Adding a non-index property
  19 // to an array turns it into the latter. We should test on both kinds.
  20 function addx(obj) {
  21   obj.x = 5;
  22   return obj;
  23 }
  24
  25 assertEq(testLenientAndStrict('var a = addx(arr()); a.length = 2; a',
  26                               returnsCopyOf(addx([1, 2, 3])),
  27                               raisesException(TypeError)),
  28          true);
  29
  30 reportCompare(true, true);
  31
  32 var successfullyParsed = true;