02490829dd
The delete operator always return true in case of indexed property. It should return false if an indexed property can't be deleted (eg. DontDelete attribute is set or a string object is the holder). Contributed by Peter Varga <pvarga@inf.u-szeged.hu> BUG=none TEST=mjsunit/delete-non-configurable Review URL: https://codereview.chromium.org/11094021 Patch from Peter Varga <pvarga@inf.u-szeged.hu>. git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12736 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
75 lines
2.9 KiB
JavaScript
75 lines
2.9 KiB
JavaScript
// Copyright 2012 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Delete elements of a String object.
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var TIPLI = "tipli"
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var so = new String(TIPLI);
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var length = so.length;
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for (var i = 0; i < length; i++) {
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assertFalse(delete so[i]);
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assertThrows("'use strict'; delete so[i];", TypeError);
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assertFalse(delete so[i.toString()]);
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assertThrows("'use strict'; delete so[i.toString()];", TypeError);
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}
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assertEquals(length, so.length);
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assertEquals(new String(TIPLI), so);
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// Delete elements of an Array.
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var arr = new Array(length);
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for (var i = 0; i < length; i++) {
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arr[i] = i;
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Object.defineProperty(arr, i, { configurable: false });
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}
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for (var i = 0; i < length; i++) {
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assertFalse(delete arr[i]);
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assertThrows("'use strict'; delete arr[i];", TypeError);
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assertFalse(delete arr[i.toString()]);
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assertThrows("'use strict'; delete arr[i.toString()];", TypeError);
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assertEquals(i, arr[i]);
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}
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assertEquals(length, arr.length);
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assertTrue(delete arr[length]);
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// Delete an element of an Object.
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var INDEX = 28;
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var obj = new Object();
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obj[INDEX] = TIPLI;
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Object.defineProperty(obj, INDEX, { configurable: false });
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assertFalse(delete obj[INDEX]);
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assertThrows("'use strict'; delete obj[INDEX];", TypeError);
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assertFalse(delete obj[INDEX.toString()]);
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assertThrows("'use strict'; delete obj[INDEX.toString()];", TypeError);
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assertEquals(TIPLI, obj[INDEX]);
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assertTrue(delete arr[INDEX+1]);
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