c13dd2ece6
since it currently breaks WebKit bindings massively. R=mstarzinger@chromium.org BUG= TEST= Review URL: https://chromiumcodereview.appspot.com/10535007 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11714 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
67 lines
2.7 KiB
JavaScript
67 lines
2.7 KiB
JavaScript
// Copyright 2009 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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// Flags: --es5_readonly
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// According to ECMA-262, sections 8.6.2.2 and 8.6.2.3 you're not
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// allowed to override read-only properties, not even if the read-only
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// property is in the prototype chain.
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//
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// However, for compatibility with WebKit/JSC, we allow the overriding
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// of read-only properties in prototype chains.
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function F() {};
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F.prototype = Number;
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var original_number_max = Number.MAX_VALUE;
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// Assignment to a property which does not exist on the object itself,
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// but is read-only in a prototype does not take effect.
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var f = new F();
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assertEquals(original_number_max, f.MAX_VALUE);
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f.MAX_VALUE = 42;
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assertEquals(original_number_max, f.MAX_VALUE);
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// Assignment to a property which does not exist on the object itself,
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// but is read-only in a prototype does not take effect.
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f = new F();
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with (f) {
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MAX_VALUE = 42;
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}
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assertEquals(original_number_max, f.MAX_VALUE);
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// Assignment to read-only property on the object itself is ignored.
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Number.MAX_VALUE = 42;
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assertEquals(original_number_max, Number.MAX_VALUE);
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// G should be read-only on the global object and the assignment is
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// ignored.
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(function G() {
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eval("G = 42;");
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assertTrue(typeof G === 'function');
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})();
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