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author | Ryan <ry@tinyclouds.org> | 2009-04-22 19:35:47 +0200 |
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committer | Ryan <ry@tinyclouds.org> | 2009-04-22 19:35:47 +0200 |
commit | 40c0f755c998d2615fe8466aab20c6d81bd463e7 (patch) | |
tree | 51fcb08ba1bd3f745ceb43fd5f814a5700079881 /deps/v8/test/mjsunit/override-read-only-property.js | |
parent | a93cf503073ba0258c55dec4dc325bdc1509b739 (diff) | |
download | android-node-v8-40c0f755c998d2615fe8466aab20c6d81bd463e7.tar.gz android-node-v8-40c0f755c998d2615fe8466aab20c6d81bd463e7.tar.bz2 android-node-v8-40c0f755c998d2615fe8466aab20c6d81bd463e7.zip |
import full versions of dependency libraries!
Diffstat (limited to 'deps/v8/test/mjsunit/override-read-only-property.js')
-rw-r--r-- | deps/v8/test/mjsunit/override-read-only-property.js | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/override-read-only-property.js b/deps/v8/test/mjsunit/override-read-only-property.js new file mode 100644 index 0000000000..b8fa5015a3 --- /dev/null +++ b/deps/v8/test/mjsunit/override-read-only-property.js @@ -0,0 +1,64 @@ +// Copyright 2009 the V8 project authors. All rights reserved. +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following +// disclaimer in the documentation and/or other materials provided +// with the distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived +// from this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// According to ECMA-262, sections 8.6.2.2 and 8.6.2.3 you're not +// allowed to override read-only properties, not even if the read-only +// property is in the prototype chain. +// +// However, for compatibility with WebKit/JSC, we allow the overriding +// of read-only properties in prototype chains. + +function F() {}; +F.prototype = Number; + +var original_number_max = Number.MAX_VALUE; + +// Assignment to a property which does not exist on the object itself, +// but is read-only in a prototype takes effect. +var f = new F(); +assertEquals(original_number_max, f.MAX_VALUE); +f.MAX_VALUE = 42; +assertEquals(42, f.MAX_VALUE); + +// Assignment to a property which does not exist on the object itself, +// but is read-only in a prototype takes effect. +f = new F(); +with (f) { + MAX_VALUE = 42; +} +assertEquals(42, f.MAX_VALUE); + +// Assignment to read-only property on the object itself is ignored. +Number.MAX_VALUE = 42; +assertEquals(original_number_max, Number.MAX_VALUE); + +// G should be read-only on the global object and the assignment is +// ignored. +(function G() { + eval("G = 42;"); + assertTrue(typeof G === 'function'); +})(); |