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/// Copyright (c) 2009 Microsoft Corporation
///
/// 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 Microsoft 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.
/**
* Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
* of O to define the property. Step 7b of [[DefineOwnProperty]] rejects if
* current.[[Enumerable]] and desc.[[Enumerable]] are the boolean negations
* of each other.
*
* @path ch15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-11.js
* @description Object.defineProperty throws TypeError when changing [[Enumerable]] from true to false on non-configurable accessor properties
*/
function testcase() {
var o = {};
// create an accessor property; all other attributes default to false.
// dummy getter
var getter = function () { return 1; }
var d1 = { get: getter, enumerable: true, configurable: false };
Object.defineProperty(o, "foo", d1);
// now, setting enumerable to true should fail, since [[Configurable]]
// on the original property will be false.
var desc = { get: getter, enumerable: false };
try {
Object.defineProperty(o, "foo", desc);
}
catch (e) {
if (e instanceof TypeError) {
// the property should remain unchanged.
var d2 = Object.getOwnPropertyDescriptor(o, "foo");
if (d2.get === getter &&
d2.enumerable === true &&
d2.configurable === false) {
return true;
}
}
}
}
runTestCase(testcase);
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