test262/test/language/expressions/compound-assignment/11.13.2-39-s.js

33 lines
876 B
JavaScript

// Copyright (c) 2012 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es5id: 11.13.2-39-s
description: >
Strict Mode - TypeError is thrown if The LeftHandSide of a
Compound Assignment operator(<<=) is a reference to an accessor
property with the attribute value {[[Set]]:undefined}
flags: [onlyStrict]
includes: [runTestCase.js]
---*/
function testcase() {
var obj = {};
Object.defineProperty(obj, "prop", {
get: function () {
return 11;
},
set: undefined,
enumerable: true,
configurable: true
});
try {
obj.prop <<= 20;
return false;
} catch (e) {
return e instanceof TypeError && obj.prop === 11;
}
}
runTestCase(testcase);