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Diffstat (limited to '')
-rw-r--r-- | js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-18.js | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-18.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-18.js new file mode 100644 index 0000000000..bf8a2dc3ca --- /dev/null +++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-18.js @@ -0,0 +1,42 @@ +// Copyright (c) 2012 Ecma International. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. + +/*--- +info: | + Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method + of O to define the property. For non-configurable properties, step 11.a.i + of [[DefineOwnProperty]] rejects changing the setter if present. +es5id: 15.2.3.6-4-18 +description: > + Object.defineProperty throws TypeError when changing setter of + non-configurable accessor properties(8.12.9 step 11.a.i) +---*/ + +var o = {}; + +// create an accessor property; all other attributes default to false. +// dummy getter +var getter = function() { + return 1; +} +var d1 = { + get: getter +}; +Object.defineProperty(o, "foo", d1); + +// now, trying to change the setter should fail, since [[Configurable]] +// on the original property will be false. +var setter = function(x) {}; +var desc = { + set: setter +}; +assert.throws(TypeError, function() { + Object.defineProperty(o, "foo", desc); +}); +// the property should remain unchanged. +var d2 = Object.getOwnPropertyDescriptor(o, "foo"); +assert.sameValue(d2.get, getter, 'd2.get'); +assert.sameValue(d2.configurable, false, 'd2.configurable'); +assert.sameValue(d2.enumerable, false, 'd2.enumerable'); + +reportCompare(0, 0); |