diff options
Diffstat (limited to 'js/src/tests/test262/built-ins/Object/internals/DefineOwnProperty/consistent-value-function-arguments.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Object/internals/DefineOwnProperty/consistent-value-function-arguments.js | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Object/internals/DefineOwnProperty/consistent-value-function-arguments.js b/js/src/tests/test262/built-ins/Object/internals/DefineOwnProperty/consistent-value-function-arguments.js new file mode 100644 index 0000000000..4497384698 --- /dev/null +++ b/js/src/tests/test262/built-ins/Object/internals/DefineOwnProperty/consistent-value-function-arguments.js @@ -0,0 +1,35 @@ +// Copyright (C) 2017 Claude Pache. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +esid: sec-invariants-of-the-essential-internal-methods +description: > + Value of non-writable, non-configurable data property must not change + ("arguments" property of a non-strict function) +info: | + [[GetOwnProperty]] (P) + [...] + - If a property P is described as a data property with Desc.[[Value]] equal + to v and Desc.[[Writable]] and Desc.[[Configurable]] are both false, then + the SameValue must be returned for the Desc.[[Value]] attribute of the + property on all future calls to [[GetOwnProperty]] ( P ). + [...] + (This invariant was violated for the specific property under test by a number + of implementations as of January 2017.) +---*/ + +function f() { + return Reflect.getOwnPropertyDescriptor(f, 'arguments'); +} + +Reflect.defineProperty(f, 'arguments', { + writable: false, + configurable: false +}); + +var desc = Reflect.getOwnPropertyDescriptor(f, 'arguments'); +if (desc && desc.configurable === false && desc.writable === false) { + var desc2 = f(); + assert.sameValue(desc.value, desc2.value); +} + +reportCompare(0, 0); |