mirror of https://github.com/tc39/test262.git
69 lines
2.0 KiB
JavaScript
69 lines
2.0 KiB
JavaScript
|
// Copyright (C) 2016 the V8 project authors. All rights reserved.
|
||
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
||
|
|
/*---
|
||
|
|
esid: sec-ordinary-object-internal-methods-and-internal-slots-defineownproperty-p-desc
|
||
|
|
description: >
|
||
|
|
Replaces value field even if they pass in the SameValue algorithm, including
|
||
|
|
distinct NaN values
|
||
|
|
info: |
|
||
|
|
This test does not compare the actual byte values, instead it simply checks that
|
||
|
|
the value is some valid NaN encoding.
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
Previously, this test compared the "value" field using the SameValue
|
||
|
|
algorithm (thereby ignoring distinct NaN values)
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
[[DefineOwnProperty]] (P, Desc)
|
||
|
|
|
||
|
|
Return ? OrdinaryDefineOwnProperty(O, P, Desc).
|
||
|
|
|
||
|
|
#sec-ordinarydefineownproperty
|
||
|
|
OrdinaryDefineOwnProperty ( O, P, Desc )
|
||
|
|
|
||
|
|
1. Let current be ? O.[[GetOwnProperty]](P).
|
||
|
|
2. Let extensible be O.[[Extensible]].
|
||
|
|
3. Return ValidateAndApplyPropertyDescriptor(O, P, extensible, Desc,
|
||
|
|
current).
|
||
|
|
|
||
|
|
#sec-validateandapplypropertydescriptor
|
||
|
|
ValidateAndApplyPropertyDescriptor ( O, P, extensible, Desc, current )
|
||
|
|
|
||
|
|
...
|
||
|
|
7. Else if IsDataDescriptor(current) and IsDataDescriptor(Desc) are both true,
|
||
|
|
then
|
||
|
|
a. If current.[[Configurable]] is false and current.[[Writable]] is false,
|
||
|
|
then
|
||
|
|
...
|
||
|
|
...
|
||
|
|
9. If O is not undefined, then
|
||
|
|
a. For each field of Desc that is present, set the corresponding attribute
|
||
|
|
of the property named P of object O to the value of the field.
|
||
|
|
10. Return true.
|
||
|
|
|
||
|
|
#sec-isnan-number
|
||
|
|
|
||
|
|
NOTE: A reliable way for ECMAScript code to test if a value X is a NaN is
|
||
|
|
an expression of the form X !== X. The result will be true if and only
|
||
|
|
if X is a NaN.
|
||
|
|
includes: [nans.js]
|
||
|
|
---*/
|
||
|
|
|
||
|
|
var len = NaNs.length;
|
||
|
|
|
||
|
|
for (var idx = 0; idx < len; ++idx) {
|
||
|
|
for (var jdx = 0; jdx < len; ++jdx) {
|
||
|
|
var a = {};
|
||
|
|
|
||
|
|
a.prop = NaNs[idx]();
|
||
|
|
a.prop = NaNs[jdx]();
|
||
|
|
|
||
|
|
assert(
|
||
|
|
a.prop !== a.prop,
|
||
|
|
`Object property value reassigned to NaN produced by (${NaNs[idx].toString()}) results in a valid NaN`
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|