| // Copyright (C) 2015 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| es6id: 26.1.13 |
| description: > |
| Return false if target is not writable. |
| info: | |
| 26.1.13 Reflect.set ( target, propertyKey, V [ , receiver ] ) |
| |
| ... |
| 4. If receiver is not present, then |
| a. Let receiver be target. |
| 5. Return target.[[Set]](key, V, receiver). |
| |
| 9.1.9 [[Set]] ( P, V, Receiver) |
| |
| ... |
| 5. If IsDataDescriptor(ownDesc) is true, then |
| a. If ownDesc.[[Writable]] is false, return false. |
| b. If Type(Receiver) is not Object, return false. |
| c. Let existingDescriptor be Receiver.[[GetOwnProperty]](P). |
| d. ReturnIfAbrupt(existingDescriptor). |
| e. If existingDescriptor is not undefined, then |
| i. If IsAccessorDescriptor(existingDescriptor) is true, return false. |
| ii. If existingDescriptor.[[Writable]] is false, return false. |
| ... |
| features: [Reflect, Reflect.set] |
| ---*/ |
| |
| var o1 = {}; |
| var receiver = {}; |
| Object.defineProperty(receiver, 'p', { |
| writable: false, |
| value: 42 |
| }); |
| var result = Reflect.set(o1, 'p', 43, receiver); |
| assert.sameValue(result, false, 'returns false'); |
| assert.sameValue(receiver.p, 42, 'does not set a new value on receiver'); |
| assert.sameValue( |
| o1.hasOwnProperty('p'), false, |
| 'does not set a new value on target' |
| ); |