mirror of https://github.com/tc39/test262.git
79 lines
2.6 KiB
JavaScript
79 lines
2.6 KiB
JavaScript
// Copyright (C) 2015 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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es6id: 26.1.13
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description: >
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Creates a property data descriptor.
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info: >
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26.1.13 Reflect.set ( target, propertyKey, V [ , receiver ] )
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...
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4. If receiver is not present, then
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a. Let receiver be target.
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5. Return target.[[Set]](key, V, receiver).
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9.1.9 [[Set]] ( P, V, Receiver)
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...
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4. If ownDesc is undefined, then
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a. Let parent be O.[[GetPrototypeOf]]().
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b. ReturnIfAbrupt(parent).
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c. If parent is not null, then
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i. Return parent.[[Set]](P, V, Receiver).
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d. Else,
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ii. Let ownDesc be the PropertyDescriptor{[[Value]]: undefined,
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[[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}.
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5. If IsDataDescriptor(ownDesc) is true, then
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a. If ownDesc.[[Writable]] is false, return false.
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b. If Type(Receiver) is not Object, return false.
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c. Let existingDescriptor be Receiver.[[GetOwnProperty]](P).
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d. ReturnIfAbrupt(existingDescriptor).
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e. If existingDescriptor is not undefined, then
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i. If IsAccessorDescriptor(existingDescriptor) is true, return false.
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ii. If existingDescriptor.[[Writable]] is false, return false.
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iii. Let valueDesc be the PropertyDescriptor{[[Value]]: V}.
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iv. Return Receiver.[[DefineOwnProperty]](P, valueDesc).
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f. Else Receiver does not currently have a property P,
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i. Return CreateDataProperty(Receiver, P, V).
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6. Assert: IsAccessorDescriptor(ownDesc) is true.
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7. Let setter be ownDesc.[[Set]].
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8. If setter is undefined, return false.
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...
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11. Return true.
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includes: [propertyHelper.js]
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---*/
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var o1 = {};
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var result = Reflect.set(o1, 'p', 42);
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assert.sameValue(result, true, 'returns true on a successful setting');
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var desc = Object.getOwnPropertyDescriptor(o1, 'p');
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assert.sameValue(
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desc.value, 42,
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'sets a data descriptor to set a new property'
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);
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verifyWritable(o1, 'p');
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verifyEnumerable(o1, 'p');
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verifyConfigurable(o1, 'p');
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var o2 = {};
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var receiver = {};
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result = Reflect.set(o2, 'p', 43, receiver);
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assert.sameValue(
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result, true,
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'returns true on a successful setting with a receiver'
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);
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desc = Object.getOwnPropertyDescriptor(o2, 'p');
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assert.sameValue(
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desc, undefined,
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'does not set a data descriptor on target if receiver is given'
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);
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desc = Object.getOwnPropertyDescriptor(receiver, 'p');
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assert.sameValue(
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desc.value, 43,
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'sets a data descriptor on the receiver object to set a new property'
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);
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verifyWritable(receiver, 'p');
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verifyEnumerable(receiver, 'p');
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verifyConfigurable(receiver, 'p');
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