mirror of https://github.com/tc39/test262.git
48 lines
1.3 KiB
JavaScript
48 lines
1.3 KiB
JavaScript
// Copyright (C) 2021 Alexey Shvayka. 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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esid: sec-object-initializer-runtime-semantics-propertydefinitionevaluation
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description: >
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Proxy's "getOwnPropertyDescriptor" trap is invoked for all keys.
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info: |
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PropertyDefinition : ... AssignmentExpression
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[...]
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3. Let excludedNames be a new empty List.
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4. Return ? CopyDataProperties(object, fromValue, excludedNames).
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CopyDataProperties ( target, source, excludedItems )
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[...]
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5. Let keys be ? from.[[OwnPropertyKeys]]().
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6. For each element nextKey of keys in List order, do
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[...]
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c. If excluded is false, then
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i. Let desc be ? from.[[GetOwnProperty]](nextKey).
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[[OwnPropertyKeys]] ( )
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[...]
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7. Let trapResultArray be ? Call(trap, handler, « target »).
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8. Let trapResult be ? CreateListFromArrayLike(trapResultArray, « String, Symbol »).
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[...]
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23. Return trapResult.
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features: [object-spread, Proxy, Symbol]
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includes: [compareArray.js]
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---*/
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var sym = Symbol();
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var getOwnKeys = [];
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var ownKeysResult = [sym, "foo", "0"];
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var proxy = new Proxy({}, {
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getOwnPropertyDescriptor: function(_target, key) {
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getOwnKeys.push(key);
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},
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ownKeys: function() {
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return ownKeysResult;
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},
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});
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({[sym]: 0, foo: 0, [0]: 0, ...proxy});
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assert.compareArray(getOwnKeys, ownKeysResult);
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