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c8daa32e48
* Test object spread with Proxy * Test object spread with non-enumerable keys and Proxy * Test object rest with excluded keys and Proxy * Test object rest with non-enumerable keys and Proxy
72 lines
2.6 KiB
JavaScript
72 lines
2.6 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 "get" trap is not invoked for non-enumerable 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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ii. If desc is not undefined and desc.[[Enumerable]] is true, then
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1. Let propValue be ? Get(from, nextKey).
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2. Perform ! CreateDataPropertyOrThrow(target, nextKey, propValue).
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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, propertyHelper.js]
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---*/
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var VALUE_LITERAL = "VALUE_LITERAL";
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var VALUE_GOPD = "VALUE_GOPD";
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var VALUE_GET = "VALUE_GET";
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var dontEnumSymbol = Symbol("dont_enum_symbol");
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var enumerableSymbol = Symbol("enumerable_symbol");
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var dontEnumKeys = [dontEnumSymbol, "dontEnumString", "0"];
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var enumerableKeys = [enumerableSymbol, "enumerableString", "1"];
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var ownKeysResult = [...dontEnumKeys, ...enumerableKeys];
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var getOwnKeys = [];
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var getKeys = [];
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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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var isEnumerable = enumerableKeys.indexOf(key) !== -1;
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return {value: VALUE_GOPD, writable: false, enumerable: isEnumerable, configurable: true};
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},
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get: function(_target, key) {
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getKeys.push(key);
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return VALUE_GET;
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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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var result = {[enumerableSymbol]: VALUE_LITERAL, enumerableString: VALUE_LITERAL, [1]: VALUE_LITERAL, ...proxy};
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assert.compareArray(getOwnKeys, ownKeysResult);
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assert.compareArray(getKeys, enumerableKeys);
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verifyProperty(result, enumerableSymbol, {value: VALUE_GET, writable: true, enumerable: true, configurable: true});
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verifyProperty(result, "enumerableString", {value: VALUE_GET, writable: true, enumerable: true, configurable: true});
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verifyProperty(result, "1", {value: VALUE_GET, writable: true, enumerable: true, configurable: true});
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