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46 lines
1.2 KiB
JavaScript
46 lines
1.2 KiB
JavaScript
// Copyright (C) 2020 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.entries
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description: >
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Property names are returned in ascending chronological order of creation
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that is unaffected by [[DefineOwnProperty]].
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info: |
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Object.entries ( O )
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[...]
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2. Let nameList be ? EnumerableOwnPropertyNames(obj, key+value).
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3. Return CreateArrayFromList(nameList).
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EnumerableOwnPropertyNames ( O, kind )
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[...]
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2. Let ownKeys be ? O.[[OwnPropertyKeys]]().
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[...]
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OrdinaryOwnPropertyKeys ( O )
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[...]
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3. For each own property key P of O that is a String but is not an array index,
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in ascending chronological order of property creation, do
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a. Add P as the last element of keys.
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[...]
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5. Return keys.
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features: [arrow-function]
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includes: [compareArray.js]
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---*/
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var obj = {};
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obj.a = 1;
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obj.b = 2;
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Object.defineProperty(obj, "a", {writable: false});
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var objKeys = Object.entries(obj).map(e => e[0]);
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assert.compareArray(objKeys, ["a", "b"]);
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var fn = () => {};
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fn.a = 1;
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Object.defineProperty(fn, "name", {enumerable: true});
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var fnKeys = Object.entries(fn).map(e => e[0]);
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assert.compareArray(fnKeys, ["name", "a"]);
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