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7298a38552
sourceRevisionAtLastExport: 33f2fb0e53d135f0ee17cfccd9d993eb2a6f47de targetRevisionAtLastExport: 31340cbd9add103f586d501b0c3354b7b182abc0
78 lines
3.1 KiB
JavaScript
78 lines
3.1 KiB
JavaScript
// Copyright 2016 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax
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var symbol = %CreatePrivateSymbol("private");
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// Private symbols must never be listed.
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var object = {};
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object[symbol] = 42;
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for (var key of Object.keys(object)) assertUnreachable();
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for (var key of Object.getOwnPropertySymbols(object)) assertUnreachable();
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for (var key of Object.getOwnPropertyNames(object)) assertUnreachable();
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for (var key of Reflect.ownKeys(object)) assertUnreachable();
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for (var key in object) assertUnreachable();
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var object2 = {__proto__: object};
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for (var key of Object.keys(object2)) assertUnreachable();
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for (var key of Object.getOwnPropertySymbols(object2)) assertUnreachable();
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for (var key of Object.getOwnPropertyNames(object2)) assertUnreachable();
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for (var key of Reflect.ownKeys(object2)) assertUnreachable();
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for (var key in object2) assertUnreachable();
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// Private symbols must never leak to proxy traps.
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var proxy = new Proxy({}, new Proxy({}, {get() {return () => {
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throw new Error()}}}));
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var object = {__proto__: proxy};
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// [[Set]]
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assertEquals(42, proxy[symbol] = 42);
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assertThrows(function() { "use strict"; proxy[symbol] = 42 }, TypeError);
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assertEquals(false, Reflect.set(proxy, symbol, 42));
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assertEquals(42, object[symbol] = 42);
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assertEquals(43, (function() {"use strict"; return object[symbol] = 43})());
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assertEquals(true, Reflect.set(object, symbol, 44));
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// [[DefineOwnProperty]]
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assertEquals(false, Reflect.defineProperty(proxy, symbol, {}));
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assertThrows(() => Object.defineProperty(proxy, symbol, {}), TypeError);
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assertEquals(true, Reflect.defineProperty(object, symbol, {}));
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assertEquals(object, Object.defineProperty(object, symbol, {}));
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// [[Delete]]
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assertEquals(true, delete proxy[symbol]);
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assertEquals(true, (function() {"use strict"; return delete proxy[symbol]})());
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assertEquals(true, Reflect.deleteProperty(proxy, symbol));
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assertEquals(true, delete object[symbol]);
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assertEquals(true, (function() {"use strict"; return delete object[symbol]})());
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assertEquals(true, Reflect.deleteProperty(object, symbol));
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// [[GetOwnPropertyDescriptor]]
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assertEquals(undefined, Object.getOwnPropertyDescriptor(proxy, symbol));
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assertEquals(undefined, Reflect.getOwnPropertyDescriptor(proxy, symbol));
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assertFalse(Object.prototype.hasOwnProperty.call(proxy, symbol));
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assertEquals(undefined, Object.getOwnPropertyDescriptor(object, symbol));
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assertEquals(undefined, Reflect.getOwnPropertyDescriptor(object, symbol));
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assertFalse(Object.prototype.hasOwnProperty.call(object, symbol));
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// [[Has]]
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assertFalse(symbol in proxy);
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assertFalse(Reflect.has(proxy, symbol));
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assertFalse(symbol in object);
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assertFalse(Reflect.has(object, symbol));
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// [[Get]]
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assertEquals(undefined, proxy[symbol]);
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assertEquals(undefined, Reflect.get(proxy, symbol));
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assertEquals(undefined, Reflect.get(proxy, symbol, 42));
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assertEquals(undefined, object[symbol]);
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assertEquals(undefined, Reflect.get(object, symbol));
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assertEquals(undefined, Reflect.get(object, symbol, 42));
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