221e54ddbc
Bug: v8:6664, v8:6557 Change-Id: Ib2180e38c8b07cda102ccb160dfd44197d828be0 Reviewed-on: https://chromium-review.googlesource.com/602229 Commit-Queue: Maya Lekova <mslekova@google.com> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Cr-Commit-Position: refs/heads/master@{#47372}
127 lines
2.9 KiB
JavaScript
127 lines
2.9 KiB
JavaScript
// Copyright 2015 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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var target = {
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"target_one": 1
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};
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target[0] = 42;
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target.__proto__ = {
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"target_two": 2
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};
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var handler = {
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has: function(target, name) {
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return name == "present" || name == '0';
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}
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}
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var proxy = new Proxy(target, handler);
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// Test simple cases.
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assertTrue("present" in proxy);
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assertFalse("nonpresent" in proxy);
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// Test element cases.
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assertTrue(0 in proxy);
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assertFalse(1 in proxy);
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assertTrue('0' in proxy);
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assertFalse('1' in proxy);
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var symbol0 = {
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[Symbol.toPrimitive](hint) {
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return 0;
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}
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};
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var symbol1 = {
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[Symbol.toPrimitive](hint) {
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return 1;
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}
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};
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assertTrue(symbol0 in proxy);
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assertFalse(symbol1 in proxy);
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// Test interesting algorithm steps:
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// Step 7: Fall through to target if trap is undefined.
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handler.has = undefined;
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assertTrue("target_one" in proxy);
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assertTrue("target_two" in proxy);
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assertFalse("in_your_dreams" in proxy);
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// Step 8: Result is converted to boolean.
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var result = 1;
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handler.has = function(t, n) { return result; }
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assertTrue("foo" in proxy);
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result = {};
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assertTrue("foo" in proxy);
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result = undefined;
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assertFalse("foo" in proxy);
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result = "string";
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assertTrue("foo" in proxy);
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// Step 9b i. Trap result must confirm presence of non-configurable properties
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// of the target.
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Object.defineProperty(target, "nonconf", {value: 1, configurable: false});
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result = false;
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assertThrows("'nonconf' in proxy", TypeError);
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// Step 9b iii. Trap result must confirm presence of all own properties of
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// non-extensible targets.
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Object.preventExtensions(target);
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assertThrows("'nonconf' in proxy", TypeError);
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assertThrows("'target_one' in proxy", TypeError);
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assertFalse("target_two" in proxy);
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assertFalse("in_your_dreams" in proxy);
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// Regression test for crbug.com/570120 (stray JSObject::cast).
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(function TestHasPropertyFastPath() {
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var proxy = new Proxy({}, {});
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var object = Object.create(proxy);
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object.hasOwnProperty(0);
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})();
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(function FalseTargetPropExists() {
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var target2 = {
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attr: 1
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};
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var p = new Proxy(target2, {
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has: function(t, prop) {
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return false;
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}
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});
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assertFalse("attr" in p);
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})();
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(function TargetHasAccessorProperty() {
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var target = {};
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Object.defineProperty(target, 'prop', {
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get: function() {
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assertSame(this, target);
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return 42;
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},
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configurable: true
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})
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var proxy = new Proxy(target, {
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has: function(t, prop) {
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return false;
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},
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});
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assertFalse('prop' in proxy);
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})();
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(function TargetHasNonConfigurableProperty() {
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var target = {};
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Object.defineProperty(target, 'prop', {
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value: 42,
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configurable: false,
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writable: true
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})
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var proxy = new Proxy(target, {
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has: function(t, prop) {
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return false;
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},
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});
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assertThrows(function() { 'prop' in proxy; }, TypeError);
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})();
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