249bf75e0c
Both of them shipped in Chrome 49 without incident. Also move relevant tests from harmony/ to es6/. Review URL: https://codereview.chromium.org/1815773002 Cr-Commit-Position: refs/heads/master@{#34964}
62 lines
1.7 KiB
JavaScript
62 lines
1.7 KiB
JavaScript
// Copyright 2015 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
var target = {
|
|
"target_one": 1
|
|
};
|
|
target.__proto__ = {
|
|
"target_two": 2
|
|
};
|
|
var handler = {
|
|
has: function(target, name) {
|
|
return name == "present";
|
|
}
|
|
}
|
|
|
|
var proxy = new Proxy(target, handler);
|
|
|
|
// Test simple cases.
|
|
assertTrue("present" in proxy);
|
|
assertFalse("nonpresent" in proxy);
|
|
|
|
// Test interesting algorithm steps:
|
|
|
|
// Step 7: Fall through to target if trap is undefined.
|
|
handler.has = undefined;
|
|
assertTrue("target_one" in proxy);
|
|
assertTrue("target_two" in proxy);
|
|
assertFalse("in_your_dreams" in proxy);
|
|
|
|
// Step 8: Result is converted to boolean.
|
|
var result = 1;
|
|
handler.has = function(t, n) { return result; }
|
|
assertTrue("foo" in proxy);
|
|
result = {};
|
|
assertTrue("foo" in proxy);
|
|
result = undefined;
|
|
assertFalse("foo" in proxy);
|
|
result = "string";
|
|
assertTrue("foo" in proxy);
|
|
|
|
// Step 9b i. Trap result must confirm presence of non-configurable properties
|
|
// of the target.
|
|
Object.defineProperty(target, "nonconf", {value: 1, configurable: false});
|
|
result = false;
|
|
assertThrows("'nonconf' in proxy", TypeError);
|
|
|
|
// Step 9b iii. Trap result must confirm presence of all own properties of
|
|
// non-extensible targets.
|
|
Object.preventExtensions(target);
|
|
assertThrows("'nonconf' in proxy", TypeError);
|
|
assertThrows("'target_one' in proxy", TypeError);
|
|
assertFalse("target_two" in proxy);
|
|
assertFalse("in_your_dreams" in proxy);
|
|
|
|
// Regression test for crbug.com/570120 (stray JSObject::cast).
|
|
(function TestHasPropertyFastPath() {
|
|
var proxy = new Proxy({}, {});
|
|
var object = Object.create(proxy);
|
|
object.hasOwnProperty(0);
|
|
})();
|