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Issue 1815773002: Remove runtime flags for Proxy and Reflect (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Rebased Created 4 years, 9 months ago
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1 // Copyright 2015 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Flags: --harmony-proxies
6
7 var target = {
8 "target_one": 1
9 };
10 target.__proto__ = {
11 "target_two": 2
12 };
13 var handler = {
14 has: function(target, name) {
15 return name == "present";
16 }
17 }
18
19 var proxy = new Proxy(target, handler);
20
21 // Test simple cases.
22 assertTrue("present" in proxy);
23 assertFalse("nonpresent" in proxy);
24
25 // Test interesting algorithm steps:
26
27 // Step 7: Fall through to target if trap is undefined.
28 handler.has = undefined;
29 assertTrue("target_one" in proxy);
30 assertTrue("target_two" in proxy);
31 assertFalse("in_your_dreams" in proxy);
32
33 // Step 8: Result is converted to boolean.
34 var result = 1;
35 handler.has = function(t, n) { return result; }
36 assertTrue("foo" in proxy);
37 result = {};
38 assertTrue("foo" in proxy);
39 result = undefined;
40 assertFalse("foo" in proxy);
41 result = "string";
42 assertTrue("foo" in proxy);
43
44 // Step 9b i. Trap result must confirm presence of non-configurable properties
45 // of the target.
46 Object.defineProperty(target, "nonconf", {value: 1, configurable: false});
47 result = false;
48 assertThrows("'nonconf' in proxy", TypeError);
49
50 // Step 9b iii. Trap result must confirm presence of all own properties of
51 // non-extensible targets.
52 Object.preventExtensions(target);
53 assertThrows("'nonconf' in proxy", TypeError);
54 assertThrows("'target_one' in proxy", TypeError);
55 assertFalse("target_two" in proxy);
56 assertFalse("in_your_dreams" in proxy);
57
58 // Regression test for crbug.com/570120 (stray JSObject::cast).
59 (function TestHasPropertyFastPath() {
60 var proxy = new Proxy({}, {});
61 var object = Object.create(proxy);
62 object.hasOwnProperty(0);
63 })();
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