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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 2014 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
8 function TestBasics() {
9 var log = [];
10
11 var proxy = new Proxy({}, {
12 get: function(target, key) {
13 log.push("get " + String(key));
14 if (key === 'x') return 1;
15 },
16 has: function(target, key) {
17 log.push("has " + String(key));
18 if (key === 'x') return true;
19 return false;
20 }
21 });
22
23 var x = 'local';
24
25 with (proxy) {
26 assertEquals(1, x);
27 }
28
29 assertEquals(['has assertEquals', 'has x', 'get Symbol(Symbol.unscopables)',
30 'get x'], log);
31 }
32 TestBasics();
33
34
35 function TestInconsistent() {
36 var log = [];
37
38 var proxy = new Proxy({}, {
39 get: function(target, key) {
40 log.push("get " + String(key));
41 return undefined;
42 },
43 has: function(target, key) {
44 log.push("has " + String(key));
45 if (key === 'x') return true;
46 return false;
47 }
48 });
49
50 var x = 'local';
51
52 with (proxy) {
53 assertEquals(void 0, x);
54 }
55
56 assertEquals(['has assertEquals', 'has x', 'get Symbol(Symbol.unscopables)',
57 'get x'], log);
58 }
59 TestInconsistent();
60
61
62 function TestUseProxyAsUnscopables() {
63 var x = 1;
64 var object = {
65 x: 2
66 };
67 var calls = 0;
68 var proxy = new Proxy({}, {
69 has: function() {
70 assertUnreachable();
71 },
72 get: function(target, key) {
73 assertEquals('x', key);
74 calls++;
75 return calls === 2 ? true : undefined;
76 }
77 });
78
79 object[Symbol.unscopables] = proxy;
80
81 with (object) {
82 assertEquals(2, x);
83 assertEquals(1, x);
84 }
85
86 // HasBinding, HasBinding
87 assertEquals(2, calls);
88 }
89 TestUseProxyAsUnscopables();
90
91
92 function TestThrowInHasUnscopables() {
93 var x = 1;
94 var object = {
95 x: 2
96 };
97
98 function CustomError() {}
99
100 var calls = 0;
101 var proxy = new Proxy({}, {
102 has: function() {
103 assertUnreachable();
104 },
105 get: function(target, key) {
106 if (calls++ === 0) {
107 throw new CustomError();
108 }
109 assertUnreachable();
110 }
111 });
112
113 object[Symbol.unscopables] = proxy;
114
115 assertThrows(function() {
116 with (object) {
117 x;
118 }
119 }, CustomError);
120 }
121 TestThrowInHasUnscopables();
122
123
124 var global = this;
125 function TestGlobalShouldIgnoreUnscopables() {
126 global.x = 1;
127 var proxy = new Proxy({}, {
128 get: function() {
129 assertUnreachable();
130 },
131 has: function() {
132 assertUnreachable();
133 }
134 });
135 global[Symbol.unscopables] = proxy;
136
137 assertEquals(1, global.x);
138 assertEquals(1, x);
139
140 global.x = 2;
141 assertEquals(2, global.x);
142 assertEquals(2, x);
143
144 x = 3;
145 assertEquals(3, global.x);
146 assertEquals(3, x);
147 }
148 TestGlobalShouldIgnoreUnscopables();
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