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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: 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 --harmony-reflect
6
7 // Tests the interaction of Function.prototype.bind with proxies.
8
9
10 // (Helper)
11
12 var log = [];
13 var logger = {};
14 var handler = new Proxy({}, logger);
15
16 logger.get = function(t, trap, r) {
17 return function() {
18 log.push([trap, ...arguments]);
19 return Reflect[trap](...arguments);
20 }
21 };
22
23
24 // Simple case
25
26 var target = function(a, b, c) { "use strict"; return this };
27 var proxy = new Proxy(target, handler);
28 var this_value = Symbol();
29
30 log.length = 0;
31 result = Function.prototype.bind.call(proxy, this_value, "foo");
32 assertEquals(2, result.length);
33 assertEquals(target.__proto__, result.__proto__);
34 assertEquals(this_value, result());
35 assertEquals(5, log.length);
36 for (var i in log) assertSame(target, log[i][1]);
37 assertEquals(["getPrototypeOf", target], log[0]);
38 assertEquals(["getOwnPropertyDescriptor", target, "length"], log[1]);
39 assertEquals(["get", target, "length", proxy], log[2]);
40 assertEquals(["get", target, "name", proxy], log[3]);
41 assertEquals(["apply", target, this_value, ["foo"]], log[4]);
42 assertEquals(new target(), new result());
43
44
45 // Custom prototype
46
47 log.length = 0;
48 target.__proto__ = {radio: "gaga"};
49 result = Function.prototype.bind.call(proxy, this_value, "foo");
50 assertEquals(2, result.length);
51 assertSame(target.__proto__, result.__proto__);
52 assertEquals(this_value, result());
53 assertEquals(5, log.length);
54 for (var i in log) assertSame(target, log[i][1]);
55 assertEquals(["getPrototypeOf", target], log[0]);
56 assertEquals(["getOwnPropertyDescriptor", target, "length"], log[1]);
57 assertEquals(["get", target, "length", proxy], log[2]);
58 assertEquals(["get", target, "name", proxy], log[3]);
59 assertEquals(["apply", target, this_value, ["foo"]], log[4]);
60
61
62 // Custom length
63
64 handler = {
65 get() {return 42},
66 getOwnPropertyDescriptor() {return {configurable: true}}
67 };
68 proxy = new Proxy(target, handler);
69
70 result = Function.prototype.bind.call(proxy, this_value, "foo");
71 assertEquals(41, result.length);
72 assertEquals(this_value, result());
73
74
75 // Long length
76
77 handler = {
78 get() {return Math.pow(2, 100)},
79 getOwnPropertyDescriptor() {return {configurable: true}}
80 };
81 proxy = new Proxy(target, handler);
82
83 result = Function.prototype.bind.call(proxy, this_value, "foo");
84 assertEquals(Math.pow(2, 100) - 1, result.length);
85 assertEquals(this_value, result());
86
87
88 // Very long length
89
90 handler = {
91 get() {return 1/0},
92 getOwnPropertyDescriptor() {return {configurable: true}}
93 };
94 proxy = new Proxy(target, handler);
95
96 result = Function.prototype.bind.call(proxy, this_value, "foo");
97 assertEquals(1/0, result.length);
98 assertEquals(this_value, result());
99
100
101 // Non-integer length
102
103 handler = {
104 get() {return 4.2},
105 getOwnPropertyDescriptor() {return {configurable: true}}
106 };
107 proxy = new Proxy(target, handler);
108
109 result = Function.prototype.bind.call(proxy, this_value, "foo");
110 assertEquals(3, result.length);
111 assertEquals(this_value, result());
112
113
114 // Undefined length
115
116 handler = {
117 get() {},
118 getOwnPropertyDescriptor() {return {configurable: true}}
119 };
120 proxy = new Proxy(target, handler);
121
122 result = Function.prototype.bind.call(proxy, this_value, "foo");
123 assertEquals(0, result.length);
124 assertEquals(this_value, result());
125
126
127 // Non-callable
128
129 assertThrows(() => Function.prototype.bind.call(new Proxy({}, {})), TypeError);
130 assertThrows(() => Function.prototype.bind.call(new Proxy([], {})), TypeError);
131
132
133 // Non-constructable
134
135 result = Function.prototype.bind.call(() => 42, this_value, "foo");
136 assertEquals(42, result());
137 assertThrows(() => new result());
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