1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
// 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.
// Flags: --expose-debug-as debug --harmony-proxies
Debug = debug.Debug
var exception = null;
var log = [];
function listener(event, exec_state, event_data, data) {
if (event != Debug.DebugEvent.Break) return;
try {
print(event_data.sourceLineText());
var entry = "";
for (var i = 0; i < exec_state.frameCount(); i++) {
entry += exec_state.frame(i).sourceLineText().substr(-1);
entry += exec_state.frame(i).sourceColumn();
}
log.push(entry);
exec_state.prepareStep(Debug.StepAction.StepIn);
} catch (e) {
exception = e;
}
};
var target = {};
var handler = {
has: function(target, name) {
return true; // h
}, // i
get: function(target, name) {
return 42; // j
}, // k
set: function(target, name, value) {
return false; // l
}, // m
enumerate: function(target) {
function* keys() { // n
yield "foo"; // o
yield "bar"; // p
} // q
return keys(); // r
}, // s
}
var proxy = new Proxy(target, handler);
Debug.setListener(listener);
debugger; // a
var has = "step" in proxy; // b
var get = proxy.step; // c
proxy.step = 43; // d
for (var i in proxy) { // e
log.push(i); // f
}
Debug.setListener(null); // g
assertNull(exception);
assertTrue(has);
assertEquals(42, get);
assertEquals([
"a0",
"b0", "h4b20", "i2b20", // [[Has]]
"c0", "j4c15", "k2c15", // [[Get]]
"d0", "l4d11", "m2d11", // [[Set]]
"e14", "r4e14", "q4r11e14", "s2e14", // for-in [[Enumerate]]
"o6e14", "q4e14", "p6e14", "q4e14", "q4e14", // exhaust iterator
"e9", // for-in-body
"h4e9","i2e9", // [[Has]] property
"f2","foo", "e9", // for-in-body
"h4e9","i2e9", // [[Has]]property
"f2","bar", "e9", // for-in-body
"g0"
], log);
|
