forked from nodejs/node
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathtest-esm-live-binding.mjs
More file actions
142 lines (102 loc) · 3.49 KB
/
test-esm-live-binding.mjs
File metadata and controls
142 lines (102 loc) · 3.49 KB
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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
// Flags: --experimental-modules
import '../common/index.mjs';
import assert from 'assert';
import fs, { readFile, readFileSync } from 'fs';
import events, { defaultMaxListeners } from 'events';
import util from 'util';
const readFileDescriptor = Reflect.getOwnPropertyDescriptor(fs, 'readFile');
const readFileSyncDescriptor =
Reflect.getOwnPropertyDescriptor(fs, 'readFileSync');
const s = Symbol();
const fn = () => s;
Reflect.deleteProperty(fs, 'readFile');
assert.deepStrictEqual([fs.readFile, readFile], [undefined, undefined]);
fs.readFile = fn;
assert.deepStrictEqual([fs.readFile(), readFile()], [s, s]);
Reflect.defineProperty(fs, 'readFile', {
value: fn,
configurable: true,
writable: true,
});
assert.deepStrictEqual([fs.readFile(), readFile()], [s, s]);
Reflect.deleteProperty(fs, 'readFile');
assert.deepStrictEqual([fs.readFile, readFile], [undefined, undefined]);
let count = 0;
Reflect.defineProperty(fs, 'readFile', {
get() { return count; },
configurable: true,
});
count++;
assert.deepStrictEqual([readFile, fs.readFile, readFile], [0, 1, 1]);
let otherValue;
Reflect.defineProperty(fs, 'readFile', { // eslint-disable-line accessor-pairs
set(value) {
Reflect.deleteProperty(fs, 'readFile');
otherValue = value;
},
configurable: true,
});
Reflect.defineProperty(fs, 'readFileSync', {
get() {
return otherValue;
},
configurable: true,
});
fs.readFile = 2;
assert.deepStrictEqual([readFile, readFileSync], [undefined, 2]);
Reflect.defineProperty(fs, 'readFile', readFileDescriptor);
Reflect.defineProperty(fs, 'readFileSync', readFileSyncDescriptor);
const originDefaultMaxListeners = events.defaultMaxListeners;
const utilProto = util.__proto__; // eslint-disable-line no-proto
count = 0;
Reflect.defineProperty(Function.prototype, 'defaultMaxListeners', {
configurable: true,
enumerable: true,
get: function() { return ++count; },
set: function(v) {
Reflect.defineProperty(this, 'defaultMaxListeners', {
configurable: true,
enumerable: true,
writable: true,
value: v,
});
},
});
assert.strictEqual(defaultMaxListeners, originDefaultMaxListeners);
assert.strictEqual(events.defaultMaxListeners, originDefaultMaxListeners);
assert.strictEqual(++events.defaultMaxListeners,
originDefaultMaxListeners + 1);
assert.strictEqual(defaultMaxListeners, originDefaultMaxListeners + 1);
assert.strictEqual(Function.prototype.defaultMaxListeners, 1);
Function.prototype.defaultMaxListeners = 'foo';
assert.strictEqual(Function.prototype.defaultMaxListeners, 'foo');
assert.strictEqual(events.defaultMaxListeners, originDefaultMaxListeners + 1);
assert.strictEqual(defaultMaxListeners, originDefaultMaxListeners + 1);
count = 0;
const p = {
get foo() { return ++count; },
set foo(v) {
Reflect.defineProperty(this, 'foo', {
configurable: true,
enumerable: true,
writable: true,
value: v,
});
},
};
util.__proto__ = p; // eslint-disable-line no-proto
assert.strictEqual(util.foo, 1);
util.foo = 'bar';
assert.strictEqual(count, 1);
assert.strictEqual(util.foo, 'bar');
assert.strictEqual(p.foo, 2);
p.foo = 'foo';
assert.strictEqual(p.foo, 'foo');
events.defaultMaxListeners = originDefaultMaxListeners;
util.__proto__ = utilProto; // eslint-disable-line no-proto
Reflect.deleteProperty(util, 'foo');
Reflect.deleteProperty(Function.prototype, 'defaultMaxListeners');
assert.throws(
() => Object.defineProperty(events, 'defaultMaxListeners', { value: 3 }),
/TypeError: Cannot redefine/
);