-
Notifications
You must be signed in to change notification settings - Fork 3.1k
/
detached-buffers.any.js
151 lines (128 loc) · 5.39 KB
/
detached-buffers.any.js
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
143
144
145
146
147
148
149
150
151
// META: global=worker,jsshell
'use strict';
promise_test(() => {
const stream = new ReadableStream({
start(c) {
c.close();
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
const view = new Uint8Array([1, 2, 3]);
return reader.read(view).then(({ value, done }) => {
// Sanity checks
assert_true(value instanceof Uint8Array, 'The value read must be a Uint8Array');
assert_not_equals(value, view, 'The value read must not be the *same* Uint8Array');
assert_array_equals(value, [], 'The value read must be an empty Uint8Array, since the stream is closed');
assert_true(done, 'done must be true, since the stream is closed');
// The important assertions
assert_not_equals(value.buffer, view.buffer, 'a different ArrayBuffer must underlie the value');
assert_equals(view.buffer.byteLength, 0, 'the original buffer must be detached');
});
}, 'ReadableStream with byte source: read()ing from a closed stream still transfers the buffer');
promise_test(() => {
const stream = new ReadableStream({
start(c) {
c.enqueue(new Uint8Array([1, 2, 3]));
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
const view = new Uint8Array([4, 5, 6]);
return reader.read(view).then(({ value, done }) => {
// Sanity checks
assert_true(value instanceof Uint8Array, 'The value read must be a Uint8Array');
assert_not_equals(value, view, 'The value read must not be the *same* Uint8Array');
assert_array_equals(value, [1, 2, 3], 'The value read must be the enqueued Uint8Array, not the original values');
assert_false(done, 'done must be false, since the stream is not closed');
// The important assertions
assert_not_equals(value.buffer, view.buffer, 'a different ArrayBuffer must underlie the value');
assert_equals(view.buffer.byteLength, 0, 'the original buffer must be detached');
});
}, 'ReadableStream with byte source: read()ing from a stream with queued chunks still transfers the buffer');
test(() => {
const stream = new ReadableStream({
start(c) {
const view = new Uint8Array([1, 2, 3]);
c.enqueue(view);
assert_throws(new TypeError(), () => c.enqueue(view), 'enqueuing an already-detached buffer must throw');
},
type: 'bytes'
});
}, 'ReadableStream with byte source: enqueuing an already-detached buffer throws');
promise_test(t => {
const stream = new ReadableStream({
start(c) {
c.enqueue(new Uint8Array([1, 2, 3]));
},
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
const view = new Uint8Array([4, 5, 6]);
return reader.read(view).then(() => {
// view is now detached
return promise_rejects(t, new TypeError(), reader.read(view),
'read(view) must reject when given an already-detached buffer');
});
}, 'ReadableStream with byte source: reading into an already-detached buffer rejects');
async_test(t => {
const stream = new ReadableStream({
pull: t.step_func_done(c => {
// Detach it by reading into it
reader.read(c.byobRequest.view);
assert_throws(new TypeError(), () => c.byobRequest.respond(1),
'respond() must throw if the corresponding view has become detached');
}),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
reader.read(new Uint8Array([4, 5, 6]));
}, 'ReadableStream with byte source: respond() throws if the BYOB request\'s buffer has been detached (in the ' +
'readable state)');
async_test(t => {
const stream = new ReadableStream({
pull: t.step_func_done(c => {
// Detach it by reading into it
reader.read(c.byobRequest.view);
c.close();
assert_throws(new TypeError(), () => c.byobRequest.respond(0),
'respond() must throw if the corresponding view has become detached');
}),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
reader.read(new Uint8Array([4, 5, 6]));
}, 'ReadableStream with byte source: respond() throws if the BYOB request\'s buffer has been detached (in the ' +
'closed state)');
async_test(t => {
const stream = new ReadableStream({
pull: t.step_func_done(c => {
// Detach it by reading into it
const view = new Uint8Array([1, 2, 3]);
reader.read(view);
assert_throws(new TypeError(), () => c.byobRequest.respondWithNewView(view),
'respondWithNewView() must throw if passed a detached view');
}),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
reader.read(new Uint8Array([4, 5, 6]));
}, 'ReadableStream with byte source: respondWithNewView() throws if the supplied view\'s buffer has been detached ' +
'(in the readable state)');
async_test(t => {
const stream = new ReadableStream({
pull: t.step_func_done(c => {
// Detach it by reading into it
const view = new Uint8Array([1, 2, 3]);
reader.read(view);
c.close();
const zeroLengthView = new Uint8Array(view.buffer, 0, 0);
assert_throws(new TypeError(), () => c.byobRequest.respondWithNewView(zeroLengthView),
'respondWithNewView() must throw if passed a (zero-length) view whose buffer has been detached');
}),
type: 'bytes'
});
const reader = stream.getReader({ mode: 'byob' });
reader.read(new Uint8Array([4, 5, 6]));
}, 'ReadableStream with byte source: respondWithNewView() throws if the supplied view\'s buffer has been detached ' +
'(in the closed state)');