blob: 30b4a2758615f8e423b5c91fe062b4d137d0a36a (
plain)
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
|
// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
// Copyright (C) 2021 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-dataview-buffer-byteoffset-bytelength
description: >
The view's offset may equal the underlying buffer's byte length if it is
modified during retrieval of the NewTarget's prototype.
features: [resizable-arraybuffer]
---*/
// If the host chooses to throw as allowed by the specification, the observed
// behavior will be identical to the case where `ArrayBuffer.prototype.resize`
// has not been implemented. The following assertion prevents this test from
// passing in runtimes which have not implemented the method.
assert.sameValue(typeof ArrayBuffer.prototype.resize, 'function');
var buffer = new ArrayBuffer(3, {maxByteLength: 3});
var expectedByteLength;
var newTarget = function() {}.bind(null);
Object.defineProperty(newTarget, 'prototype', {
get: function() {
try {
buffer.resize(2);
expectedByteLength = 0;
} catch (error) {
expectedByteLength = 1;
}
}
});
var result = Reflect.construct(DataView, [buffer, 2], newTarget);
assert.sameValue(result.constructor, DataView);
assert.sameValue(result.byteLength, expectedByteLength);
reportCompare(0, 0);
|
