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
|
// |reftest| shell-option(--enable-arraybuffer-resizable) shell-option(--enable-float16array) 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-%typedarray%.prototype.findlastindex
description: Instance buffer can be resized during iteration
includes: [testTypedArray.js, compareArray.js]
features: [TypedArray, 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');
testWithTypedArrayConstructors(function(TA) {
var BPE = TA.BYTES_PER_ELEMENT;
var buffer = new ArrayBuffer(BPE * 3, {maxByteLength: BPE * 4});
var sample = new TA(buffer);
var secondElement, expectedElements, expectedIndices, expectedArrays;
var elements, indices, arrays, result;
elements = [];
indices = [];
arrays = [];
result = sample.findLastIndex(function(element, index, array) {
if (elements.length === 0) {
try {
buffer.resize(BPE);
secondElement = undefined;
expectedElements = [0];
expectedIndices = [0];
expectedArrays = [sample];
} catch (_) {
secondElement = 0;
expectedElements = [0, 0, 0];
expectedIndices = [2, 1, 0];
expectedArrays = [sample, sample, sample];
}
}
elements.push(element);
indices.push(index);
arrays.push(array);
return false;
});
assert.compareArray(elements, [0, secondElement, 0], 'elements (shrink)');
assert.compareArray(indices, [2, 1, 0], 'indices (shrink)');
assert.compareArray(arrays, [sample, sample, sample], 'arrays (shrink)');
assert.sameValue(result, -1, 'result (shrink)');
elements = [];
indices = [];
arrays = [];
result = sample.findLastIndex(function(element, index, array) {
if (elements.length === 0) {
try {
buffer.resize(4 * BPE);
} catch (_) {}
}
elements.push(element);
indices.push(index);
arrays.push(array);
return false;
});
assert.compareArray(elements, expectedElements, 'elements (grow)');
assert.compareArray(indices, expectedIndices, 'indices (grow)');
assert.compareArray(arrays, expectedArrays, 'arrays (grow)');
assert.sameValue(result, -1, 'result (grow)');
});
reportCompare(0, 0);
|
