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// |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-array.prototype.reduce
description: TypedArray instance buffer can be resized during iteration
includes: [testTypedArray.js, compareArray.js]
features: [TypedArray, resizable-arraybuffer]
---*/
testWithTypedArrayConstructors(function(TA) {
var BPE = TA.BYTES_PER_ELEMENT;
var buffer = new ArrayBuffer(BPE * 3, {maxByteLength: BPE * 3});
var sample = new TA(buffer);
var expectedPrevs, expectedNexts, expectedIndices, expectedArrays;
var prevs, nexts, indices, arrays, result;
prevs = [];
nexts = [];
indices = [];
arrays = [];
result = Array.prototype.reduce.call(sample, function(prev, next, index, array) {
if (prevs.length === 0) {
try {
buffer.resize(2 * BPE);
expectedPrevs = [262, 0];
expectedNexts = [0, 0];
expectedIndices = [0, 1];
expectedArrays = [sample, sample];
} catch (_) {
expectedPrevs = [262, 0, 1];
expectedNexts = [0, 0, 0];
expectedIndices = [0, 1, 2];
expectedArrays = [sample, sample, sample];
}
}
prevs.push(prev);
nexts.push(next);
indices.push(index);
arrays.push(array);
return index;
}, 262);
assert.compareArray(prevs, expectedPrevs, 'prevs (shrink)');
assert.compareArray(nexts, expectedNexts, 'nexts (shrink)');
assert.compareArray(indices, expectedIndices, 'indices (shrink)');
assert.compareArray(arrays, expectedArrays, 'arrays (shrink)');
assert.sameValue(result, expectedIndices[expectedIndices.length - 1], 'result (shrink)');
prevs = [];
nexts = [];
indices = [];
arrays = [];
result = Array.prototype.reduce.call(sample, function(prev, next, index, array) {
if (prevs.length === 0) {
try {
buffer.resize(3 * BPE);
} catch (_) {}
}
prevs.push(prev);
nexts.push(next);
indices.push(index);
arrays.push(array);
return index;
}, 262);
assert.compareArray(prevs, expectedPrevs, 'prevs (grow)');
assert.compareArray(nexts, expectedNexts, 'nexts (grow)');
assert.compareArray(indices, expectedIndices, 'indices (grow)');
assert.compareArray(arrays, expectedArrays, 'arrays (grow)');
assert.sameValue(result, expectedIndices[expectedIndices.length - 1], 'result (grow)');
});
reportCompare(0, 0);
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