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// |reftest| skip -- resizable-arraybuffer is not supported
// 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-get-%typedarray%.prototype.byteoffset
description: |
reset to 0 if the underlying ArrayBuffer is resized beyond the boundary of
the dynamically-sized TypedArray instance
includes: [testTypedArray.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 ab = new ArrayBuffer(BPE * 4, {maxByteLength: BPE * 5});
var array = new TA(ab, BPE);
var expected = BPE * 3;
assert.sameValue(array.byteLength, expected);
try {
ab.resize(BPE * 5);
expected = BPE * 4;
} catch (_) {}
assert.sameValue(array.byteLength, expected, "following grow");
try {
ab.resize(BPE * 3);
expected = BPE * 2;
} catch (_) {}
assert.sameValue(array.byteLength, expected, "following shrink (within bounds)");
try {
ab.resize(BPE);
expected = 0;
} catch (_) {}
assert.sameValue(array.byteLength, expected, "following shrink (on boundary)");
try {
ab.resize(0);
expected = 0;
} catch (_) {}
assert.sameValue(array.byteLength, expected, "following shrink (out of bounds)");
});
reportCompare(0, 0);
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