test262/test/built-ins/DataView/custom-proto-access-resizes-buffer-invalid-by-offset.js

// 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 cannot exceed 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 expectedError;

var newTarget = function() {}.bind(null);
Object.defineProperty(newTarget, 'prototype', {
  get: function() {
    try {
      buffer.resize(1);
      expectedError = RangeError;
    } catch (error) {
      expectedError = null;
    }
  }
});
var error = null;

try {
  Reflect.construct(DataView, [buffer, 2], newTarget);
} catch (caught) {
  error = caught.constructor;
}

assert.sameValue(error, expectedError);