JSTests/test262/test/language/statements/class/subclass/builtin-objects/DataView/regular-subclassing.js

// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 24.2.2
description: Subclassing the DataView object
info: >
  24.2.2 The DataView Constructor

  ...

  The DataView constructor is designed to be subclassable. It may be used as the
  value of an extends clause of a class definition. Subclass constructors that
  intend to inherit the specified DataView behaviour must include a super call
  to the DataView constructor to create and initialize subclass instances with
  the internal state necessary to support the DataView.prototype built-in
  methods.
---*/

class DV extends DataView {}

var buffer = new ArrayBuffer(1);

var dv = new DV(buffer);
assert.sameValue(dv.buffer, buffer);

assert.throws(TypeError, function() {
  new DV();
});