test/built-ins/TypedArrays/of/new-instance-using-custom-ctor.js


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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-%typedarray%.of
description: >
  Return a new TypedArray using a custom Constructor
includes: [testTypedArray.js]
features: [TypedArray]
---*/

testWithTypedArrayConstructors(function(TA) {
  var called = 0;

  var ctor = function(len) {
    assert.sameValue(arguments.length, 1);
    called++;
    return new TA(len);
  };


  var result = TA.of.call(ctor, 42, 43, 42);
  assert.sameValue(result.length, 3);
  assert.sameValue(result[0], 42);
  assert.sameValue(result[1], 43);
  assert.sameValue(result[2], 42);
  assert.sameValue(result.constructor, TA);
  assert.sameValue(called, 1);
});