newtarget-prototype-is-not-object.js

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// |reftest| skip-if(!this.hasOwnProperty('SharedArrayBuffer')) -- SharedArrayBuffer is not enabled unconditionally

// Copyright (C) 2015 André Bargull. All rights reserved.

// Copyright (C) 2017 Mozilla Foundation. All rights reserved.

// This code is governed by the BSD license found in the LICENSE file.

/*---

esid: sec-sharedarraybuffer-length

description: >

  [[Prototype]] defaults to %SharedArrayBufferPrototype% if NewTarget.prototype is not an object.

info: |

  SharedArrayBuffer( length )

  SharedArrayBuffer called with argument length performs the following steps:

...

  3. Return AllocateSharedArrayBuffer(NewTarget, byteLength).

  AllocateSharedArrayBuffer( constructor, byteLength )

    1. Let obj be ? OrdinaryCreateFromConstructor(constructor, "%SharedArrayBufferPrototype%",

       «[[ArrayBufferData]], [[ArrayBufferByteLength]]» ).

...

features: [SharedArrayBuffer, Symbol, Reflect.construct]

---*/

function newTarget() {}

newTarget.prototype = undefined;

var arrayBuffer = Reflect.construct(SharedArrayBuffer, [1], newTarget);

assert.sameValue(Object.getPrototypeOf(arrayBuffer), SharedArrayBuffer.prototype, "newTarget.prototype is undefined");

newTarget.prototype = null;

var arrayBuffer = Reflect.construct(SharedArrayBuffer, [2], newTarget);

assert.sameValue(Object.getPrototypeOf(arrayBuffer), SharedArrayBuffer.prototype, "newTarget.prototype is null");

newTarget.prototype = true;

var arrayBuffer = Reflect.construct(SharedArrayBuffer, [3], newTarget);

assert.sameValue(Object.getPrototypeOf(arrayBuffer), SharedArrayBuffer.prototype, "newTarget.prototype is a Boolean");

newTarget.prototype = "";

var arrayBuffer = Reflect.construct(SharedArrayBuffer, [4], newTarget);

assert.sameValue(Object.getPrototypeOf(arrayBuffer), SharedArrayBuffer.prototype, "newTarget.prototype is a String");

newTarget.prototype = Symbol();

var arrayBuffer = Reflect.construct(SharedArrayBuffer, [5], newTarget);

assert.sameValue(Object.getPrototypeOf(arrayBuffer), SharedArrayBuffer.prototype, "newTarget.prototype is a Symbol");

newTarget.prototype = 1;

var arrayBuffer = Reflect.construct(SharedArrayBuffer, [6], newTarget);

assert.sameValue(Object.getPrototypeOf(arrayBuffer), SharedArrayBuffer.prototype, "newTarget.prototype is a Number");

reportCompare(0, 0);