File: mapfn-is-symbol-throws.js

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// Copyright 2015 Leonardo Balter. All rights reserved.
// This code is governed by the license found in the LICENSE file.
/*---
esid: sec-array.from
es6id: 22.1.2.1
description: Throws a TypeError if mapFn is not callable (Symbol)
info: |
  22.1.2.1 Array.from ( items [ , mapfn [ , thisArg ] ] )

  ...
  2. If mapfn is undefined, let mapping be false.
  3. else
    a. If IsCallable(mapfn) is false, throw a TypeError exception.
    ...
features:
  - Symbol
---*/

assert.throws(TypeError, function() {
  Array.from([], Symbol('1'));
});