text: // Copyright 2015 Microsoft Corporation. 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: Map function without thisArg on strict mode
  info: >
    22.1.2.1 Array.from ( items [ , mapfn [ , thisArg ] ] )
  
    ...
    10. Let len be ToLength(Get(arrayLike, "length")).
    11. ReturnIfAbrupt(len).
    12. If IsConstructor(C) is true, then
      a. Let A be Construct(C, «len»).
    13. Else,
      b. Let A be ArrayCreate(len).
    14. ReturnIfAbrupt(A).
    15. Let k be 0.
    16. Repeat, while k < len
      a. Let Pk be ToString(k).
      b. Let kValue be Get(arrayLike, Pk).
      c. ReturnIfAbrupt(kValue).
      d. If mapping is true, then
        i. Let mappedValue be Call(mapfn, T, «kValue, k»).
    ...
  flags: [onlyStrict]
  ---*/
  
  var list = {
    '0': 41,
    '1': 42,
    '2': 43,
    length: 3
  };
  var calls = [];
  
  function mapFn (value) {
    calls.push({
      args: arguments,
      thisArg: this
    });
    return value * 2;
  }
  
  var result = Array.from(list, mapFn);
  
  assert.sameValue(result.length, 3, 'result.length');
  assert.sameValue(result[0], 82, 'result[0]');
  assert.sameValue(result[1], 84, 'result[1]');
  assert.sameValue(result[2], 86, 'result[2]');
  
  assert.sameValue(calls.length, 3, 'calls.length');
  
  assert.sameValue(calls[0].args.length, 2, 'calls[0].args.length');
  assert.sameValue(calls[0].args[0], 41, 'calls[0].args[0]');
  assert.sameValue(calls[0].args[1], 0, 'calls[0].args[1]');
  assert.sameValue(calls[0].thisArg, undefined, 'calls[0].thisArg');
  
  assert.sameValue(calls[1].args.length, 2, 'calls[1].args.length');
  assert.sameValue(calls[1].args[0], 42, 'calls[1].args[0]');
  assert.sameValue(calls[1].args[1], 1, 'calls[1].args[1]');
  assert.sameValue(calls[1].thisArg, undefined, 'calls[1].thisArg');
  
  assert.sameValue(calls[2].args.length, 2, 'calls[2].args.length');
  assert.sameValue(calls[2].args[0], 43, 'calls[2].args[0]');
  assert.sameValue(calls[2].args[1], 2, 'calls[2].args[1]');
  assert.sameValue(calls[2].thisArg, undefined, 'calls[2].thisArg');
  