text: // Copyright (C) 2017 Caio Lima. All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  
  /*---
  description: Mapped arguments property descriptor change to non-writable, non-enumerable and non-configurable
  info: >
      Change the descriptor using [[DefineOwnProperty]] to {writable: false, enumerable: false},
      set argument[0] = 2 and then change property descriptor to {configurable: false}.
      The descriptor's enumerable property continues with its configured value.
  flags: [noStrict]
  esid: sec-arguments-exotic-objects-defineownproperty-p-desc
  includes: [propertyHelper.js]
  ---*/
  
  function fn(a) {
    Object.defineProperty(arguments, "0", {writable: false, enumerable: false});
    arguments[0] = 2;
    Object.defineProperty(arguments, "0", {configurable: false});
  
    let propertyDescriptor = Object.getOwnPropertyDescriptor(arguments, "0");
    assert.sameValue(propertyDescriptor.value, 1);
    verifyNotEnumerable(arguments, "0");
    verifyNotWritable(arguments, "0");
    verifyNotConfigurable(arguments, "0");
  
    // Postcondition: Arguments mapping is removed.
    a = 3;
    propertyDescriptor = Object.getOwnPropertyDescriptor(arguments, "0");
    assert.sameValue(propertyDescriptor.value, 1);
    verifyNotEnumerable(arguments, "0");
    verifyNotWritable(arguments, "0");
    verifyNotConfigurable(arguments, "0");
  }
  fn(1);
  