text: // Copyright JS Foundation and other contributors, http://js.foundation
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  var obj = [];
  
  Object.defineProperty (obj, "prop", {
      value: 2010,
      writable: true,
      enumerable: true,
      configurable: false
  });
  
  assert (obj.hasOwnProperty ("prop"));
  function getFunc() {
      return 20;
  }
  
  try {
      Object.defineProperty (obj, "prop", {
          get: getFunc
      });
      assert (false);
  } catch (e) {
      assert (e instanceof TypeError);
      var desc = Object.getOwnPropertyDescriptor (obj, "prop");
      assert (desc.value === 2010);
      assert (typeof (desc.get) === 'undefined');
  }
  
  obj = {};
  var setter = function () {};
  
  Object.defineProperty(obj, "prop", {
      set: setter,
      configurable: true
  });
  
  var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
  
  Object.defineProperty(obj, "prop", {
      set: undefined
  });
  
  var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
  assert (desc1.set === setter && desc2.set === undefined);
  
  obj = {};
  
  /* This error is thrown even in non-strict mode. */
  Object.defineProperty(obj, 'f', {
    set: function(value) { throw 234; },
  });
  
  try {
    obj.f = 5;
    assert (false);
  } catch (err) {
    assert (err === 234);
  }
  