text: // Copyright 2013 the V8 project authors. All rights reserved.
  // Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions
  // are met:
  // 1.  Redistributions of source code must retain the above copyright
  //     notice, this list of conditions and the following disclaimer.
  // 2.  Redistributions in binary form must reproduce the above copyright
  //     notice, this list of conditions and the following disclaimer in the
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  //
  // THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  // DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  // ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  // Flags: --harmony-instanceof
  
  description('This test makes sure that instance of behaves correctly when the value, constructor, or its prototype are immediates.');
  
  // A Constructor to use check for instances of, and an instance called obj.
  function Constructor() {}
  var obj = new Constructor();
  
  // Run a batch of tests; call'testInstanceOf' three times, passing 1, {}, and the object 'obj', which is an instance of Constructor.
  function testSet(constructor, testMethod)
  {
      testMethod["1"]("(1 instanceof " + constructor + ")");
      testMethod["{}"]("({} instanceof " + constructor + ")");
      testMethod["obj"]("(obj instanceof " + constructor + ")");
  }
  
  // Test set 1, test passing the integer 1 as the constructor to be tested for.
  // The constructor being an object is the first thing tested, so these should all throw.
  testSet("1", { "1":shouldThrow, "{}":shouldThrow, "obj":shouldThrow });
  
  // Test set 2, test passing an empty object ({}) as the constructor to be tested for.
  // As well as being an object, the constructor must implement 'HasInstance' (i.e. be a function), so these should all throw too.
  testSet("{}", { "1":shouldThrow, "{}":shouldThrow, "obj":shouldThrow });
  
  // Test set 3, test passing Constructor as the constructor to be tested for.
  // Nothing should except, the third test should pass, since obj is an instance of Constructor.
  testSet("Constructor", { "1":shouldBeFalse, "{}":shouldBeFalse, "obj":shouldBeTrue });
  
  // Test set 4, test passing Constructor as the constructor to be tested for - with Constructor.prototype set to the integer 1.
  // Constructor.prototype being a non-object will cause an exception, /unless/ value is also a non-object, since this is checked first.
  Constructor.prototype = 1;
  testSet("Constructor", { "1":shouldBeFalse, "{}":shouldThrow, "obj":shouldThrow });
  
  // Test set 5, test passing Constructor as the constructor to be tested for - with Constructor.prototype set to an empty object ({}).
  // All test fail, no reason to throw.  (obj instanceof Constructor) is now false, since Constructor.prototype has changed.
  Constructor.prototype = {};
  testSet("Constructor", { "1":shouldBeFalse, "{}":shouldBeFalse, "obj":shouldBeFalse });
  
  // Test set 6, test passing Constructor as the constructor to be tested for - with Constructor.prototype set to null.
  // Test that behaviour is the same as for test set 4.
  Constructor.prototype = null;
  testSet("Constructor", { "1":shouldBeFalse, "{}":shouldThrow, "obj":shouldThrow });
  