// Copyright 2010 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials provided
//       with the distribution.
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//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

let valueOf = Object.prototype.valueOf;

assertEquals('object', typeof valueOf.call(true));
assertEquals('object', typeof valueOf.call(false));
assertEquals('object', typeof valueOf.call(1.23));
assertEquals('object', typeof valueOf.call(0));
assertEquals('object', typeof valueOf.call('a'));
assertEquals('object', typeof valueOf.call(Symbol.isConcatSpreadable));
assertThrows(() => valueOf.call(undefined), TypeError);
assertThrows(() => valueOf.call(null), TypeError);

function MyException() { }
var o = new Object();
o.valueOf = function() { throw new MyException(); }

assertThrows(function() { o + 1 }, MyException);