ToNumber(Symbol) should throw TypeError

test/mjsunit/harmony/private.js

 // Copyright 2013 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
@@ skipping 96 matching lines @@
     assertEquals(2, !symbols[i] ? 1 : 2)
     if (!symbols[i]) assertUnreachable();
     if (symbols[i]) {} else assertUnreachable();
   }
 }
 TestToBoolean()
 
 
 function TestToNumber() {
   for (var i in symbols) {
-    assertSame(NaN, Number(symbols[i]).valueOf())
-    assertSame(NaN, symbols[i] + 0)
+    assertThrows(function() { Number(symbols[i]); }, TypeError);
+    assertThrows(function() { symbols[i] + 0; }, TypeError);
   }
 }
 TestToNumber()
 
 
 function TestEquality() {
   // Every symbol should equal itself, and non-strictly equal its wrapper.
   for (var i in symbols) {
     assertSame(symbols[i], symbols[i])
     assertEquals(symbols[i], symbols[i])
@@ skipping 220 matching lines @@
   obj[sym] = 1
   freeze(obj)
   obj[sym] = 2
   assertEquals(2, obj[sym])
   assertTrue(delete obj[sym])
   assertEquals(undefined, obj[sym])
 }
 TestSealAndFreeze(Object.seal)
 TestSealAndFreeze(Object.freeze)
 TestSealAndFreeze(Object.preventExtensions)