michael@0: /*
michael@0:  * Any copyright is dedicated to the Public Domain.
michael@0:  * http://creativecommons.org/licenses/publicdomain/
michael@0:  * Contributor:
michael@0:  *   Jeff Walden <jwalden+code@mit.edu>
michael@0:  */
michael@0: 
michael@0: //-----------------------------------------------------------------------------
michael@0: var BUGNUMBER = 657298;
michael@0: var summary = 'Various quirks of setting array length properties to objects';
michael@0: 
michael@0: print(BUGNUMBER + ": " + summary);
michael@0: 
michael@0: /**************
michael@0:  * BEGIN TEST *
michael@0:  **************/
michael@0: 
michael@0: function invokeConversionTwice1()
michael@0: {
michael@0:   var count = 0;
michael@0:   [].length = { valueOf: function() { count++; return 1; } };
michael@0:   assertEq(count, 2);
michael@0: }
michael@0: invokeConversionTwice1();
michael@0: 
michael@0: function invokeConversionTwice2()
michael@0: {
michael@0:   var count = 0;
michael@0:   [].length = { toString: function() { count++; return 1; }, valueOf: null };
michael@0:   assertEq(count, 2);
michael@0: }
michael@0: invokeConversionTwice2();
michael@0: 
michael@0: function dontOverwriteError1()
michael@0: {
michael@0:   try
michael@0:   {
michael@0:     [].length = { valueOf: {}, toString: {} };
michael@0:     throw new Error("didn't throw a TypeError");
michael@0:   }
michael@0:   catch (e)
michael@0:   {
michael@0:     assertEq(e instanceof TypeError, true,
michael@0:              "expected a TypeError running out of conversion options, got " + e);
michael@0:   }
michael@0: }
michael@0: dontOverwriteError1();
michael@0: 
michael@0: function dontOverwriteError2()
michael@0: {
michael@0:   try
michael@0:   {
michael@0:     [].length = { valueOf: function() { throw "error"; } };
michael@0:     throw new Error("didn't throw a TypeError");
michael@0:   }
michael@0:   catch (e)
michael@0:   {
michael@0:     assertEq(e, "error", "expected 'error' from failed conversion, got " + e);
michael@0:   }
michael@0: }
michael@0: dontOverwriteError2();
michael@0: 
michael@0: /******************************************************************************/
michael@0: 
michael@0: if (typeof reportCompare === "function")
michael@0:   reportCompare(true, true);
michael@0: 
michael@0: print("All tests passed!");