michael@0: function testNullToString()
michael@0: {
michael@0:     var a = [];
michael@0:     for (var i = 0; i < 10; i++)
michael@0:         a.push(String(null));
michael@0:     for (i = 0; i < 10; i++) {
michael@0:         var t = typeof a[i];
michael@0:         if (t != "string")
michael@0:            a.push(t);
michael@0:     }
michael@0:     return a.join(",");
michael@0: }
michael@0: assertEq(testNullToString(), "null,null,null,null,null,null,null,null,null,null");