michael@0: function test() {
michael@0:     var values = [undefined, null, Math, objectEmulatingUndefined()];
michael@0:     var expected = [true, true, false, true];
michael@0: 
michael@0:     for (var i=0; i<100; i++) {
michael@0:         var idx = i % values.length;
michael@0:         if (values[idx] == undefined)
michael@0:             assertEq(expected[idx], true);
michael@0:         else
michael@0:             assertEq(expected[idx], false);
michael@0: 
michael@0:         if (null != values[idx])
michael@0:             assertEq(expected[idx], false);
michael@0:         else
michael@0:             assertEq(expected[idx], true);
michael@0:     }
michael@0: }
michael@0: test();