add more tests, and fix the XFAILS caused by faulty toString methods
add more tests, and fix the XFAILS caused by faulty toString methods

toshok/echojs,carlosalberto/echo-js,carlosalberto/echo-js,carlosalberto/echo-js,carlosalberto/echo-js,toshok/echojs,toshok/echojs,toshok/echojs,toshok/echojs,carlosalberto/echo-js,carlosalberto/echo-js,toshok/echojs,toshok/echojs,toshok/echojs