Check stepUp() and stepDown() bahevior for unsupported types. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". Unsupported type PASS input.step = "3"; input.min = ""; input.max = ""; input.value = "2"; input.stepDown() threw exception InvalidStateError: The object is in an invalid state.. PASS input.stepDown(0) threw exception InvalidStateError: The object is in an invalid state.. PASS input.stepUp() threw exception InvalidStateError: The object is in an invalid state.. PASS input.stepUp(0) threw exception InvalidStateError: The object is in an invalid state.. PASS successfullyParsed is true TEST COMPLETE