
} , "stepUp step value empty on default step value ");

test(function(){
  _StepTest.value = "12:00";
  _StepTest.step = "";
  _StepTest.stepDown();
  assert_in_array(
    _StepTest.value,
    [
      "11:59",
      "11:59:00",
      "11:59:00.0",
      "11:59:00.00",
      "11:59:00.000"],
    "a valid time string representing 1 minute before noon");
}, "stepDown step value empty default step value");

test(function(){
  _StepTest.value = "12:00";
  _StepTest.step = "-600";
  _StepTest.stepUp();
  assert_