use "date"

def testNewDate() {
  d = newDate(2016, 04, 10)
  assertEquals(2016, d.year)
  assertEquals(4, d.month)
  assertEquals(10, d.day)
  assertEquals(0, d.hour)
  assertEquals(0, d.minute)
  assertEquals(0, d.second)
  assertEquals(0, d.millisecond)
}