@Test
public void round_null_missing() {

  FunctionExpression round = dsl.round(
      DSL.ref(INT_TYPE_NULL_VALUE_FIELD, INTEGER),
      DSL.ref(INT_TYPE_MISSING_VALUE_FIELD, INTEGER));
  assertEquals(LONG, round.type());
  assertTrue(round.valueOf(valueEnv()).isMissing());
  round = dsl.round(
      DSL.ref(INT_TYPE_MISSING_VALUE_FIELD, INTEGER),
      DSL.ref(INT_TYPE_NULL_VALUE_FIELD, INTEGER));
  assertEquals(LONG, round.type());
  assertTrue(round.valueOf(valueEnv()).isMissing());
}