@Test
public void invokeStringParamWithOffset() {

    FunctionTestUtil.assertResult(timeFunction.invoke("10:15:06+01:00"), OffsetTime.of(10,15,6, 0, ZoneOffset.ofHours(1)));
    FunctionTestUtil.assertResult(timeFunction.invoke("10:15:06-01:00"), OffsetTime.of(10,15,6, 0, ZoneOffset.ofHours(-1)));
}