@Test
public void shouldFlatMap() {
final Tuple4<Object, Object, Object, Object> tuple = createTuple();
final Function4<Object, Object, Object, Object, Tuple4<Object, Object, Object, Object>> mapper =
(o1, o2, o3, o4) -> tuple;
final Tuple4<Object, Object, Object, Object> actual = tuple.flatMap(mapper);
assertThat(actual).isEqualTo(tuple);
}
