### Question:
Tuple7 extends Tuple6<T1, T2, T3, T4, T5, T6> implements Tuple { @Override public String toString() { return "Tuple{" + "item1=" + item1 + ",item2=" + item2 + ",item3=" + item3 + ",item4=" + item4 + ",item5=" + item5 + ",item6=" + item6 + ",item7=" + item7 + '}'; } Tuple7(T1 a, T2 b, T3 c, T4 d, T5 e, T6 f, T7 g); static Tuple7<T1, T2, T3, T4, T5, T6, T7> of(T1 a, T2 b, T3 c, T4 d, T5 e, T6 f, T7 g); T7 getItem7(); @Override Tuple7<T, T2, T3, T4, T5, T6, T7> mapItem1(Function<T1, T> mapper); @Override Tuple7<T1, T, T3, T4, T5, T6, T7> mapItem2(Function<T2, T> mapper); @Override Tuple7<T1, T2, T, T4, T5, T6, T7> mapItem3(Function<T3, T> mapper); @Override Tuple7<T1, T2, T3, T, T5, T6, T7> mapItem4(Function<T4, T> mapper); @Override Tuple7<T1, T2, T3, T4, T, T6, T7> mapItem5(Function<T5, T> mapper); @Override Tuple7<T1, T2, T3, T4, T5, T, T7> mapItem6(Function<T6, T> mapper); Tuple7<T1, T2, T3, T4, T5, T6, T> mapItem7(Function<T7, T> mapper); @Override Object nth(int index); @Override List<Object> asList(); @Override int size(); @Override String toString(); @Override boolean equals(Object o); @Override int hashCode();  }### Answer:
@Test public void testToString() { for (int i = 1; i <= someTuple.size(); i++) { assertThat(someTuple.toString()).contains("item" + i + "=" + someTuple.nth(i - 1)); } }