sort(list, c);
    assertThat(list).containsExactly(8, 6, 7, 5, 3, 0, 9).inOrder();
    reserializeAndAssert(c);
  }

  @SuppressWarnings("DistinctVarargsChecker") // test of buggy call
  public void testExplicit_withDuplicates() {
    assertThrows(IllegalArgumentException.class, () -> Ordering.explicit(1, 2, 3, 4, 2));
  }

  // A more limited test than the one that follows, but this one uses the
  // actual public API.

    sort(list, c);
    assertThat(list).containsExactly(8, 6, 7, 5, 3, 0, 9).inOrder();
    reserializeAndAssert(c);
  }

  @SuppressWarnings("DistinctVarargsChecker") // test of buggy call
  public void testExplicit_withDuplicates() {
    assertThrows(IllegalArgumentException.class, () -> Ordering.explicit(1, 2, 3, 4, 2));
  }

  // A more limited test than the one that follows, but this one uses the
  // actual public API.