assertWithMessage("%s, %s (expected: %s, actual%s)", x, y, expected, actual)
              .that(actual > 0)
              .isTrue();
        }
      }
    }
  }

  public void testMax_noArgs() {
    assertThrows(IllegalArgumentException.class, () -> max());
  }

  public void testMax() {
    assertThat(max(LEAST)).isEqualTo(LEAST);
    assertThat(max(GREATEST)).isEqualTo(GREATEST);