assertWithMessage(UnsignedLongs.toString(value))
          .that(UnsignedLong.fromLongBits(value).bigIntegerValue())
          .isEqualTo(expected);
    }
  }

  public void testValueOfLong() {
    for (long value : TEST_LONGS) {
      boolean expectSuccess = value >= 0;
      try {
        assertThat(UnsignedLong.valueOf(value).longValue()).isEqualTo(value);
        assertThat(expectSuccess).isTrue();