.isEqualTo(0xff1a618b7f65ea12L);
    assertThat(UnsignedLongs.parseUnsignedLong("6504067269626408013"))
        .isEqualTo(0x5a4316b8c153ac4dL);
    assertThat(UnsignedLongs.parseUnsignedLong("7851896530399809066"))
        .isEqualTo(0x6cf78a4b139a4e2aL);
  }

  public void testParseLongEmptyString() {
    assertThrows(NumberFormatException.class, () -> UnsignedLongs.parseUnsignedLong(""));
  }