}

        @Test
        @DisplayName("Unspecified SessionId should be 0xFFFFFFFFFFFFFFFF")
        void testUnspecifiedSessionId() {
            assertEquals(0xFFFFFFFFFFFFFFFFL, Smb2Constants.UNSPECIFIED_SESSIONID, "Unspecified SessionId must be 0xFFFFFFFFFFFFFFFF");
            assertEquals(-1L, Smb2Constants.UNSPECIFIED_SESSIONID, "Unspecified SessionId as signed long should be -1");
        }

    assertThrows(
        NumberFormatException.class, () -> UnsignedLongs.parseUnsignedLong("18446744073709551616"));
  }

  public void testDecodeLong() {
    assertThat(UnsignedLongs.decode("0xffffffffffffffff")).isEqualTo(0xffffffffffffffffL);
    assertThat(UnsignedLongs.decode("01234567")).isEqualTo(01234567); // octal
    assertThat(UnsignedLongs.decode("#1234567890abcdef")).isEqualTo(0x1234567890abcdefL);

   * unless the user is actually calling a parse method.
   */
  private static final class ParseOverflowDetection {
    private ParseOverflowDetection() {}

    // calculated as 0xffffffffffffffff / radix
    static final long[] maxValueDivs = new long[Character.MAX_RADIX + 1];
    static final int[] maxValueMods = new int[Character.MAX_RADIX + 1];