want    uint64
		wantErr string
	}
	tests := []testCase{
		{"x", 0, "invalid byte in chunk length"},
		{"0000000000000000", 0, ""},
		{"0000000000000001", 1, ""},
		{"ffffffffffffffff", 1<<64 - 1, ""},
		{"FFFFFFFFFFFFFFFF", 1<<64 - 1, ""},
		{"000000000000bogus", 0, "invalid byte in chunk length"},
		{"00000000000000000", 0, "http chunk length too large"}, // could accept if we wanted

    assertThrows(NumberFormatException.class, () -> UnsignedLongs.parseUnsignedLong("0", -1));
  }

  public void testToString() {
    String[] tests = {
      "0",
      "ffffffffffffffff",
      "7fffffffffffffff",
      "ff1a618b7f65ea12",
      "5a4316b8c153ac4d",
      "6cf78a4b139a4e2a"
    };
    int[] bases = {2, 5, 7, 8, 10, 16};
    for (int base : bases) {
      for (String x : tests) {

        // Test various long values
        assertEquals("0000000000000000", Hexdump.toHexString(0L, 16));
        assertEquals("00000000000000FF", Hexdump.toHexString(255L, 16));
        assertEquals("FFFFFFFFFFFFFFFF", Hexdump.toHexString(-1L, 16));

        // Test different sizes
        assertEquals("00000000", Hexdump.toHexString(0L, 8));
        assertEquals("12345678", Hexdump.toHexString(0x12345678L, 8));
    }

        assertEquals("12345678", Hexdump.toHexString(0x12345678L, 8));
        assertEquals("5678", Hexdump.toHexString(0x12345678L, 4));

        // Test negative values (treated as unsigned)
        assertEquals("FFFFFFFFFFFFFFFF", Hexdump.toHexString(-1L, 16));
        assertEquals("FFFFFFFF", Hexdump.toHexString(-1L, 8));
        assertEquals("FFFF", Hexdump.toHexString(-1L, 4));
    }

    @Test

// Input Bounds: // // arg1: [0x0 ~> 0x1] // arg2: [[0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff]] // arg3: [[0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff]] // // Output Bounds: // // out1: [[0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff]] func p224Selectznz(out1 *[4]uint64, arg1 p224Uint1, arg2 *[4]uint64,...

        }

        @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");
        }

   * 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];