* Test getMessageByDcerpcError() with an unknown error code.
     */
    @Test
    void testGetMessageByDcerpcError_unknownCode() {
        int unknownCode = 0x99999999;
        String message = DcerpcException.getMessageByDcerpcError(unknownCode);
        assertEquals("0x99999999", message, "Should return hex string for unknown error code.");
    }

    /**
     * Test getMessageByDcerpcError() with an error code smaller than any known.

		{"-1.999999", time.Unix(-1, -1e9+1e3), true},
		{"-1.999999999", time.Unix(-1, -1e9+1e0), true},
		{"0.000000001", time.Unix(0, 1e0+0e0), true},
		{"0.000001", time.Unix(0, 1e3+0e0), true},
		{"0.001000", time.Unix(0, 1e6+0e0), true},
		{"0", time.Unix(0, 0e0), true},
		{"0.999000", time.Unix(0, 1e9-1e6), true},
		{"0.999999", time.Unix(0, 1e9-1e3), true},
		{"0.999999999", time.Unix(0, 1e9-1e0), true},

This line is completely invalid
:NoKey
NoValue:
:::
   :

# Case 13: Numeric crawl-delay edge cases
User-agent: NumericBot
Crawl-delay: 0
Crawl-delay: 999999999
Crawl-delay: 1.23e10

# Case 14: Tab characters instead of spaces
User-agent:	TabBot
Disallow:	/tab1/
Allow:	/tab2/

# Case 15: Unicode and special characters in user-agent
User-agent: Bot™

    assertNull(Punycode.decode("xn--cat-ñ3h"))
  }

  @Test fun unterminatedCodePoint() {
    assertNull(Punycode.decode("xn--cat-n"))
  }

  @Test fun overflowI() {
    assertNull(Punycode.decode("xn--99999999"))
  }

  @Test fun overflowMaxCodePoint() {
    assertNull(Punycode.decode("xn--a-b.net"))
    assertNull(Punycode.decode("xn--a-9b.net"))
    assertEquals("a՚.net", Punycode.decode("xn--a-99b.net"))

            } else if (token.length() <= 0) {
                ranges.add(new RangeValue("", false));
            }
        }
        if (ranges.size() < 2) {
            ranges.add(new RangeValue("99999999", false));
        }
        return ranges;
    }

    private static class RangeValue {
        private String value;

        private boolean closed;