void testIntToHexString() {
        // Test various integer values
        assertEquals("00000000", Hexdump.toHexString(0, 8));
        assertEquals("000000FF", Hexdump.toHexString(255, 8));
        assertEquals("00001000", Hexdump.toHexString(4096, 8));
        assertEquals("FFFFFFFF", Hexdump.toHexString(-1, 8));

        // Test different sizes
        assertEquals("00", Hexdump.toHexString(0, 2));

  @Test
  fun hostIpv6WithIpv4SuffixWithHexadecimalPrefix() {
    // Chrome interprets a leading '0x' as hexadecimal; Firefox rejects them. (We reject them.)
    assertInvalid(
      "http://[0:0:0:0:0:1:0.0x10.0.0x10]/",
      "Invalid URL host: \"[0:0:0:0:0:1:0.0x10.0.0x10]\"",
    )
  }

  @Test
  fun hostIpv6WithMalformedIpv4Suffix() {
    assertInvalid(
      "http://[0:0:0:0:0:1:0.0:0.0]/",

		{+1, +1e0 - 0e0, "1.000000001"},
		{0, 1e9 - 1e0, "0.999999999"},
		{0, 1e9 - 1e3, "0.999999"},
		{0, 1e9 - 1e6, "0.999"},
		{0, 0e0, "0"},
		{0, 1e6 + 0e0, "0.001"},
		{0, 1e3 + 0e0, "0.000001"},
		{0, 1e0 + 0e0, "0.000000001"},
		{-1, -1e9 + 1e0, "-1.999999999"},
		{-1, -1e9 + 1e3, "-1.999999"},
		{-1, -1e9 + 1e6, "-1.999"},
		{-1, -0e0 + 0e0, "-1"},
		{-1, -1e6 + 0e0, "-1.001"},

        src[srcIndex] = 0x04;

        // B-node (00)
        System.arraycopy("BNODE           ".getBytes("US-ASCII"), 0, src, srcIndex + 1, 16);
        src[srcIndex + 16] = 0x00;
        src[srcIndex + 17] = 0x04; // 00000100 - B-node, active

        // P-node (01)
        System.arraycopy("PNODE           ".getBytes("US-ASCII"), 0, src, srcIndex + 19, 16);
        src[srcIndex + 34] = 0x00;

    }

    @Test
    @DisplayName("Should check capability correctly")
    void testHaveCapability() throws Exception {
        // Given
        setPrivateField(response, "commonCapabilities", 0x2F); // 0010 1111

        // Then
        assertTrue(response.haveCapabilitiy(0x01)); // Has this bit
        assertTrue(response.haveCapabilitiy(0x0F)); // Has all these bits