/** The NetBIOS error class */
    public int errorClass;
    /** The NetBIOS error code */
    public int errorCode;

    /**
     * Converts NetBIOS error class and code to a human-readable string.
     *
     * @param errorClass the error class
     * @param errorCode the error code
     * @return a descriptive error string
     */

        @DisplayName("Should handle unknown result codes with hex format")
        void testUnknownResultCodes() throws Exception {
            // Test unknown result codes
            int[] unknownCodes = { 4, 10, 255, 1000 };

            for (int code : unknownCodes) {
                setResultField(bind, code);
                DcerpcException result = bind.getResult();

    for (i in CODE_BIT_COUNTS.indices) {
      addCode(i, CODES[i], CODE_BIT_COUNTS[i].toInt())
    }
  }

  @Throws(IOException::class)
  fun encode(
    source: ByteString,
    sink: BufferedSink,
  ) {
    var accumulator = 0L
    var accumulatorBitCount = 0

    for (i in 0 until source.size) {
      val symbol = source[i] and 0xff
      val code = CODES[symbol]

    @Override
    public ResolutionNode resolveConflict(ResolutionNode node1, ResolutionNode node2) {
        try {
            ArtifactVersion version1 = node1.getArtifact().getSelectedVersion();
            ArtifactVersion version2 = node2.getArtifact().getSelectedVersion();

            return version1.compareTo(version2) <= 0 ? node1 : node2;
        } catch (OverConstrainedVersionException exception) {

        // Verify different message codes
        assertEquals(unknownErrorCode, unknownException.getMessageCode());
        assertEquals(parseErrorCode, parseException.getMessageCode());
        assertNotSame(unknownException.getMessageCode(), parseException.getMessageCode());
    }

    public void test_complexMessageCode() {
        // Setup - test with a complex message code that includes parameters

 *   <li>comparing each pair of objects from different equality groups returns false
 *   <li>the hash codes of any two equal objects are equal
 * </ul>
 *
 * <p>When a test fails, the error message labels the objects involved in the failed comparison as
 * follows:
 *
 * <ul>
 *   <li>"{@code [group }<i>i</i>{@code , item }<i>j</i>{@code ]}" refers to the

    @DisplayName("Happy path: known DOS codes map to expected NTSTATUS")
    void mapsKnownDosCodesToNtStatus(int dosCode, int expectedNtStatus) {
        // Act
        int actual = findNtStatusOrMinusOne(dosCode);

        // Assert
        assertEquals(expectedNtStatus, actual, "Mapping must match table entry");
    }

    @Test
    @DisplayName("Edge: zero DOS code maps to zero NTSTATUS")
    void zeroCodeMapsToZero() {

                // Unknown code → hex string (uppercase)
                Arguments.of(0xDEADBEEF, "0xDEADBEEF"));
    }

    @ParameterizedTest
    @MethodSource("errorCodes")
    void constructorInitialisesMessageAndStatus(int code, String expectedMsg) {
        SmbAuthException e = new SmbAuthException(code);
        assertEquals(expectedMsg, e.getMessage(), "message for code " + Integer.toHexString(code));

        faultCodes.add(DcerpcError.DCERPC_FAULT_PROTO_ERROR);

        // Verify all 9 codes are unique
        assertEquals(9, faultCodes.size(), "All fault codes should be unique");
    }

    @Test
    @DisplayName("Should verify fault code value ranges and patterns")
    void testFaultCodeValueRanges() {
        // Standard fault codes (0x00000000 - 0x0000FFFF range)

The status codes in the 400 range mean that there was an error from the client.

Remember all those **"404 Not Found"** errors (and jokes)?

## Use `HTTPException` { #use-httpexception }

To return HTTP responses with errors to the client you use `HTTPException`.

### Import `HTTPException` { #import-httpexception }