String expected = "ERR_NAM_SRVC/Unknown error code: 99";
        assertEquals(expected, NbtException.getErrorString(NbtException.ERR_NAM_SRVC, unknown));
    }

    @ParameterizedTest(name = "session error {1} -\\u003e {2}")
    @CsvSource({ "-1,Connection refused", "0x80,Not listening on called name", "0x81,Not listening for calling name",

     */
    @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.
     */
    @Test

        case FileSystemInformation.FS_FULL_SIZE_INFO -> new FileFsFullSizeInformation();
        case FileSystemInformation.FS_SIZE_INFO -> new FileFsSizeInformation();
        default -> throw new SMBProtocolDecodingException("Unknown filesystem info class " + infoClass);
        };
    }

    /**
     * @param infoClass
     * @return
     * @throws SMBProtocolDecodingException
     */

/*
 [Test Mail]
*/
subject: [FESS] Test Mail: /*pmb.hostname:orElse('Unknown')*/
>>>

/*
 [Crawler Notification]
*/
subject: [FESS] Status Change: /*pmb.hostname:orElse('Unknown')*/
>>>
--- Server Info ---
Cluster Name: /*pmb.clustername:orElse('Unknown')*/
Host Name: /*pmb.hostname:orElse('Unknown')*/

--- Status ---

    }

    @Test
    @DisplayName("Unknown DOS error code yields empty Optional")
    void testUnknownCode() {
        Optional<Integer> noMatch = findNtStatus(0xdeadbeef);
        assertFalse(noMatch.isPresent(), "Mapping for unknown code should be absent");
    }

    @Test
    @DisplayName("Mocked consumer receives correct NTSTATUS value")

            case UNSPECIFIED:
                result.append("Unspecified error");
                break;
            default:
                result.append("Unknown error code: ").append(errorCode);
            }
            break;
        default:
            result.append("unknown error class: ").append(errorClass);
        }
        return result.toString();
    }

    /**

                Arguments.of(NbtException.ERR_NAM_SRVC, NbtException.IMP_ERR, "ERR_NAM_SRVC/Unknown error code: 4"),
                Arguments.of(NbtException.ERR_NAM_SRVC, NbtException.RFS_ERR, "ERR_NAM_SRVC/Unknown error code: 5"),
                Arguments.of(NbtException.ERR_NAM_SRVC, NbtException.ACT_ERR, "ERR_NAM_SRVC/Unknown error code: 6"),

    }

    // Edge: unknown service returns null per stub
    @Test
    @DisplayName("getSmbTree unknown service returns null as stubbed")
    void getSmbTree_unknownService() {
        when(session.getSmbTree(eq("share"), eq("UNKNOWN"))).thenReturn(null);
        assertNull(session.getSmbTree("share", "UNKNOWN"));
        verify(session).getSmbTree("share", "UNKNOWN");
    }

        }

        @ParameterizedTest
        @DisplayName("Should handle various default values")
        @ValueSource(strings = { "text/unknown", "application/x-unknown", "custom/type", "" })
        void testVariousDefaultValues(String defaultValue) throws IOException {
            assertEquals(defaultValue, mimeMap.getMimeType("notinmap", defaultValue));
        }
    }