}
        return result.toString();
    }

    /**
     * Constructs an NbtException with the specified error class and code.
     *
     * @param errorClass the NetBIOS error class
     * @param errorCode the NetBIOS error code
     */
    public NbtException(final int errorClass, final int errorCode) {
        super(getErrorString(errorClass, errorCode));

        }
        return result.toString();
    }

    /**
     * Constructs an NbtException with the specified error class and code.
     *
     * @param errorClass the NetBIOS error class
     * @param errorCode the NetBIOS error code
     */
    public NbtException(final int errorClass, final int errorCode) {
        super(getErrorString(errorClass, errorCode));

                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"),
                Arguments.of(NbtException.ERR_NAM_SRVC, NbtException.CFT_ERR, "ERR_NAM_SRVC/Unknown error code: 7"),

    }

    @Test
    @DisplayName("toString includes class, code and error string")
    void testToString() {
        NbtException e = new NbtException(NbtException.ERR_SSN_SRVC, NbtException.NO_RESOURCES);
        String str = e.toString();
        assertTrue(str.contains("errorClass=2"));

            final int errorCode = in.read() & 0xFF;
            close();
            throw new NbtException(NbtException.ERR_SSN_SRVC, errorCode);
        case -1:
            throw new NbtException(NbtException.ERR_SSN_SRVC, NbtException.CONNECTION_REFUSED);
        default:
            close();
            throw new NbtException(NbtException.ERR_SSN_SRVC, 0);
        }
    }

    @Override

                disconnect(true);
                throw new NbtException(NbtException.ERR_SSN_SRVC, NbtException.CONNECTION_REFUSED);
            default:
                disconnect(true);
                throw new NbtException(NbtException.ERR_SSN_SRVC, 0);
            }
        } while ((calledName.name = address.nextCalledName()) != null);

        throw new IOException("Failed to establish session with " + address);
    }

                disconnect(true);
                throw new NbtException(NbtException.ERR_SSN_SRVC, NbtException.CONNECTION_REFUSED);
            default:
                disconnect(true);
                throw new NbtException(NbtException.ERR_SSN_SRVC, 0);
            }
        } while ((calledName.name = this.address.nextCalledName(tc)) != null);

        throw new IOException("Failed to establish session with " + this.address);
    }