this.openFlags &= ~(SmbConstants.O_CREAT | SmbConstants.O_TRUNC); /* in case we close and reopen */
        this.writeSize = sendBufferSize - 70;

        this.useNTSmbs = th.hasCapability(SmbConstants.CAP_NT_SMBS);
        if (!this.useNTSmbs) {
            log.debug("No support for NT SMBs");
        }

        // there seems to be a bug with some servers that causes corruption if using signatures +

                req.setFileInformation(new FileEndOfFileInformation(newLength));
                th.send(req, RequestParam.NO_RETRY);
            } else if (th.hasCapability(SmbConstants.CAP_NT_SMBS)) {
                th.send(new Trans2SetFileInformation(th.getConfig(), fh.getFid(), new FileEndOfFileInformation(newLength)),
                        new Trans2SetFileInformationResponse(th.getConfig()), RequestParam.NO_RETRY);

        when(tree.getReceiveBufferSize()).thenReturn(1024);
        when(tree.getSendBufferSize()).thenReturn(1024);
        when(tree.hasCapability(anyInt())).thenAnswer(inv -> ntSmbsCap && inv.getArgument(0).equals(SmbConstants.CAP_NT_SMBS));
        when(tree.areSignaturesActive()).thenReturn(false);
        when(tree.isSMB2()).thenReturn(smb2);

        when(file.openUnshared(anyInt(), anyInt(), anyInt(), anyInt(), anyInt())).thenReturn(fh);

                    | (this.useUnicode || this.forceUnicode ? SmbConstants.FLAGS2_UNICODE : 0);
        }

        if (this.capabilities == 0) {
            this.capabilities = (this.useNTSmbs ? SmbConstants.CAP_NT_SMBS : 0) | (this.useNtStatus ? SmbConstants.CAP_STATUS32 : 0)
                    | (this.useExtendedSecurity ? SmbConstants.CAP_EXTENDED_SECURITY : 0)
                    | (this.useLargeReadWrite ? SmbConstants.CAP_LARGE_READX : 0)