assertEquals(msg, ex.getMessage(), "Message should be stored as provided");
        }
        assertNull(ex.getCause(), "Cause should be null for message-only ctor");
        assertEquals(NtStatus.NT_STATUS_UNSUCCESSFUL, ex.getNtStatus(), "Status should default to unsuccessful for message ctor");
    }

    // Happy path: message + cause constructor should chain cause and set unsuccessful status
    @ParameterizedTest
    @NullSource

        SmbEndOfFileException ex = new SmbEndOfFileException();

        // Assert
        assertEquals("Unexpectedly reached end of file", ex.getMessage(), "Default message must match");
        assertEquals(NtStatus.NT_STATUS_UNSUCCESSFUL, ex.getNtStatus(), "Default NT status should be UNSUCCESSFUL");
        assertNull(ex.getCause(), "Cause should be null by default");
        assertNull(ex.getRootCause(), "Root cause should be null by default");

                log.warn("Auth failed", sae);
            } catch (final SmbException se) {
                log.warn("Connection failed", se);
                if (se.getNtStatus() != NtStatus.NT_STATUS_UNSUCCESSFUL) {
                    throw se;
                }
            }
            if (dirents[i].isDirectory()) {
                dirCount++;
            } else {
                fileCount++;

            } catch (final SmbException se) {
                if (LogStream.level > 2) {
                    se.printStackTrace(log);
                }
                if (se.getNtStatus() != NtStatus.NT_STATUS_UNSUCCESSFUL) {
                    throw se;
                }
            }
            if (dirents[i].isDirectory()) {
                dirCount++;
            } else {
                fileCount++;

            } catch (final SmbException ex) {
                switch (ex.getNtStatus()) {
                case NtStatus.NT_STATUS_INVALID_INFO_CLASS:
                case NtStatus.NT_STATUS_UNSUCCESSFUL: // NetApp Filer
                    // SMB_FS_FULL_SIZE_INFORMATION not supported by the server.
                    level = Trans2QueryFSInformationResponse.SMB_INFO_ALLOCATION;

        } catch (final SmbException ex) {
            log.debug("getDiskFreeSpace", ex);
            switch (ex.getNtStatus()) {
            case NtStatus.NT_STATUS_INVALID_INFO_CLASS:
            case NtStatus.NT_STATUS_UNSUCCESSFUL: // NetApp Filer
                if (!th.isSMB2()) {
                    // SMB_FS_FULL_SIZE_INFORMATION not supported by the server.