/*
 * DavMail POP/IMAP/SMTP/CalDav/LDAP Exchange Gateway
 * Copyright (C) 2010  Mickael Guessant
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package davmail.imap;

import davmail.Settings;
import davmail.exchange.ExchangeSession;

import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.internet.MimeMessage;
import javax.mail.util.SharedByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Locale;
import java.util.Random;

/**
 * IMAP tests, an instance of DavMail Gateway must be available
 */
@SuppressWarnings({"JavaDoc", "UseOfSystemOutOrSystemErr"})
public class TestImap extends AbstractImapTestCase {

    protected String getLastMonth() {
        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.MONTH, -1);
        SimpleDateFormat formatter = new SimpleDateFormat("dd-MMM-yyyy", Locale.ENGLISH);
        formatter.setTimeZone(ExchangeSession.GMT_TIMEZONE);
        return formatter.format(calendar.getTime());
    }

    public void testListFolders() throws IOException {
        writeLine(". LSUB \"\" \"*\"");
        assertEquals(". OK LSUB completed", readFullAnswer("."));
    }

    public void testListSubFolders() throws IOException {
        writeLine(". LIST \"\" \"INBOX*\"");
        assertEquals(". OK LIST completed", readFullAnswer("."));
    }

    public void testSelectInbox() throws IOException {
        writeLine(". SELECT INBOX");
        assertEquals(". OK [READ-WRITE] SELECT completed", readFullAnswer("."));
    }

    public void testSelectRoot() throws IOException {
        writeLine(". SELECT \"\"");
        assertEquals(". OK [READ-WRITE] SELECT completed", readFullAnswer("."));
    }

    public void testFetchFlags() throws IOException {
        writeLine(". UID FETCH 1:* (FLAGS)");
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testUidSearchUnDeleted() throws IOException {
        writeLine(". UID SEARCH UNDELETED");
        assertEquals(". OK SEARCH completed", readFullAnswer("."));
        writeLine(". UID SEARCH NOT DELETED");
        assertEquals(". OK SEARCH completed", readFullAnswer("."));
    }

    public void testUidSearchdeleted() throws IOException {
        testSelectInbox();
        writeLine(". UID SEARCH DELETED");
        assertEquals(". OK SEARCH completed", readFullAnswer("."));
    }

    public void testStoreUndelete() throws IOException {
        writeLine(". UID STORE 10 -FLAGS (\\Deleted)");
        readFullAnswer(".");
    }

    public void testCreateFolder() throws IOException {
        writeLine(". DELETE testfolder");
        readFullAnswer(".");
        writeLine(". CREATE testfolder");
        assertEquals(". OK folder created", readFullAnswer("."));
        writeLine(". SELECT testfolder");
        assertEquals(". OK [READ-WRITE] SELECT completed", readFullAnswer("."));
    }

    public void testFetchBigMessage() throws IOException, MessagingException {
        testCreateFolder();
        // create 10MB message
        MimeMessage mimeMessage = new MimeMessage((Session) null);
        mimeMessage.addHeader("to", Settings.getProperty("davmail.to"));
        mimeMessage.addHeader("bcc", Settings.getProperty("davmail.bcc"));
        Random random = new Random();
        StringBuilder randomText = new StringBuilder();
        for (int i = 0; i < 10 * 1024 * 1024; i++) {
            randomText.append((char) ('a' + random.nextInt(26)));
        }
        mimeMessage.setText(randomText.toString());
        mimeMessage.setSubject("Big subject");
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        mimeMessage.writeTo(baos);
        byte[] content = baos.toByteArray();
        long start = System.currentTimeMillis();
        writeLine(". APPEND testfolder (\\Seen \\Draft) {" + content.length + '}');
        assertEquals("+ send literal data", readLine());
        writeLine(new String(content));
        assertEquals(". OK APPEND completed", readFullAnswer("."));
        System.out.println("Create time: " + (System.currentTimeMillis() - start) + " ms");
        writeLine(". NOOP");
        assertEquals(". OK NOOP completed", readFullAnswer("."));
        start = System.currentTimeMillis();
        writeLine(". UID FETCH 1:* (RFC822.SIZE BODY.TEXT)");
        readFullAnswer(".");
        System.out.println("Fetch time: " + (System.currentTimeMillis() - start) + " ms");

    }


    public void testSelectFolder() throws IOException {
        writeLine(". SELECT testfolder");
        assertEquals(". OK [READ-WRITE] SELECT completed", readFullAnswer("."));
    }

    public void testCreateMessage() throws IOException, MessagingException {

        MimeMessage mimeMessage = new MimeMessage((Session) null);
        mimeMessage.addHeader("to", Settings.getProperty("davmail.to"));
        mimeMessage.addHeader("bcc", Settings.getProperty("davmail.bcc"));
        mimeMessage.setText("Test message");
        mimeMessage.setSubject("Test subject");
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        mimeMessage.writeTo(baos);
        byte[] content = baos.toByteArray();
        writeLine(". APPEND testfolder (\\Seen \\Draft) {" + content.length + '}');
        assertEquals("+ send literal data", readLine());
        writeLine(new String(content));
        assertEquals(". OK APPEND completed", readFullAnswer("."));
        writeLine(". NOOP");
        assertEquals(". OK NOOP completed", readFullAnswer("."));

        // fetch message uid
        writeLine(". UID FETCH 1:* (FLAGS)");
        String messageLine = readLine();
        int uidIndex = messageLine.indexOf("UID ") + 4;
        messageUid = messageLine.substring(uidIndex, messageLine.indexOf(' ', uidIndex));
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
        assertNotNull(messageUid);
    }

    public void testUidStoreDeletedFlag() throws IOException {

        // test deleted flag
        writeLine(". UID STORE " + messageUid + " +FLAGS (\\Deleted)");
        assertEquals(". OK STORE completed", readFullAnswer("."));
        writeLine(". UID FETCH " + messageUid + " (FLAGS)");
        assertEquals("* 1 FETCH (UID " + messageUid + " FLAGS (\\Seen \\Deleted \\Draft))", readLine());
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));

        // remove deleted flag
        writeLine(". UID STORE " + messageUid + " -FLAGS (\\Deleted)");
        assertEquals(". OK STORE completed", readFullAnswer("."));
        writeLine(". UID FETCH " + messageUid + " (FLAGS)");
        assertEquals("* 1 FETCH (UID " + messageUid + " FLAGS (\\Seen \\Draft))", readLine());
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));

    }

    public void testUidRemoveSeenFlag() throws IOException {
        // remove seen flag
        writeLine(". UID STORE " + messageUid + " FLAGS (\\Draft)");
        assertEquals(". OK STORE completed", readFullAnswer("."));
        writeLine(". UID FETCH " + messageUid + " (FLAGS)");
        assertEquals("* 1 FETCH (UID " + messageUid + " FLAGS (\\Draft))", readLine());
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testUidStoreForwardedFlag() throws IOException {
        // add forwarded flag
        writeLine(". UID STORE " + messageUid + " +FLAGS ($Forwarded)");
        assertEquals(". OK STORE completed", readFullAnswer("."));
        writeLine(". UID FETCH " + messageUid + " (FLAGS)");
        assertEquals("* 1 FETCH (UID " + messageUid + " FLAGS (\\Draft $Forwarded))", readLine());
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));

        // remove forwarded flag
        writeLine(". UID STORE " + messageUid + " -FLAGS ($Forwarded)");
        assertEquals(". OK STORE completed", readFullAnswer("."));
        writeLine(". UID FETCH " + messageUid + " (FLAGS)");
        assertEquals("* 1 FETCH (UID " + messageUid + " FLAGS (\\Draft))", readLine());
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testUidStoreAnsweredFlag() throws IOException {
        // add answered flag
        writeLine(". UID STORE " + messageUid + " +FLAGS (\\Answered)");
        assertEquals(". OK STORE completed", readFullAnswer("."));
        writeLine(". UID FETCH " + messageUid + " (FLAGS)");
        assertEquals("* 1 FETCH (UID " + messageUid + " FLAGS (\\Draft \\Answered))", readLine());
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));

        // remove answered flag
        writeLine(". UID STORE " + messageUid + " -FLAGS (\\Answered)");
        assertEquals(". OK STORE completed", readFullAnswer("."));
        writeLine(". UID FETCH " + messageUid + " (FLAGS)");
        assertEquals("* 1 FETCH (UID " + messageUid + " FLAGS (\\Draft))", readLine());
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testUidStoreJunkFlag() throws IOException {
        // add Junk flag
        writeLine(". UID STORE " + messageUid + " +FLAGS (Junk)");
        assertEquals(". OK STORE completed", readFullAnswer("."));
        writeLine(". UID FETCH " + messageUid + " (FLAGS)");
        assertEquals("* 1 FETCH (UID " + messageUid + " FLAGS (Junk \\Draft))", readLine());
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));

        // remove Junk flag
        writeLine(". UID STORE " + messageUid + " -FLAGS (Junk)");
        assertEquals(". OK STORE completed", readFullAnswer("."));
        writeLine(". UID FETCH " + messageUid + " (FLAGS)");
        assertEquals("* 1 FETCH (UID " + messageUid + " FLAGS (\\Draft))", readLine());
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testUidStoreSeenFlag() throws IOException {
        // add Junk flag
        writeLine(". UID STORE " + messageUid + " +FLAGS (\\Seen)");
        assertEquals(". OK STORE completed", readFullAnswer("."));
        writeLine(". UID FETCH " + messageUid + " (FLAGS)");
        assertEquals("* 1 FETCH (UID " + messageUid + " FLAGS (\\Seen \\Draft))", readLine());
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));

        // remove Junk flag
        writeLine(". UID STORE " + messageUid + " -FLAGS (\\Seen)");
        assertEquals(". OK STORE completed", readFullAnswer("."));
        writeLine(". UID FETCH " + messageUid + " (FLAGS)");
        assertEquals("* 1 FETCH (UID " + messageUid + " FLAGS (\\Draft))", readLine());
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testPartialFetch() throws IOException {
        writeLine(". UID FETCH " + messageUid + " (BODY.PEEK[1.MIME])");
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testHeaderFetch() throws IOException {
        writeLine(". UID FETCH " + messageUid + " (BODY[HEADER.FIELDS (DATE SUBJECT FROM CONTENT-TYPE TO CC BCC MESSAGE-ID IN-REPLY-TO REFERENCES)])");
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testHeaderBodyFetch() throws IOException {
        writeLine(". UID FETCH " + messageUid + " (UID BODY.PEEK[HEADER.FIELDS (Content-Type Content-Transfer-Encoding)] BODY.PEEK[TEXT]<0.2048>)");
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testFetchInternalDate() throws IOException {
        writeLine(". UID FETCH " + messageUid + " (INTERNALDATE)");
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }


    public void testDeleteFolder() throws IOException {
        writeLine(". DELETE testfolder");
        assertEquals(". OK folder deleted", readFullAnswer("."));
    }

    public void testLogout() throws IOException {
        writeLine(". LOGOUT");
        assertEquals("* BYE Closing connection", socketReader.readLine());
        assertEquals(". OK LOGOUT completed", socketReader.readLine());
        clientSocket = null;
    }

    public void testCopyMessage() throws IOException, InterruptedException, MessagingException {
        testCreateFolder();
        testCreateMessage();
        writeLine(". UID FETCH 1:* (FLAGS)");
        String messageLine = readLine();
        int uidIndex = messageLine.indexOf("UID ") + 4;
        messageUid = messageLine.substring(uidIndex, messageLine.indexOf(' ', uidIndex));
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));

        writeLine(". UID COPY " + messageUid + " Trash");
        assertEquals(". OK copy completed", readFullAnswer("."));

        writeLine(". COPY 1 Trash");
        assertEquals(". OK copy completed", readFullAnswer("."));

        testDeleteFolder();
    }

    public void testFetchInboxEnvelope() throws IOException {
        testSelectInbox();
        writeLine(". UID FETCH 1:* (ENVELOPE)");
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testFetchInboxBodyStructure() throws IOException {
        testSelectInbox();
        writeLine(". UID FETCH 1:* (BODYSTRUCTURE)");
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testFetchRfc822Header() throws IOException {
        testSelectInbox();
        writeLine(". UID FETCH 1:* (UID RFC822.HEADER RFC822.SIZE FLAGS)");
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testThunderbirdHeaderFetch() throws IOException {
        testSelectInbox();
        writeLine(". UID FETCH 1:* (UID RFC822.SIZE FLAGS BODY.PEEK[HEADER.FIELDS (From To Cc Bcc Subject Date Message-ID Priority X-Priority References Newsgroups In-Reply-To Content-Type)])");
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testSearchHeader() throws IOException {
        testSelectInbox();
        writeLine(". UID SEARCH HEADER X-TUID testvalue");
        assertEquals(". OK SEARCH completed", readFullAnswer("."));
        writeLine(". UID SEARCH HEADER X-OfflineIMAP \"testvalue\"");
        assertEquals(". OK SEARCH completed", readFullAnswer("."));
    }

    public void testSearchUndraft() throws IOException {
        testSelectInbox();
        writeLine(". UID SEARCH UNDRAFT");
        assertEquals(". OK SEARCH completed", readFullAnswer("."));
        writeLine(". UID SEARCH DRAFT");
        assertEquals(". OK SEARCH completed", readFullAnswer("."));
    }

    public void testBrokenPipe() throws IOException, InterruptedException {
        testSelectInbox();
        writeLine(". UID FETCH 1:* (RFC822.SIZE BODY.TEXT)");
        socketReader.readLine();
        // force close connection
        clientSocket.close();
        Thread.sleep(5000);
    }

    public void testSearchCharset() throws IOException {
        testSelectInbox();
        writeLine("UID SEARCH CHARSET UTF-8 (HEADER SUBJECT testé)");
        assertEquals(". OK SEARCH completed", readFullAnswer("."));
    }

    public void testWanderLust() throws IOException {
        testSelectInbox();
        writeLine(". uid fetch 1:* (body.peek[header.fields (Subject From To Cc Date Message-Id References In-Reply-To Delivered-To)] rfc822.size flags)");
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testSearchSince() throws IOException {
        testSelectInbox();
        writeLine(". UID SEARCH SINCE 1-Jan-2012 UNDELETED");
        assertEquals(". OK SEARCH completed", readFullAnswer("."));
    }

    public void testSearchText() throws IOException {
        testSelectInbox();
        writeLine(". UID SEARCH TEXT test");
        assertEquals(". OK SEARCH completed", readFullAnswer("."));
    }


    public void testDraftMessageMessageId() throws IOException, InterruptedException, MessagingException {
        testCreateFolder();
        MimeMessage mimeMessage = new MimeMessage((Session) null);
        mimeMessage.addHeader("to", "testto <"+Settings.getProperty("davmail.to")+">");
        mimeMessage.setText("Test message");
        mimeMessage.setSubject("Test subject");
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        mimeMessage.writeTo(baos);
        byte[] content = baos.toByteArray();
        writeLine(". APPEND testfolder (\\Seen \\Draft) {" + content.length + '}');
        assertEquals("+ send literal data", readLine());
        writeLine(new String(content));
        assertEquals(". OK APPEND completed", readFullAnswer("."));

        writeLine(". UID SEARCH UNDELETED (HEADER Message-ID "+mimeMessage.getMessageID().substring(1, mimeMessage.getMessageID().length()-1)+")");
        assertEquals(". OK SEARCH completed", readFullAnswer("."));

        writeLine(". UID SEARCH (HEADER To "+Settings.getProperty("davmail.to")+")");
        assertEquals(". OK SEARCH completed", readFullAnswer("."));

        writeLine(". UID SEARCH (HEADER To testto)");
        assertEquals(". OK SEARCH completed", readFullAnswer("."));

        //testDeleteFolder();
    }

    public void testFetchOSX() throws IOException {
        testSelectInbox();
        writeLine(". FETCH 1:* (FLAGS UID BODY.PEEK[HEADER.FIELDS (content-class)])");
        assertEquals(". OK FETCH completed", readFullAnswer("."));
    }

    public void testFetchHeadersThunderbird() throws IOException {
        testSelectInbox();
        writeLine(". FETCH 1:* (UID RFC822.SIZE FLAGS BODY.PEEK[HEADER.FIELDS (From To Cc Bcc Subject Date Message-ID Priority X-Priority References Newsgroups In-Reply-To Content-Type)])");
        assertEquals(". OK FETCH completed", readFullAnswer("."));
    }

    public void testInvalidMime() throws MessagingException, IOException {
        testCreateFolder();

        MimeMessage mimeMessage = new MimeMessage((Session) null);
        mimeMessage.addHeader("to", Settings.getProperty("davmail.to"));
        mimeMessage.addHeader("bcc", Settings.getProperty("davmail.bcc"));
        mimeMessage.setText("test");
        mimeMessage.setSubject("subject");
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        mimeMessage.writeTo(baos);
        byte[] content = baos.toByteArray();
        String invalidMessageContent = "MAIL FROM: " + Settings.getProperty("davmail.bcc") + "\n" +
                "RCPT TO: " + Settings.getProperty("davmail.to") + "\n\n" + new String(content, "UTF-8");

        mimeMessage = new MimeMessage((Session) null, new SharedByteArrayInputStream(invalidMessageContent.getBytes("UTF-8")));
        baos = new ByteArrayOutputStream();
        mimeMessage.writeTo(baos);

        content = baos.toByteArray();
        writeLine(". APPEND testfolder (\\Seen \\Draft) {" + content.length + '}');
        assertEquals("+ send literal data", readLine());
        writeLine(new String(content));
        assertEquals(". OK APPEND completed", readFullAnswer("."));
        writeLine(". NOOP");
        assertEquals(". OK NOOP completed", readFullAnswer("."));

        // fetch message uid
        writeLine(". UID FETCH 1:* (FLAGS BODYSTRUCTURE)");
        String messageLine = readLine();
        int uidIndex = messageLine.indexOf("UID ") + 4;
        messageUid = messageLine.substring(uidIndex, messageLine.indexOf(' ', uidIndex));
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
        assertNotNull(messageUid);

        testDeleteFolder();

    }

    public void testFetchHeadersSentThunderbird() throws IOException {
        writeLine(". SELECT Sent");
        //writeLine(". SELECT INBOX");
        assertEquals(". OK [READ-WRITE] SELECT completed", readFullAnswer("."));
        writeLine(". UID SEARCH (SINCE \"01-Jun-2012\")");
        assertEquals(". OK SEARCH completed", readFullAnswer("."));
        writeLine(". UID FETCH 6071:* (UID RFC822.SIZE FLAGS BODY.PEEK[HEADER.FIELDS (From To Cc Bcc Subject Date Message-ID Priority X-Priority References Newsgroups In-Reply-To Content-Type)])");
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testFetchHeadersInboxMutt() throws IOException {
        writeLine(". SELECT INBOX");
        assertEquals(". OK [READ-WRITE] SELECT completed", readFullAnswer("."));
        writeLine(". UID SEARCH (SINCE \""+getLastMonth()+"\")");
        String messageLine = readLine();
        int uidIndex = messageLine.indexOf(" ", "* SEARCH".length()) + 1;
        messageUid = messageLine.substring(uidIndex, messageLine.indexOf(' ', uidIndex));
        assertEquals(". OK SEARCH completed", readFullAnswer("."));
        System.out.println(messageUid);
        writeLine(". UID FETCH "+messageUid+":* (UID FLAGS INTERNALDATE RFC822.SIZE BODY.PEEK[HEADER.FIELDS (DATE FROM SUBJECT TO CC MESSAGE-ID REFERENCES CONTENT-TYPE CONTENT-DESCRIPTION IN-REPLY-TO REPLY-TO LINES LIST-POST X-LABEL)])");
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testFetchHeadersInboxOSX() throws IOException {
        writeLine(". SELECT INBOX");
        assertEquals(". OK [READ-WRITE] SELECT completed", readFullAnswer("."));
        writeLine(". UID SEARCH (SINCE \""+getLastMonth()+"\")");
        String messageLine = readLine();
        int uidIndex = messageLine.indexOf(" ", "* SEARCH".length()) + 1;
        messageUid = messageLine.substring(uidIndex, messageLine.indexOf(' ', uidIndex));
        assertEquals(". OK SEARCH completed", readFullAnswer("."));
        System.out.println(messageUid);
        writeLine(". UID FETCH "+messageUid+":* (INTERNALDATE UID RFC822.SIZE FLAGS BODY.PEEK[HEADER.FIELDS (date subject from to cc message-id in-reply-to references x-priority x-uniform-type-identifier x-universally-unique-identifier received-spf x-spam-status x-spam-flag)])");
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testSelectInboxTimeout() throws IOException {
        writeLine(". SELECT INBOX");
        // simulate client timeout
        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            // ignore
        }
        socketWriter.close();
        System.in.read();
    }

    public void testAnotherFetch() throws IOException {
        writeLine(". SELECT INBOX");
        assertEquals(". OK [READ-WRITE] SELECT completed", readFullAnswer("."));
        writeLine(". UID FETCH 1:* (BODY.PEEK [HEADER.FIELDS (References X-Ref X-Priority X-MSMail-Priority Importance X-MSOESRec Newsgroups)] ENVELOPE RFC822.SIZE UID FLAGS INTERNALDATE)");
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

    public void testDoubleHeaderFetch() throws IOException {
        writeLine(". SELECT INBOX");
        assertEquals(". OK [READ-WRITE] SELECT completed", readFullAnswer("."));
        writeLine(". UID FETCH 1:* RFC822.HEADER");
        assertEquals(". OK UID FETCH completed", readFullAnswer("."));
    }

}