path: root/libbe/command/import_xml.py

                                                     
                                                          
# Copyright (C) 2009-2012 Chris Ball <cjb@laptop.org>
#                         Valtteri Kokkoniemi <rvk@iki.fi>
#                         W. Trevor King <wking@tremily.us>
#
# This file is part of Bugs Everywhere.
#
# Bugs Everywhere 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.
#
# Bugs Everywhere 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
# Bugs Everywhere.  If not, see <http://www.gnu.org/licenses/>.

import copy
import os
import sys
try: # import core module, Python >= 2.5
    from xml.etree import ElementTree
except ImportError: # look for non-core module
    from elementtree import ElementTree

import libbe
import libbe.bug
import libbe.bugdir
import libbe.command
import libbe.command.util
import libbe.comment
import libbe.util.encoding
import libbe.util.id
import libbe.util.utility

if libbe.TESTING == True:
    import doctest
    import io
    import unittest

    import libbe.bugdir


class Import_XML (libbe.command.Command):
    """Import comments and bugs from XML

    >>> import time
    >>> import StringIO
    >>> import libbe.bugdir
    >>> bd = libbe.bugdir.SimpleBugDir(memory=False)
    >>> io = libbe.command.StringInputOutput()
    >>> io.stdout = sys.stdout
    >>> ui = libbe.command.UserInterface(io=io)
    >>> ui.storage_callbacks.set_storage(bd.storage)
    >>> cmd = Import_XML(ui=ui)

    >>> ui.io.set_stdin('<be-xml><comment><uuid>c</uuid><body>This is a comment about a</body></comment></be-xml>')
    >>> ret = ui.run(cmd, {'root':'/a'}, ['-'])
    >>> bd.flush_reload()
    >>> bug = bd.bug_from_uuid('a')
    >>> bug.load_comments(load_full=False)
    >>> comment = bug.comment_root[0]
    >>> print(comment.body)
    This is a comment about a
    <BLANKLINE>
    >>> comment.time <= int(time.time())
    True
    >>> comment.in_reply_to is None
    True
    >>> ui.cleanup()
    >>> bd.cleanup()
    """
    name = 'import-xml'

    def __init__(self, *args, **kwargs):
        libbe.command.Command.__init__(self, *args, **kwargs)
        self.options.extend([
                libbe.command.Option(name='ignore-missing-references', short_name='i',
                    help="If any comment's <in-reply-to> refers to a non-existent comment, ignore it (instead of raising an exception)."),
                libbe.command.Option(name='add-only', short_name='a',
                    help='If any bug or comment listed in the XML file already exists in the bug repository, do not alter the repository version.'),
                libbe.command.Option(name='preserve-uuids', short_name='p',
                    help='Preserve UUIDs for trusted input (potential name collisions).'),
                libbe.command.Option(name='root', short_name='r',
                    help='Supply a bugdir, bug, or comment ID as the root of '
                    'any non-bugdir elements that are direct children of the '
                    '<be-xml> element.  If any such elements exist, you are '
                    'required to set this option.',
                    arg=libbe.command.Argument(
                        name='root', metavar='ID',
                        completion_callback=libbe.command.util.complete_bug_comment_id)),
                ])
        self.args.extend([
                libbe.command.Argument(
                    name='xml-file', metavar='XML-FILE'),
                ])

    def _run(self, **params):
        storage = self._get_storage()
        bugdirs = self._get_bugdirs()
        writeable = storage.writeable
        storage.writeable = False
        if params['root'] is not None:
            root_bugdir,root_bug,root_comment = (
                libbe.command.util.bugdir_bug_comment_from_user_id(
                    bugdirs, params['root']))
        else:
            root_bugdir,root_bug,root_comment = (None, None, None)

        xml = self._read_xml(storage, params)
        version,root_bugdirs,root_bugs,root_comments = self._parse_xml(
            xml, params)

        if params['add-only']:
            accept_changes = False
            accept_extra_strings = False
        else:
            accept_changes = True
            accept_extra_strings = True

        dirty_items = list(self._merge_comments(
                bugdirs, root_bug, root_comment, root_comments,
                params, accept_changes, accept_extra_strings))
        dirty_items.extend(self._merge_bugs(
                bugdirs, root_bugdir, root_bugs,
                params, accept_changes, accept_extra_strings))
        dirty_items.extend(self._merge_bugdirs(
                bugdirs, root_bugdirs,
                params, accept_changes, accept_extra_strings))

        # protect against programmer error causing data loss:
        if root_bug is not None:
            # check for each of the new comments
            comms = []
            for c in root_bug.comments():
                comms.append(c.uuid)
                if c.alt_id is not None:
                    comms.append(c.alt_id)
            if root_comment.uuid == libbe.comment.INVALID_UUID:
                root_text = root_bug.id.user()
            else:
                root_text = root_comment.id.user()
            for new in root_comments:
                assert new.uuid in comms or new.alt_id in comms, \
                    "comment %s (alt: %s) wasn't added to %s" \
                    % (new.uuid, new.alt_id, root_text)
        for new in root_bugs:
            # check for each of the new bugs
            try:
                libbe.command.util.bug_from_uuid(bugdirs, new.uuid)
            except libbe.bugdir.NoBugMatches:
                try:
                    libbe.command.util.bug_from_uuid(bugdirs, new.alt_id)
                except libbe.bugdir.NoBugMatches:
                    raise AssertionError(
                        "bug {} (alt: {}) wasn't added to {}".format(
                            new.uuid, new.alt_id, root_bugdir.id.user()))
        for new in root_bugdirs:
            assert new.uuid in bugdirs or new.alt_id in bugdirs, (
                "bugdir {} wasn't added to {}".format(
                    new.uuid, sorted(bugdirs.keys())))

        # save new information
        storage.writeable = writeable
        for item in dirty_items:
            item.save()

    def _read_xml(self, storage, params):
        if params['xml-file'] == '-':
            return self.stdin.read().encode(self.stdin.encoding)
        else:
            self._check_restricted_access(storage, params['xml-file'])
            return libbe.util.encoding.get_file_contents(params['xml-file'])

    def _parse_xml(self, xml, params):
        version = {}
        root_bugdirs = []
        root_bugs = []
        root_comments = []
        be_xml = ElementTree.XML(xml)
        if be_xml.tag != 'be-xml':
            raise libbe.util.utility.InvalidXML(
                'import-xml', be_xml, 'root element must be <be-xml>')
        for child in be_xml:
            if child.tag == 'bugdir':
                new = libbe.bugdir.BugDir(storage=None)
                new.from_xml(child, preserve_uuids=params['preserve-uuids'])
                root_bugdirs.append(new)
            elif child.tag == 'bug':
                new = libbe.bug.Bug()
                new.from_xml(child, preserve_uuids=params['preserve-uuids'])
                root_bugs.append(new)
            elif child.tag == 'comment':
                new = libbe.comment.Comment()
                new.from_xml(child, preserve_uuids=params['preserve-uuids'])
                root_comments.append(new)
            elif child.tag == 'version':
                for gchild in child:
                    if child.tag in ['tag', 'nick', 'revision', 'revision-id']:
                        text = xml.sax.saxutils.unescape(child.text)
                        text = text.decode('unicode_escape').strip()
                        version[child.tag] = text
                    else:
                        libbe.LOG.warning(
                            'ignoring unknown tag {0} in {1}\n'.format(
                                gchild.tag, child.tag))
            else:
                libbe.LOG.warning('ignoring unknown tag {0} in {1}\n'.format(
                        child.tag, be_xml.tag))
        return (version, root_bugdirs, root_bugs, root_comments)

    def _merge_comments(self, bugdirs, bug, root_comment, comments,
                        params, accept_changes, accept_extra_strings,
                        accept_comments=True):
        if len(comments) == 0:
            return
        if bug is None:
            raise libbe.command.UserError(
                'No root bug for merging comments:\n{}'.format(
                    '\n\n'.join([c.string() for c in comments])))
        bug.load_comments(load_full=True)
        if root_comment.uuid == libbe.comment.INVALID_UUID:
            root_comment = bug.comment_root
        else:
            root_comment = bug.comment_from_uuid(root_comment.uuid)
        new_bug = libbe.bug.Bug(bugdir=bug.bugdir, uuid=bug.uuid)
        new_bug.explicit_attrs = []
        new_bug.comment_root = copy.deepcopy(bug.comment_root)
        if root_comment.uuid == libbe.comment.INVALID_UUID:
            new_root_comment = new_bug.comment_root
        else:
            new_root_comment = new_bug.comment_from_uuid(
                root_comment.uuid)
        for new in new_bug.comments():
            new.explicit_attrs = []
        try:
            new_bug.add_comments(
                comments,
                default_parent=root_comment,
                ignore_missing_references=params['ignore-missing-references'])
        except libbe.comment.MissingReference as e:
            raise libbe.command.UserError(e)
        bug.merge(new_bug, accept_changes=accept_changes,
                  accept_extra_strings=accept_extra_strings,
                  accept_comments=accept_comments)
        yield bug

    def _merge_bugs(self, bugdirs, bugdir, bugs,
                    params, accept_changes, accept_extra_strings,
                    accept_comments=True):
        for new in bugs:
            try:
                old = bugdir.bug_from_uuid(new.alt_id)
            except KeyError:
                bugdir.append(new, update=True)
                yield new
            else:
                old.load_comments(load_full=True)
                old.merge(new, accept_changes=accept_changes,
                          accept_extra_strings=accept_extra_strings,
                          accept_comments=accept_comments)
                yield old

    def _merge_bugdirs(self, bugdirs, new_bugdirs,
                       params, accept_changes, accept_extra_strings,
                       accept_comments=True):
        for new in new_bugdirs:
            if new.alt_id in bugdirs:
                old = bugdirs[new.alt_id]
                old.load_all_bugs()
                old.merge(new, accept_changes=accept_changes,
                          accept_extra_strings=accept_extra_strings,
                          accept_bugs=True,
                          accept_comments=accept_comments)
                yield old
            else:
                bugdirs[new.uuid] = new
                new.storage = self._get_storage()
                yield new

    def _long_help(self):
        return """
Import comments and bugs from XMLFILE.  If XMLFILE is '-', the file is
read from stdin.

This command provides a fallback mechanism for passing bugs between
repositories, in case the repositories VCSs are incompatible.  If the
VCSs are compatible, it's better to use their builtin merge/push/pull
to share this information, as that will preserve a more detailed
history.

The XML file should be formatted similarly to:

  <be-xml>
    <version>
      <tag>1.0.0</tag>
      <branch-nick>be</branch-nick>
      <revno>446</revno>
      <revision-id>a@b.com-20091119214553-iqyw2cpqluww3zna</revision-id>
    <version>
    <bugdir>
      <bug>
        ...
        <comment>...</comment>
        <comment>...</comment>
      </bug>
      <bug>...</bug>
    </bugdir>
    <bug>...</bug>
    <bug>...</bug>
    <comment>...</comment>
    <comment>...</comment>
  </be-xml>

where the ellipses mark output commpatible with BugDir.xml(),
Bug.xml(), and Comment.xml().  Take a look at the output of `be show
--xml` for some explicit examples.  Unrecognized tags are ignored.
Missing tags are left at the default value.  The version tag is not
required, but is strongly recommended.

The bugdir, bug, and comment UUIDs are always auto-generated, so if
you set a <uuid> field, but no <alt-id> field, your <uuid> will be
used as the object's <alt-id>.  An exception is raised if <alt-id>
conflicts with an existing object.  Bugdirs and bugs do not have a
permantent alt-id, so they the <uuid>s you specify are not saved.  The
<uuid>s _are_ used to match agains prexisting bug and comment uuids,
and comment alt-ids, and fields explicitly given in the XML file will
replace old versions unless the --add-only flag.

*.extra_strings recieves special treatment, and if --add-only is not
set, the resulting list concatenates both source lists and removes
repeats.

Here's an example of import activity:
  Repository
   bugdir (uuid=abc123)
     bug (uuid=B, creator=John, status=open)
       estr (don't forget your towel)
       estr (helps with space travel)
       com (uuid=C1, author=Jane, body=Hello)
       com (uuid=C2, author=Jess, body=World)
  XML
   bugdir (uuid=abc123)
     bug (uuid=B, status=fixed)
       estr (don't forget your towel)
       estr (watch out for flying dolphins)
       com (uuid=C1, body=So long)
       com (uuid=C3, author=Jed, body=And thanks)
  Result
   bugdir (uuid=abc123)
     bug (uuid=B, creator=John, status=fixed)
       estr (don't forget your towel)
       estr (helps with space travel)
       estr (watch out for flying dolphins)
       com (uuid=C1, author=Jane, body=So long)
       com (uuid=C2, author=Jess, body=World)
       com (uuid=C4, alt-id=C3, author=Jed, body=And thanks)
  Result, with --add-only
   bugdir (uuid=abc123)
     bug (uuid=B, creator=John, status=open)
       estr (don't forget your towel)
       estr (helps with space travel)
       com (uuid=C1, author=Jane, body=Hello)
       com (uuid=C2, author=Jess, body=World)
       com (uuid=C4, alt-id=C3, author=Jed, body=And thanks)

Examples:

Import comments (e.g. emails from a mailbox) and append to bug /XYZ:

  $ be-mail-to-xml mail.mbox | be import-xml -r /XYZ -

Or you can append those emails underneath the prexisting comment /XYZ/3:

  $ be-mail-to-xml mail.mbox | be import-xml -r /XYZ/3 -

User creates a new bug:

  user$ be new "The demuxulizer is broken"
  Created bug with ID 48f
  user$ be comment 48f
  <Describe bug>
  ...

User exports bug as xml and emails it to the developers:

  user$ be show --xml 48f > 48f.xml
  user$ cat 48f.xml | mail -s "Demuxulizer bug xml" devs@b.com
or equivalently (with a slightly fancier be-handle-mail compatible
email):
  user$ be email-bugs 48f

Devs recieve email, and save it's contents as demux-bug.xml:

  dev$ cat demux-bug.xml | be import-xml -
"""


Import_xml = Import_XML # alias for libbe.command.base.get_command_class()

if libbe.TESTING == True:
    class LonghelpTestCase (unittest.TestCase):
        """
        Test import scenarios given in longhelp.
        """
        def setUp(self):
            self.bugdir = libbe.bugdir.SimpleBugDir(memory=False)
            io = libbe.command.StringInputOutput()
            self.ui = libbe.command.UserInterface(io=io)
            self.ui.storage_callbacks.set_storage(self.bugdir.storage)
            self.cmd = Import_XML(ui=self.ui)
            self.cmd._storage = self.bugdir.storage
            self.cmd._setup_io = lambda i_enc,o_enc : None
            bugA = self.bugdir.bug_from_uuid('a')
            self.bugdir.remove_bug(bugA)
            self.bugdir.storage.writeable = False
            bugB = self.bugdir.bug_from_uuid('b')
            bugB.creator = 'John'
            bugB.status = 'open'
            bugB.extra_strings += ["don't forget your towel"]
            bugB.extra_strings += ['helps with space travel']
            comm1 = bugB.comment_root.new_reply(body='Hello\n')
            comm1.uuid = 'c1'
            comm1.author = 'Jane'
            comm2 = bugB.comment_root.new_reply(body='World\n')
            comm2.uuid = 'c2'
            comm2.author = 'Jess'
            self.bugdir.storage.writeable = True
            bugB.save()
            self.xml = """
            <be-xml>
              <bugdir>
                <uuid>abc123</uuid>
                <bug>
                  <uuid>b</uuid>
                  <status>fixed</status>
                  <summary>a test bug</summary>
                  <extra-string>don't forget your towel</extra-string>
                  <extra-string>watch out for flying dolphins</extra-string>
                  <comment>
                    <uuid>c1</uuid>
                    <body>So long</body>
                  </comment>
                  <comment>
                    <uuid>c3</uuid>
                    <author>Jed</author>
                    <body>And thanks</body>
                  </comment>
                </bug>
              </bugdir>
            </be-xml>
            """
            self.root_comment_xml = """
            <be-xml>
              <comment>
                <uuid>c1</uuid>
                <body>So long</body>
              </comment>
              <comment>
                <uuid>c3</uuid>
                <author>Jed</author>
                <body>And thanks</body>
              </comment>
            </be-xml>
            """
        def tearDown(self):
            self.bugdir.cleanup()
            self.ui.cleanup()
        def _execute(self, xml, params={}, args=[]):
            self.ui.io.set_stdin(xml)
            self.ui.run(self.cmd, params, args)
            self.bugdir.flush_reload()
        def testCleanBugdir(self):
            uuids = list(self.bugdir.uuids())
            self.assertTrue(uuids == ['b'], uuids)
        def testNotAddOnly(self):
            bugB = self.bugdir.bug_from_uuid('b')
            self._execute(self.xml, {}, ['-'])
            uuids = list(self.bugdir.uuids())
            self.assertTrue(uuids == ['b'], uuids)
            bugB = self.bugdir.bug_from_uuid('b')
            self.assertTrue(bugB.uuid == 'b', bugB.uuid)
            self.assertTrue(bugB.creator == 'John', bugB.creator)
            self.assertTrue(bugB.status == 'fixed', bugB.status)
            self.assertTrue(bugB.summary == 'a test bug', bugB.summary)
            estrs = ["don't forget your towel",
                     'helps with space travel',
                     'watch out for flying dolphins']
            self.assertTrue(bugB.extra_strings == estrs, bugB.extra_strings)
            comments = list(bugB.comments())
            self.assertTrue(len(comments) == 3,
                            ['%s (%s, %s)' % (c.uuid, c.alt_id, c.body)
                             for c in comments])
            c1 = bugB.comment_from_uuid('c1')
            comments.remove(c1)
            self.assertTrue(c1.uuid == 'c1', c1.uuid)
            self.assertTrue(c1.alt_id is None, c1.alt_id)
            self.assertTrue(c1.author == 'Jane', c1.author)
            self.assertTrue(c1.body == 'So long\n', c1.body)
            c2 = bugB.comment_from_uuid('c2')
            comments.remove(c2)
            self.assertTrue(c2.uuid == 'c2', c2.uuid)
            self.assertTrue(c2.alt_id is None, c2.alt_id)
            self.assertTrue(c2.author == 'Jess', c2.author)
            self.assertTrue(c2.body == 'World\n', c2.body)
            c4 = comments[0]
            self.assertTrue(len(c4.uuid) == 36, c4.uuid)
            self.assertTrue(c4.alt_id == 'c3', c4.alt_id)
            self.assertTrue(c4.author == 'Jed', c4.author)
            self.assertTrue(c4.body == 'And thanks\n', c4.body)
        def testAddOnly(self):
            bugB = self.bugdir.bug_from_uuid('b')
            initial_bugB_summary = bugB.summary
            self._execute(self.xml, {'add-only':True}, ['-'])
            uuids = list(self.bugdir.uuids())
            self.assertTrue(uuids == ['b'], uuids)
            bugB = self.bugdir.bug_from_uuid('b')
            self.assertTrue(bugB.uuid == 'b', bugB.uuid)
            self.assertTrue(bugB.creator == 'John', bugB.creator)
            self.assertTrue(bugB.status == 'open', bugB.status)
            self.assertTrue(bugB.summary == initial_bugB_summary, bugB.summary)
            estrs = ["don't forget your towel",
                     'helps with space travel']
            self.assertTrue(bugB.extra_strings == estrs, bugB.extra_strings)
            comments = list(bugB.comments())
            self.assertTrue(len(comments) == 3,
                            ['%s (%s)' % (c.uuid, c.alt_id) for c in comments])
            c1 = bugB.comment_from_uuid('c1')
            comments.remove(c1)
            self.assertTrue(c1.uuid == 'c1', c1.uuid)
            self.assertTrue(c1.alt_id is None, c1.alt_id)
            self.assertTrue(c1.author == 'Jane', c1.author)
            self.assertTrue(c1.body == 'Hello\n', c1.body)
            c2 = bugB.comment_from_uuid('c2')
            comments.remove(c2)
            self.assertTrue(c2.uuid == 'c2', c2.uuid)
            self.assertTrue(c2.alt_id is None, c2.alt_id)
            self.assertTrue(c2.author == 'Jess', c2.author)
            self.assertTrue(c2.body == 'World\n', c2.body)
            c4 = comments[0]
            self.assertTrue(len(c4.uuid) == 36, c4.uuid)
            self.assertTrue(c4.alt_id == 'c3', c4.alt_id)
            self.assertTrue(c4.author == 'Jed', c4.author)
            self.assertTrue(c4.body == 'And thanks\n', c4.body)
        def testRootCommentsNotAddOnly(self):
            bugB = self.bugdir.bug_from_uuid('b')
            initial_bugB_summary = bugB.summary
            self._execute(self.root_comment_xml, {'root':'/b'}, ['-'])
            uuids = list(self.bugdir.uuids())
            uuids = list(self.bugdir.uuids())
            self.assertTrue(uuids == ['b'], uuids)
            bugB = self.bugdir.bug_from_uuid('b')
            self.assertTrue(bugB.uuid == 'b', bugB.uuid)
            self.assertTrue(bugB.creator == 'John', bugB.creator)
            self.assertTrue(bugB.status == 'open', bugB.status)
            self.assertTrue(bugB.summary == initial_bugB_summary, bugB.summary)
            estrs = ["don't forget your towel",
                     'helps with space travel']
            self.assertTrue(bugB.extra_strings == estrs, bugB.extra_strings)
            comments = list(bugB.comments())
            self.assertTrue(len(comments) == 3,
                            ['%s (%s, %s)' % (c.uuid, c.alt_id, c.body)
                             for c in comments])
            c1 = bugB.comment_from_uuid('c1')
            comments.remove(c1)
            self.assertTrue(c1.uuid == 'c1', c1.uuid)
            self.assertTrue(c1.alt_id is None, c1.alt_id)
            self.assertTrue(c1.author == 'Jane', c1.author)
            self.assertTrue(c1.body == 'So long\n', c1.body)
            c2 = bugB.comment_from_uuid('c2')
            comments.remove(c2)
            self.assertTrue(c2.uuid == 'c2', c2.uuid)
            self.assertTrue(c2.alt_id is None, c2.alt_id)
            self.assertTrue(c2.author == 'Jess', c2.author)
            self.assertTrue(c2.body == 'World\n', c2.body)
            c4 = comments[0]
            self.assertTrue(len(c4.uuid) == 36, c4.uuid)
            self.assertTrue(c4.alt_id == 'c3', c4.alt_id)
            self.assertTrue(c4.author == 'Jed', c4.author)
            self.assertTrue(c4.body == 'And thanks\n', c4.body)
        def testRootCommentsAddOnly(self):
            bugB = self.bugdir.bug_from_uuid('b')
            initial_bugB_summary = bugB.summary
            self._execute(self.root_comment_xml,
                          {'root':'/b', 'add-only':True}, ['-'])
            uuids = list(self.bugdir.uuids())
            self.assertTrue(uuids == ['b'], uuids)
            bugB = self.bugdir.bug_from_uuid('b')
            self.assertTrue(bugB.uuid == 'b', bugB.uuid)
            self.assertTrue(bugB.creator == 'John', bugB.creator)
            self.assertTrue(bugB.status == 'open', bugB.status)
            self.assertTrue(bugB.summary == initial_bugB_summary, bugB.summary)
            estrs = ["don't forget your towel",
                     'helps with space travel']
            self.assertTrue(bugB.extra_strings == estrs, bugB.extra_strings)
            comments = list(bugB.comments())
            self.assertTrue(len(comments) == 3,
                            ['%s (%s)' % (c.uuid, c.alt_id) for c in comments])
            c1 = bugB.comment_from_uuid('c1')
            comments.remove(c1)
            self.assertTrue(c1.uuid == 'c1', c1.uuid)
            self.assertTrue(c1.alt_id is None, c1.alt_id)
            self.assertTrue(c1.author == 'Jane', c1.author)
            self.assertTrue(c1.body == 'Hello\n', c1.body)
            c2 = bugB.comment_from_uuid('c2')
            comments.remove(c2)
            self.assertTrue(c2.uuid == 'c2', c2.uuid)
            self.assertTrue(c2.alt_id is None, c2.alt_id)
            self.assertTrue(c2.author == 'Jess', c2.author)
            self.assertTrue(c2.body == 'World\n', c2.body)
            c4 = comments[0]
            self.assertTrue(len(c4.uuid) == 36, c4.uuid)
            self.assertTrue(c4.alt_id == 'c3', c4.alt_id)
            self.assertTrue(c4.author == 'Jed', c4.author)
            self.assertTrue(c4.body == 'And thanks\n', c4.body)

    unitsuite =unittest.TestLoader().loadTestsFromModule(sys.modules[__name__])
    suite = unittest.TestSuite([unitsuite, doctest.DocTestSuite()])