How to use the imapclient.exceptions.IMAPClientError function in IMAPClient

def test_list_sub_folders_NO(self):
        self.client._imap._simple_command.return_value = ('NO', [b'badness'])
        self.assertRaises(IMAPClientError, self.client.list_folders)

def test_list_folders_NO(self):
        self.client._imap._simple_command.return_value = ('NO', [b'badness'])
        self.assertRaises(IMAPClientError, self.client.list_folders)

def test_command_fails(self):
        self.client._imap._simple_command.return_value = "NO", [b'sorry']

        with self.assertRaises(IMAPClientError) as raised:
            self.client.starttls(sentinel.ssl_context)
        self.assertEqual(str(raised.exception), "starttls failed: sorry")

def _check_resp(self, expected, command, typ, data):
        """Check command responses for errors.

        Raises IMAPClient.Error if the command fails.
        """
        if typ != expected:
            raise exceptions.IMAPClientError("%s failed: %s" % (command, to_unicode(data[0])))

In this mode the server will return unsolicited responses
        about changes to the selected mailbox. This method returns
        immediately. Use ``idle_check()`` to look for IDLE responses
        and ``idle_done()`` to stop IDLE mode.

        .. note::

            Any other commands issued while the server is in IDLE
            mode will fail.

        See :rfc:`2177` for more information about the IDLE extension.
        """
        self._idle_tag = self._imap._command('IDLE')
        resp = self._imap._get_response()
        if resp is not None:
            raise exceptions.IMAPClientError('Unexpected IDLE response: %s' % resp)

that include timezone information (aware). By default
    *normalise_times* is True (times are normalised to the local
    system time). This attribute can be changed between ``fetch()``
    calls if required.

    Can be used as a context manager to automatically close opened connections:

    >>> with IMAPClient(host="imap.foo.org") as client:
    ...     client.login("bar@foo.org", "passwd")

    """

    # Those exceptions are kept for backward-compatibility, since
    # previous versions included these attributes as references to
    # imaplib original exceptions
    Error = exceptions.IMAPClientError
    AbortError = exceptions.IMAPClientAbortError
    ReadOnlyError = exceptions.IMAPClientReadOnlyError

    def __init__(self, host, port=None, use_uid=True, ssl=True, stream=False,
                 ssl_context=None, timeout=None):
        if stream:
            if port is not None:
                raise ValueError("can't set 'port' when 'stream' True")
            if ssl:
                raise ValueError("can't use 'ssl' when 'stream' is True")
        elif port is None:
            port = ssl and 993 or 143

        if ssl and port == 143:
            logger.warning("Attempting to establish an encrypted connection "
                           "to a port (143) often used for unencrypted "