Add test for parsing errors

import unittest

from nbxmpp.protocol import Iq

from nbxmpp.util import error_factory

class TestErrorParsing(unittest.TestCase):

    def test_error_parsing(self):

        stanza = '''

        <iq from='upload.montague.tld'

            id='step_03'

            to='romeo@montague.tld/garden'

            type='error'>

          <error type='modify'>

            <not-acceptable xmlns='urn:ietf:params:xml:ns:xmpp-stanzas' />

            <text xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'>File too large. The maximum file size is 20000 bytes</text>

            <text xml:lang='de' xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'>File zu groß. Erlaubt sind 20000 bytes</text>

            <file-too-large xmlns='urn:xmpp:http:upload:0'>

              <max-file-size>20000</max-file-size>

            </file-too-large>

          </error>

        </iq>'''

        error = error_factory(Iq(node=stanza))

        self.assertEqual(error.condition, 'not-acceptable')

        self.assertEqual(error.app_condition, 'file-too-large')

        self.assertEqual(error.get_text(), 'File too large. The maximum file size is 20000 bytes')

        self.assertEqual(error.get_text('de'), 'File zu groß. Erlaubt sind 20000 bytes')

        self.assertEqual(error.type, 'modify')

        self.assertEqual(error.id, 'step_03')

        self.assertEqual(error.jid, 'upload.montague.tld')