def test_unknown(self):
        xml = """
        <iq type='get' to='pubsub.example.org'
                       from='user@example.org'>
          <pubsub xmlns='http://jabber.org/protocol/pubsub#owner'>
            <affiliations node='test'/>
          </pubsub>
        </iq>
        """

        def cb(result):
            self.assertEquals('feature-not-implemented', result.condition)
            self.assertEquals('unsupported', result.appCondition.name)
            self.assertEquals(NS_PUBSUB_ERRORS, result.appCondition.uri)

        d = self.handleRequest(xml)
        self.assertFailure(d, error.StanzaError)
        d.addCallback(cb)
        return d
Regression test for https://github.com/astropy/astropy/issues/3422
dataset/ETHPy150Open ralphm/wokkel/wokkel/test/test_pubsub.py/PubSubServiceWithoutResourceTest.test_unknown--crossover with--dataset/ETHPy150Open spacetelescope/PyFITS/pyfits/tests/test_table.py/TestColumnFunctions.test_zero_precision_float_column