'Code coverage to ensure trace prints to string without error'

def test_trace_prints_okay(self):

    query = 'SELECT    *    FROM    system.local'
    statement = SimpleStatement(query)
    rs = self.session.execute(statement, trace=True)
    trace = rs.get_query_trace()
    self.assertTrue(trace.events)
    str(trace)
    for event in trace.events:
        str(event)
