human
Solve the following python programming problem given the following code:
@ mock.patch ('nailgun.api.v1.handlers.logs.DumpTaskManager') 
def test_log_package_handler_with_dump_task_manager_error(self, dump_manager) : 
    '400 status when errors with uncompleted models in session occur' 
    def dump_task_with_bad_model(* args, **kwargs) : 
        raise errors.TaskAlreadyRunning () 
dump_manager ().execute.side_effect = <MASK> 
    resp = self.app.put (reverse ('LogPackageHandler'), '[]', headers = self.default_headers, expect_errors = True) 
    self.assertEqual (resp.status_code, 400) 
    
    Given the code above, what is a proper replacement for <MASK>? Choose among: self, resp, dump_manager
assistant
#Here is a proper replacement for <MASK>.
def dump_task_with_bad_model(