human
Solve the following python programming problem given the following code:
@ mock.patch ('swift.container.auditor.ContainerBroker', FakeContainerBroker) 
def test_run_once(self) : 
    conf = { 
        
} 
    test_auditor = auditor.ContainerAuditor (conf, logger = self.logger) 
    def fake_audit_location_generator(* args, **kwargs) : 
        files = os.listdir (self.testdir) 
        return [(os.path.join (self.testdir, f), '', '') for f in files] 
with mock.patch ('swift.container.auditor.audit_location_generator', <MASK>) : 
        test_auditor.run_once () 
self.assertEqual (test_auditor.container_failures, 2) 
    self.assertEqual (test_auditor.container_passes, 3) 
    
    Given the code above, what is a proper replacement for <MASK>? Choose among: self, conf, test_auditor
assistant
#Here is a proper replacement for <MASK>.
def fake_audit_location_generator(