human
Solve the following python programming problem given the following code:
@ mock.patch ('oauth2client.util.logger') 
def test_enforcement_warning(self, mock_logger) : 
    util.positional_parameters_enforcement = util.POSITIONAL_WARNING 
    @ util.positional (1) 
    def fn(pos, kwonly = None) : 
        return True 
self.assertTrue (fn (1, 2)) 
    self.assertTrue (self.warning.called) 

    
    

    Fix the buggy line: self.assertTrue (self.warning.called)
assistant
#Here is Python code to fix the buggy line: self.

self.assertTrue (mock_logger.warning.called)