Python unittest - opposite of assertRaises?

Question

I want to write a test to establish that an Exception is not raised in a given circumstance.

It\'s straightforward to test if an Exception is raise

Answer 1

def _assertNotRaises(self, exception, obj, attr):                                                                                                                              
     try:                                                                                                                                                                       
         result = getattr(obj, attr)                                                                                                                                            
         if hasattr(result, '__call__'):                                                                                                                                        
             result()                                                                                                                                                           
     except Exception as e:                                                                                                                                                     
         if isinstance(e, exception):                                                                                                                                           
            raise AssertionError('{}.{} raises {}.'.format(obj, attr, exception)) 

could be modified if you need to accept parameters.

call like

self._assertNotRaises(IndexError, array, 'sort')