#NEWLINE# def test_failed_authentication( self ) : #NEWLINE# #INDENT# 'No matches found for the provider/id pair.' #NEWLINE# provider = self . access . provider #NEWLINE# identifier = self . access . identifier #NEWLINE# self . access . delete ( ) #NEWLINE# user = authenticate ( provider = provider , identifier = identifier ) #NEWLINE# self . assertEqual ( identifier , None , 'No user should be returned.' )