#NEWLINE# def test_slicing_left( self ) : #NEWLINE# #INDENT# with patch . object ( self . test_feed , 'get_activity_slice' ) as get_activity_slice : #NEWLINE# #INDENT# get_activity_slice . test_feed [ 5 : ] #NEWLINE# get_activity_slice . assert_called_with ( 5 , None )