#NEWLINE# def test_d_selectable( self ) : #NEWLINE# #INDENT# a_mapper = inspect ( self . classes . A ) #NEWLINE# spec = [ self . classes . D ] #NEWLINE# eq_ ( a_mapper . _mappers_from_spec ( self , self . classes . B . __table__ . join ( self . classes . D . __table__ ) ) , [ inspect ( self . classes . D ) ] )