module Arel module Testing class Engine attr_reader :rows def initialize @rows = [] end def supports(operation) false end def read(relation) @rows.dup.map { |r| Row.new(relation, r) } end def create(insert) @rows << insert.record.tuple insert end end end class Model include Relation attr_reader :engine def self.build relation = new yield relation relation end def initialize @attributes = [] end def engine(engine = nil) @engine = engine if engine @engine end def attribute(name, type) @attributes << type.new(self, name) end def attributes Header.new(@attributes) end def format(attribute, value) value end def insert(row) insert = super Arel::Row.new(self, row) insert.record end end end