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module Arel
module Testing
class Engine < Arel::Memory::Engine
attr_reader :rows
def initialize
@rows = []
end
def supports(operation)
false
end
def read(relation)
case relation
when Arel::Take, Arel::Order, Arel::Skip, Arel::Where
relation.eval
else
@rows.dup.map { |r| Row.new(relation, r) }
end
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
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