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path: root/spec/arel/unit/relations/order_spec.rb
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require File.join(File.dirname(__FILE__), '..', '..', '..', 'spec_helper')

module Arel
  describe Order do
    before do
      @relation = Table.new(:users)
      @attribute = @relation[:id]
    end

    describe '#to_sql' do
      describe "when given an attribute" do
        it "manufactures sql with an order clause populated by the attribute" do
          Order.new(@relation, @attribute).to_sql.should be_like("
            SELECT `users`.`id`, `users`.`name`
            FROM `users`
            ORDER BY `users`.`id`
          ")
        end
      end
      
      describe "when given multiple attributes" do
        before do
          @another_attribute = @relation[:name]
        end
        
        it "manufactures sql with an order clause populated by comma-separated attributes" do
          Order.new(@relation, @attribute, @another_attribute).to_sql.should be_like("
            SELECT `users`.`id`, `users`.`name`
            FROM `users`
            ORDER BY `users`.`id`, `users`.`name`
          ")
        end
      end
      
      describe "when given a string" do
        before do
          @string = "asdf"
        end
        
        it "passes the string through to the order clause" do
          Order.new(@relation, @string).to_sql.should be_like("
            SELECT `users`.`id`, `users`.`name`
            FROM `users`
            ORDER BY asdf
          ")
        end
      end
      
      describe "when ordering an ordered relation" do
        before do
          @ordered_relation = Order.new(@relation, @attribute)
          @another_attribute = @relation[:name]
        end
        
        it "manufactures sql with the order clause of the last ordering preceding the first ordering" do
          Order.new(@ordered_relation, @another_attribute).to_sql.should be_like("
            SELECT `users`.`id`, `users`.`name`
            FROM `users`
            ORDER BY `users`.`name`, `users`.`id`
          ")
        end
      end
    end
  end
end