path: root/spec/arel/engines/sql/unit/relations/order_spec.rb

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
          sql = Order.new(@relation, @attribute).to_sql

          adapter_is :mysql do
            sql.should be_like(%Q{
              SELECT `users`.`id`, `users`.`name`
              FROM `users`
              ORDER BY `users`.`id` ASC
            })
          end

          adapter_is_not :mysql do
            sql.should be_like(%Q{
              SELECT "users"."id", "users"."name"
              FROM "users"
              ORDER BY "users"."id" ASC
            })
          end
        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
          sql = Order.new(@relation, @attribute, @another_attribute).to_sql

          adapter_is :mysql do
            sql.should be_like(%Q{
              SELECT `users`.`id`, `users`.`name`
              FROM `users`
              ORDER BY `users`.`id` ASC, `users`.`name` ASC
            })
          end

          adapter_is_not :mysql do
            sql.should be_like(%Q{
              SELECT "users"."id", "users"."name"
              FROM "users"
              ORDER BY "users"."id" ASC, "users"."name" ASC
            })
          end
        end
      end

      describe "when given a string" do
        before do
          @string = "asdf"
        end

        it "passes the string through to the order clause" do
          sql = Order.new(@relation, @string).to_sql

          adapter_is :mysql do
            sql.should be_like(%Q{
              SELECT `users`.`id`, `users`.`name`
              FROM `users`
              ORDER BY asdf
            })
          end

          adapter_is_not :mysql do
            sql.should be_like(%Q{
              SELECT "users"."id", "users"."name"
              FROM "users"
              ORDER BY asdf
            })
          end
        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
          sql = Order.new(@ordered_relation, @another_attribute).to_sql

          adapter_is :mysql do
            sql.should be_like(%Q{
              SELECT `users`.`id`, `users`.`name`
              FROM `users`
              ORDER BY `users`.`name` ASC, `users`.`id` ASC
            })
          end

          adapter_is_not :mysql do
            sql.should be_like(%Q{
              SELECT "users"."id", "users"."name"
              FROM "users"
              ORDER BY "users"."name" ASC, "users"."id" ASC
            })
          end
        end
      end
    end
  end
end