spec/active_relation/unit/relations/selection_spec.rb


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require File.join(File.dirname(__FILE__), '..', '..', '..', 'spec_helper')

module ActiveRelation
  describe Selection do
    before do
      @relation = Table.new(:users)
      @predicate = @relation[:id].eq(1)
    end
  
    describe '#initialize' do
      before do
        @another_predicate = @relation[:name].lt(2)
      end
      
      it "manufactures nested selection relations if multiple predicates are provided" do
        Selection.new(@relation, @predicate, @another_predicate). \
          should == Selection.new(Selection.new(@relation, @another_predicate), @predicate)
      end
    end
    
    describe '#to_sql' do
      describe 'when given a predicate' do
        it "manufactures sql with where clause conditions" do
          Selection.new(@relation, @predicate).to_sql.should be_like("
            SELECT `users`.`id`, `users`.`name`
            FROM `users`
            WHERE `users`.`id` = 1
          ")
        end
      end
      
      describe 'when given a string' do
        it "passes the string through to the where clause" do
          Selection.new(@relation, 'asdf').to_sql.should be_like("
            SELECT `users`.`id`, `users`.`name`
            FROM `users`
            WHERE asdf
          ")
        end
      end
    end
  end
end