evaluation.rb

    def evaluation_value(reputation_name, source, *args)
      scope = args.first
      srn = ReputationSystem::Network.get_scoped_reputation_name(self.class.name, reputation_name, scope)
      evaluation = RSEvaluation.find_by_reputation_name_and_source_and_target(srn, source, self)
      evaluation.present? ? evaluation.value : 0
    end

    def has_evaluation?(reputation_name, source, *args)
      scope = args.first
      srn = ReputationSystem::Network.get_scoped_reputation_name(self.class.name, reputation_name, scope)
      evaluation = RSEvaluation.find_by_reputation_name_and_source_and_target(srn, source, self)
      evaluation.present?
    end

evaluation_spec.rb

    describe "#evaluation_value" do
      it "should return evaluation value" do
        @question.add_evaluation(:total_votes, 1, @user)
        @question.evaluation_value(:total_votes, @user).should == 1
      end
    end

    describe "#has_evaluation?" do
      it "should return evaluation state" do
        @question.add_evaluation(:total_votes, 1, @user)
        @question.has_evaluation?(:total_votes, @user).should be_true
      end
    end