gistfile1.rb

 class Manuscript
  include Mongoid::Document

  embeds_many :authors
 
  field :code, type: String
  field :title, type: String
  field :status, type: String
  field :status_date, type: Date
end

class Author
  include Mongoid::Document

  embedded_in :manuscript

  field :publish_name, type: String

  def last_name
    publish_name.split(',').first
  end
end

#rspec tests
 
  describe 'manuscript status query' do
  	  before :each do
  	   	@manuscript = Manuscript.create!(valid_attributes)
  		  @manuscript.authors << Author.new(publish_name: 'Li,John') #would like to mock the Author model
  		  @exitent_author_params = "li"
  		  @nonexitent_author_params = "Witherspoon"
  	  end
  	  
  describe "#author_match?" do
        it "should be true with valid author" do
  	      expect(@manuscript.author_match?(@exitent_author_params)).to eq(true)
        end

        it "should ignore white space" do
          expect(@manuscript.author_match?(" Li")).to eq(true)
        end

         it "should be false with invalid author" do
  	      expect(@manuscript.author_match?(@nonexitent_author_params)).to eq(false)
        end
      end