Using default parameter while writing test cases.

user.rb

class User
  field :first_name, type: String
  field :company_name, type: String
  field :role, type: String
  
  def name
    role == 'admin' ? first_name : [company_name, first_name].join(':')
  end
end

user_spec.rb

require 'spec_helper'

describe User do
  
  # here an argument is passed (default argument), using which we 
  # manipulate our condition hence we don't need to add 2 different test case for similar scenarios
  shared_examples "check user's name" do |role|
    it "should return users full name" do
      name = role == 'admin' ? @user.first_name : [@user.company_name, @user.first_name].join(':')
      @user.name.should == name
    end
  end
  
  contect "should check user object" do
    before(:each) do
      @admin_user = Factory(:admin_user)
      @user = Factory(:user)
    end
    
    # here we call same shared example in 2 different scenario using default argument
    include_examples "check user's name", @admin_user.role
    include_examples "check user's name", @user.role
  end
end