Factorygirl sample

model_name.rb

FactoryGirl.define do
  factory :model_name do
    name "Name"
    description "Description"
    registered_at Time.zone.now
  end
end

model_name_spec.rb

describe ModelName do
  describe "Test of name" do
    it "should have getter of name." do
      sut = FactoryGirl.create(:model_name, name: 'name for test')
      expect(sut.name).to eq 'name for test'
    end
  end

  describe "Test of registered_at" do
    describe '#new' do
      it "should be new within 7 days from registration." do
        sut = FactoryGirl.create(:model_name, registered_at: Time.zone.now - 6.day)
        expect(sut.new).to eq true
      end
    end
  end
end