gistfile1.builder

require 'spec_helper'

include ActiveMerchant::Billing

describe BillingTransaction do
  describe "remote requests" do
    before :each do
      @response = mock("response")
      @response.stub!(:success?).and_return true
      @response.stub!(:authorization).and_return "some reference"

      @gateway = mock("gateway")
      @billing_transaction = BillingTransaction.new
      @billing_transaction.gateway = @gateway
    end

    describe ".puchase" do
      before do
        @gateway.stub!(:purchase).and_return @response
      end

      it "should take processor response as message" do
        @response.stub!(:message).and_return "I'm a gateway response"

        @billing_transaction.purchase!(100, Factory.build(:credit_card))
        @billing_transaction.message.should == "I'm a gateway response"
      end
    end

    describe ".credit" do
      before do
        @gateway.stub!(:credit).and_return @response
      end

      it "should take processor response as message" do
        @response.stub!(:message).and_return "I'm a gateway response"

        @billing_transaction.credit!(100, Factory.build(:credit_card))
        @billing_transaction.message.should == "I'm a gateway response"
      end
    end
  end
end

I have a problem: "should take processor response as message" code examples are mostly duplicated. And I have a lot of such code examples. What are the ways to refactor it?