Switching Data Sources: Service Unit Test

receipt_data_source_spec.rb

require 'rails_helper'

RSpec.describe Services::ReceiptDataSource do
  describe "get_receipts" do
    it "makes appropriate call to canonical data service" do
      @subject_under_test = Services::ReceiptDataSource.new

      @subject_under_test.get_receipts

      expect(WebMock).to have_requested(:get, "#{ENV['RECEIPT_ENDPOINT']}/receipts.json")
    end
    
    ...
    
  end
end