https://github.com/regedarek/soup-client/blob/tests/spec/soup_spec.rb

agent.rb

require 'faraday'
require 'forwardable'

module Soup
  class Agent
    extend Forwardable

    def initialize(domain = 'https://www.soup.io/')
      @agent ||= faraday(domain)
    end

    def_delegators :@agent, :get, :post, :response_headers, :body, :status

    def faraday(domain)
      Faraday.new(url: domain) do |builder|
        builder.use Faraday::Request::UrlEncoded 
        builder.use Faraday::Response::Logger    
        builder.use Faraday::Adapter::NetHttp 
      end
    end
  end
end

soup_spec.rb

require File.expand_path(File.dirname(__FILE__) + '/spec_helper')

describe "Soup Agent" do
  before do
    @agent = Soup::Agent.new
  end
  it "should connect to soup.io" do
    @host.should == "www.soup.io"
  end
end

spec_helper.rb

$LOAD_PATH.unshift(File.join(File.dirname(__FILE__), '..', 'lib'))
$LOAD_PATH.unshift(File.dirname(__FILE__))
require 'rspec'
require 'soup-client'

# Requires supporting files with custom matchers and macros, etc,
# in ./support/ and its subdirectories.
Dir["#{File.dirname(__FILE__)}/support/**/*.rb"].each {|f| require f}

RSpec.configure do |config|

end

The whole code is here: https://github.com/regedarek/soup-client/blob/tests/spec/soup_spec.rb