committee.rb

class Commitee < OpenStruct
  attr_reader :service

  def self.service
    @service ||= SunlightService.new
  end

  def self.find_by(params)
    service.committees(params).map { |commitee| Commitee.new(commitee) }
  end
end

committee_test.rb

require './test/test_helper'

class CommiteeTest < ActiveSupport::TestCase
  test '#find_by' do
    VCR.use_cassette('commitee#find_by') do
      commitees = Commitee.find_by(chamber: 'senate')
      commitee  = commitees.first

      assert_equal 20,                                          commitees.count
      assert_equal Commitee,                                    commitee.class
      assert_equal 'Regulatory Affairs and Federal Management', commitee.name
    end
  end
end

legislator.rb

class Legislator < OpenStruct
  attr_reader :service

  def self.service
    @service ||= SunlightService.new
  end

  def self.find_by(params)
    service.legislators(params).map { |legislator| Legislator.new(legislator) }
  end
end

legislator_test.rb

require './test/test_helper'

class LegislatorTest < ActiveSupport::TestCase
  test '#find_by' do
    VCR.use_cassette('legislator#find_by') do
      legislators = Legislator.find_by(gender: 'F')
      legislator  = legislators.first

      assert_equal 20,         legislators.count
      assert_equal Legislator, legislator.class
      assert_equal 'Joni',     legislator.first_name
      assert_equal 'Ernst',    legislator.last_name
    end
  end
end

sunlight_service.rb

class SunlightService
  attr_reader :connection

  def initialize
    @connection               = Hurley::Client.new('http://congress.api.sunlightfoundation.com')
    connection.query[:apikey] = ENV['sunlight_api_key']
  end

  def legislators(params)
    parse(connection.get('legislators', params))[:results]
  end

  def committees(params)
    parse(connection.get('committees', params))[:results]
  end

  private

  def parse(response)
    JSON.parse(response.body, symbolize_names: true)
  end
end

sunlight_service_test.rb

require './test/test_helper'

class SunlightServiceTest < ActiveSupport::TestCase
  attr_reader :service

  def setup
    @service = SunlightService.new
  end

  test '#legislators' do
    VCR.use_cassette('schoolist_service#legislators') do
      legislators = service.legislators(gender: 'F')
      legislator  = legislators.first

      assert_equal 20, legislators.count
      assert_equal 'Joni',  legislator[:first_name]
      assert_equal 'Ernst', legislator[:last_name]
    end
  end

  test '#committees' do
    VCR.use_cassette('schoolist_service#commitees') do
      committees = service.committees(chamber: 'senate')
      committee  = committees.first

      assert_equal 20, committees.count
      assert_equal 'Regulatory Affairs and Federal Management', committee[:name]
    end
  end
end