1 <h2>Программа урока</h2>

2 <ul><li>Webmock</li>

3 <li>Тестирование JSON</li>

4 </ul>Rails.application.routes.draw do namespace :api do namespace :v1 do get 'names/fetch', to: 'names#fetch', as: :fetch_name end end end # Простейший способ тестирования API class Api::V1::NamesControllerTest &lt; ActionDispatch::IntegrationTest test '#fetch' do get api_v1_fetch_name_url assert_response :success end end class Api::V1::NamesController &lt; Web::ApplicationController def fetch render json: { country: '', possibility: 0.1 } end end # Проверка содержимого ответа class Api::V1::NamesControllerTest &lt; ActionDispatch::IntegrationTest test '#fetch' do get api_v1_fetch_name_url json_response = JSON.parse(response.body) assert_response :success assert_equal 'RU', json_response['country'] assert_equal 0.1, json_response['possibility'] refute_nil json_response['country'] refute_nil json_response['possibility'] end end class Api::V1::NamesController &lt; Web::ApplicationController def fetch result = FetchNameInformationService.new.(name: params[:name]) end end # app/services/fetch_name_information_service.rb # Сервис возвращает информацию об имени и верояность его использования в странах # http://api.nationalize.io/?name=David class FetchNameInformationService FETCH_NAME_BASE_URL = 'http://api.nationalize.io' def call(name:) uri = URI("#{FETCH_NAME_BASE_URL}?name=#{name}") response = Net::HTTP.get(uri) JSON.parse(response) rescue StandardError { country: nil, possibility: nil } end end # test/services/fetch_name_information_service_test.rb require 'test_helper' require_relative 'app/services/fetch_name_information_service.rb' # При каждом запуске тестов выполняется реальный запрос к API class FetchNameInformationServiceTest &lt; ActiveSupport::TestCase test '#call' do result = FetchNameInformationService.new.(name: params[:name]) assert result['country'].is_a? Array end end<h3>Webmock</h3>

5 # ./Gemfile group :test do # https://github.com/bblimke/webmock gem "webmock" end # ./test/test_helper.rb require 'webmock/minitest' # test/services/fetch_name_information_service_test.rb require 'test_helper' require_relative 'app/services/fetch_name_information_service.rb' # app/services/fetch_name_information_service.rb # Сервис возвращает информацию об имени и верояность его использования в странах # http://api.nationalize.io/?name=David class FetchNameInformationService FETCH_NAME_BASE_URL = 'http://api.nationalize.io' def call(name:) uri = URI("#{FETCH_NAME_BASE_URL}?name=#{name}") response = Net::HTTP.get(uri) { country: response['country'][0]['country_id'], possibility: response['country'][0]['probability'] } rescue StandardError { country: '', possibility: '' } end end # При каждом запуске тестов выполняется реальный запрос к API class FetchNameInformationServiceTest &lt; ActiveSupport::TestCase test '#call' do name = 'John' stub_request(:get, "#{FetchNameInformationService::FETCH_NAME_BASE_URL}?name=#{name}") result = FetchNameInformationService.new.(name: name) assert result[:country].is_a? String assert result[:possibility].is_a? String end end class Api::V1::NamesControllerTest &lt; ActionDispatch::IntegrationTest test '#fetch' do name = 'David' stub_request(:get, "#{FetchNameInformationService::FETCH_NAME_BASE_URL}?name=#{name}") get api_v1_fetch_name_url(name: name) json_response = JSON.parse(response.body) assert_response :success assert json_response['country'].is_a?(String) assert json_response['possibility'].is_a?(String) end end # Webmock может подменять ответы от внешних сервисов. stub_request(:get, "www.example.com"). to_return({body: "abc"}, {body: "def"}) Net::HTTP.get('www.example.com', '/') # ===&gt; "abc\n" Net::HTTP.get('www.example.com', '/') # ===&gt; "def\n"