added endpoint for get cancelled invoices

app/controllers/api/v1/accreditation_center/invoice_status_controller.rb

@@ -0,0 +1,32 @@
+module Api
+  module V1
+    module AccreditationCenter
+      class InvoiceStatusController < ::Api::V1::AccreditationCenter::BaseController
+        def index
+          username, password = Base64.urlsafe_decode64(basic_token).split(':')
+          @current_user ||= ApiUser.find_by(username: username, plain_text_password: password)
+
+          return render json: { errors: 'No user found' }, status: :not_found if @current_user.nil?
+
+          @invoices = @current_user.registrar.invoices.select { |i| i.cancelled_at != nil }
+
+          if @invoices
+            render json: { code: 1000, invoices: @invoices },
+                   status: :found
+          else
+            render json: { errors: 'No invoices' }, status: :not_found
+          end
+        end
+
+        private
+
+        def basic_token
+          pattern = /^Basic /
+          header  = request.headers['Authorization']
+          header = header.gsub(pattern, '') if header&.match(pattern)
+          header.strip
+        end
+      end
+    end
+  end
+end

config/routes.rb

@@ -127,6 +127,9 @@ Rails.application.routes.draw do
       end
 
       namespace :accreditation_center do
+        # At the moment invoice_status endpoint returns only cancelled invoices. But in future logic of this enpoint can change.
+        # And it will need to return invoices of different statuses. I decided to leave the name of the endpoint "invoice_status"
+        resources :invoice_status, only: [ :index ]
         resource :domains, only: [ :show ], param: :name
         resource :contacts, only: [ :show ], param: :id
         # resource :auth, only: [ :index ]

test/integration/api/accreditation_center/domains_test.rb

@@ -2,16 +2,14 @@ require 'test_helper'
 
 class DomainsTest < ApplicationIntegrationTest
   def setup
-    super
-
 		@domain = domains(:shop)
   end
 
 	def test_get_domain_info
-		get "/api/v1/accreditation_center/domains/?name=#{@domain.name}"
+		get "/api/v1/accreditation_center/domains/?name=shop.test"
 		json = JSON.parse(response.body, symbolize_names: true)
 
-		assert_equal json[:domain][:name], @domain.name
+		assert_equal json[:domain][:name], "shop.test"
 	end
 
 	def test_return_code_error_if_valid_domain_name

test/integration/api/accreditation_center/invoice_status_test.rb

@@ -0,0 +1,33 @@
+require 'test_helper'
+
+class DomainsTest < ApplicationIntegrationTest
+  def setup
+    super
+
+		@user = users(:api_bestnames)
+		@header = { 'Authorization' => "Basic #{generate_base64}" }
+  end
+
+	def test_should_return_cancelled_invoices
+		date_now = Time.now
+
+		get "/api/v1/accreditation_center/invoice_status", headers: @header
+		json = JSON.parse(response.body, symbolize_names: true)
+
+		assert_equal json[:invoices].count, 0
+
+		invoice = @user.registrar.invoices.last
+		invoice.update(cancelled_at: date_now)
+
+		get "/api/v1/accreditation_center/invoice_status", headers: @header
+		json = JSON.parse(response.body, symbolize_names: true)
+
+		assert_equal json[:invoices].count, 1
+	end
+
+	private
+
+	def generate_base64
+    Base64.encode64("#{@user.username}:#{@user.plain_text_password}")
+  end
+end