Refactor

app/models/dns/domain_name.rb

@@ -7,17 +7,25 @@ module DNS
     end
 
     def unavailable?
-      blocked?
+      registered? || blocked?
     end
 
     def unavailability_reason
-      :blocked if blocked?
+      if registered?
+        :registered
+      elsif blocked?
+        :blocked
+      end
     end
 
     private
 
     attr_reader :name
 
+    def registered?
+      Domain.find_by_idn(name)
+    end
+
     def blocked?
       BlockedDomain.where(name: name).any?
     end

app/models/epp/domain.rb

@@ -810,11 +810,7 @@ class Epp::Domain < Domain
           next
         end
 
-        if Domain.find_by_idn domain_name_as_string
-          result << { name: domain_name_as_string, avail: 0, reason: 'in use' }
-        else
-          result << { name: domain_name_as_string, avail: 1 }
-        end
+        result << { name: domain_name_as_string, avail: 1 }
       end
 
       result

config/locales/en.yml

@@ -196,6 +196,7 @@ en:
   errors:
     messages:
       blank: 'is missing'
+      epp_domain_registered: in use
       epp_domain_blocked: Blocked
       epp_obj_does_not_exist: 'Object does not exist'
       epp_authorization_error: 'Authorization error'

test/models/dns/domain_name_test.rb

@@ -1,6 +1,14 @@
 require 'test_helper'
 
 class DNS::DomainNameTest < ActiveSupport::TestCase
+  def test_unavailable_when_registered
+    domain_name = DNS::DomainName.new('shop.test')
+    assert_equal 'shop.test', domains(:shop).name
+
+    assert domain_name.unavailable?
+    assert_equal :registered, domain_name.unavailability_reason
+  end
+
   def test_unavailable_when_blocked
     domain_name = DNS::DomainName.new('blocked.test')
     assert_equal 'blocked.test', blocked_domains(:one).name