Introduce Contact#deletable?

app/models/contact.rb

@@ -552,4 +552,8 @@ class Contact < ActiveRecord::Base
   def registrant?
     registrant_domains.any?
   end
+
+  def deletable?
+    !linked?
+  end
 end

test/fixtures/contacts.yml

@@ -78,14 +78,6 @@ identical_to_william:
   auth_info: 5ab865
   uuid: c0a191d5-3793-4f0b-8f85-491612d0293e
 
-not_in_use:
-  name: Useless
-  email: useless@inbox.test
-  registrar: bestnames
-  code: not-in-use
-  auth_info: e75a2a
-  uuid: ca613cc5-a8dc-48c1-8d32-d3c6a0b6c952
-
 invalid:
   name: any
   code: invalid

test/integration/epp/contact/delete/base_test.rb

@@ -1,15 +1,11 @@
 require 'test_helper'
 
 class EppContactDeleteBaseTest < ActionDispatch::IntegrationTest
-  def setup
-    @contact = contacts(:john)
-  end
-
-  def test_deletes_a_contact_that_is_not_in_use
-    @contact = contacts(:not_in_use)
+  def test_deletes_contact
+    contact = deletable_contact
 
     # https://github.com/internetee/registry/issues/415
-    @contact.update_columns(code: @contact.code.upcase)
+    contact.update_columns(code: contact.code.upcase)
 
     request_xml = <<-XML
       <?xml version="1.0" encoding="UTF-8" standalone="no"?>
@@ -17,7 +13,7 @@ class EppContactDeleteBaseTest < ActionDispatch::IntegrationTest
         <command>
           <delete>
             <contact:delete xmlns:contact="https://epp.tld.ee/schema/contact-ee-1.1.xsd">
-              <contact:id>not-in-use</contact:id>
+              <contact:id>#{contact.code}</contact:id>
             </contact:delete>
           </delete>
         </command>
@@ -32,11 +28,12 @@ class EppContactDeleteBaseTest < ActionDispatch::IntegrationTest
     assert_equal 1, response_xml.css('result').size
   end
 
-  def test_contact_that_is_in_use_cannot_be_deleted
-    assert_equal 'john-001', @contact.code
+  def test_undeletable_cannot_be_deleted
+    contact = contacts(:john)
+    assert_not contact.deletable?
 
     # https://github.com/internetee/registry/issues/415
-    @contact.update_columns(code: @contact.code.upcase)
+    contact.update_columns(code: contact.code.upcase)
 
     request_xml = <<-XML
       <?xml version="1.0" encoding="UTF-8" standalone="no"?>
@@ -44,7 +41,7 @@ class EppContactDeleteBaseTest < ActionDispatch::IntegrationTest
         <command>
           <delete>
             <contact:delete xmlns:contact="https://epp.tld.ee/schema/contact-ee-1.1.xsd">
-              <contact:id>john-001</contact:id>
+              <contact:id>#{contact.code}</contact:id>
             </contact:delete>
           </delete>
         </command>
@@ -57,4 +54,12 @@ class EppContactDeleteBaseTest < ActionDispatch::IntegrationTest
     response_xml = Nokogiri::XML(response.body)
     assert_equal '2305', response_xml.at_css('result')[:code]
   end
+
+  private
+
+  def deletable_contact
+    Domain.update_all(registrant_id: contacts(:william))
+    DomainContact.delete_all
+    contacts(:john)
+  end
 end

test/models/contact/contact_test.rb

@@ -44,6 +44,16 @@ class ContactTest < ActiveSupport::TestCase
     assert_not contact.managed_by?(user)
   end
 
+  def test_deletable_when_not_linked
+    contact = unlinked_contact
+    assert contact.deletable?
+  end
+
+  def test_undeletable_when_linked
+    assert @contact.linked?
+    assert_not @contact.deletable?
+  end
+
   private
 
   def unlinked_contact