Introduce negative predicate

app/models/notification.rb

@@ -13,6 +13,10 @@ class Notification < ActiveRecord::Base
     save
   end
 
+  def unread?
+    !read?
+  end
+
   # Needed for EPP log
   def name
     "-"

test/integration/epp/poll_test.rb

@@ -82,7 +82,7 @@ class EppPollTest < ApplicationIntegrationTest
     response_xml = Nokogiri::XML(response.body)
     notification.reload
 
-    assert_not notification.read?
+    assert notification.unread?
     assert_equal 2303.to_s, response_xml.at_css('result')[:code]
   end
 

test/models/notification_test.rb

@@ -21,10 +21,10 @@ class NotificationTest < ActiveSupport::TestCase
 
   def test_unread_by_default
     notification = Notification.new(registrar: registrars(:bestnames), text: 'test')
-    assert_not notification.read?
+    assert notification.unread?
 
     notification.save!
-    assert_not notification.read?
+    assert notification.unread?
   end
 
   def test_honor_given_read_state