added minimum length to abstract in event model

app/models/event.rb

@@ -31,6 +31,7 @@ class Event < ActiveRecord::Base
   validate :before_end_of_conference, on: :create
   validates :title, presence: true
   validates :abstract, presence: true
+  validates_length_of :abstract, minimum: 20
   validates :event_type, presence: true
   validates :program, presence: true
   validates :max_attendees, numericality: { only_integer: true, greater_than_or_equal_to: 1, allow_nil: true }

app/models/user.rb

@@ -182,7 +182,7 @@ class User < ActiveRecord::Base
   end
 
   def confirmed?
-    !confirmed_at.nil?
+    confirmed_at.present?
   end
 
   def proposals(conference)

spec/models/event_spec.rb

@@ -22,9 +22,11 @@ describe Event do
 
     it { is_expected.to validate_presence_of(:title) }
     it { is_expected.to validate_presence_of(:abstract) }
+    it { should validate_length_of(:abstract).is_at_least(20) }
     it { is_expected.to validate_presence_of(:program) }
     it { is_expected.to validate_presence_of(:event_type) }
 
+
     describe 'max_attendees_no_more_than_room_size' do
       before :each do
         unless (venue = event.program.conference.venue)