Implements timecop to make tests independent from DateTime (close #327)

spec/factories/call_for_papers.rb

@@ -2,8 +2,8 @@
 
 FactoryGirl.define do
   factory :call_for_papers do
-    start_date Date.today - 1
-    end_date Date.today + 7
+    start_date { 1.day.ago }
+    end_date { 7.days.from_now }
     description 'We call for papers'
     conference
   end

spec/factories/conferences.rb

@@ -7,10 +7,10 @@ FactoryGirl.define do
     social_tag 'dps14'
     timezone 'Amsterdam'
     contact_email 'admin@example.com'
-    start_date Date.today
-    end_date Date.today + 6.days
-    registration_start_date Date.today + 3.days
-    registration_end_date Date.today + 5.days
+    start_date { Date.today }
+    end_date { 6.days.from_now }
+    registration_start_date { 3.days.from_now }
+    registration_end_date { 5.days.from_now }
     make_conference_public true
     venue
   end

spec/factories/photos.rb

@@ -5,7 +5,7 @@ FactoryGirl.define do
     picture_file_name 'rails.png'
     picture_content_type 'image/png'
     picture_file_size '1024'
-    picture_updated_at DateTime.now
+    picture_updated_at { DateTime.now }
     description 'Lorem Ipsum Dolor'
     conference
   end

spec/factories/social_events.rb

@@ -2,7 +2,7 @@ FactoryGirl.define do
   factory :social_event do
     title 'Example Social Event'
     description 'Lorem Ipsum Dolsum'
-    date Date.today
+    date { Date.today }
     conference
   end
 

spec/factories/targets.rb

@@ -2,7 +2,7 @@
 
 FactoryGirl.define do
   factory :target do
-    due_date Date.today + 14
+    due_date { 14.days.from_now }
     target_count 100
     unit Target.units[:submissions]
   end

spec/factories/users.rb

@@ -5,7 +5,7 @@ FactoryGirl.define do
     sequence(:name) { |n| "name#{n}" }
     password 'changeme'
     password_confirmation 'changeme'
-    confirmed_at Time.now
+    confirmed_at { Time.now }
     biography <<-EOS
       Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus enim
       nunc, venenatis non sapien convallis, dictum suscipit purus. Vestibulum

spec/factories/vdays.rb

@@ -1,6 +1,6 @@
 FactoryGirl.define do
   factory :vday do
-    day Date.today
+    day { Date.today }
     description 'Lorem Ipsum dolsum'
     conference
   end