Merge pull request #1531 from thoughtbot/ap-fix-spec

Fix intermittently failing spec

paperclip.gemspec

@@ -47,4 +47,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency('railties')
   s.add_development_dependency('actionmailer', '>= 3.0.0')
   s.add_development_dependency('generator_spec')
+  s.add_development_dependency('timecop')
 end

spec/paperclip/storage/fog_spec.rb

 require 'spec_helper'
 require 'fog'
+require 'timecop'
 
 describe Paperclip::Storage::Fog do
   context "" do
@@ -319,11 +320,15 @@ describe Paperclip::Storage::Fog do
 
       context "generating an expiring url" do
         it "generates the same url when using Times and Integer offsets" do
-          rebuild_model(@options)
-          dummy = Dummy.new
-          dummy.avatar = StringIO.new('.')
-
-          assert_equal dummy.avatar.expiring_url(1234), dummy.avatar.expiring_url(Time.now + 1234)
+          Timecop.freeze do
+            offset = 1234
+            rebuild_model(@options)
+            dummy = Dummy.new
+            dummy.avatar = StringIO.new('.')
+
+            assert_equal dummy.avatar.expiring_url(offset),
+              dummy.avatar.expiring_url(Time.now + offset )
+          end
         end
 
         it 'matches the default url if there is no assignment' do