adding functionality to return job from a sorted set given a job id

lib/sidekiq/api.rb

@@ -279,6 +279,10 @@ module Sidekiq
       end
     end
 
+    def find_job(jid)
+      self.find{ |j| j.jid == jid }
+    end
+
     def delete(score, jid = nil)
       if jid
         elements = Sidekiq.redis do |conn|

test/test_api.rb

@@ -179,6 +179,13 @@ class TestApi < MiniTest::Unit::TestCase
       assert_equal 0, q.size
     end
 
+    it 'can find job by id' do
+      q      = Sidekiq::Queue.new
+      job_id = ApiWorker.perform_in(100, 1, 'jason')
+      job    = Sidekiq::ScheduledSet.new.find_job(job_id)
+      assert job
+    end
+
     it 'can clear a queue' do
       q = Sidekiq::Queue.new
       2.times { ApiWorker.perform_async(1, 'mike') }