Fix post-receive specs

spec/workers/post_receive_spec.rb

 require 'spec_helper'
 
 describe PostReceive do
-
   context "as a resque worker" do
     it "reponds to #perform" do
       PostReceive.new.should respond_to(:perform)
@@ -15,7 +14,7 @@ describe PostReceive do
 
     it "fetches the correct project" do
       Project.should_receive(:find_with_namespace).with(project.path_with_namespace).and_return(project)
-      PostReceive.new.perform(pwd(project), 'sha-old', 'sha-new', 'refs/heads/master', key_id)
+      PostReceive.new.perform(pwd(project), key_id, changes)
     end
 
     it "does not run if the author is not in the project" do
@@ -23,7 +22,7 @@ describe PostReceive do
 
       project.should_not_receive(:execute_hooks)
 
-      PostReceive.new.perform(pwd(project), 'sha-old', 'sha-new', 'refs/heads/master', key_id).should be_false
+      PostReceive.new.perform(pwd(project), key_id, changes).should be_false
     end
 
     it "asks the project to trigger all hooks" do
@@ -32,11 +31,15 @@ describe PostReceive do
       project.should_receive(:execute_services)
       project.should_receive(:update_merge_requests)
 
-      PostReceive.new.perform(pwd(project), 'sha-old', 'sha-new', 'refs/heads/master', key_id)
+      PostReceive.new.perform(pwd(project), key_id, changes)
     end
   end
 
   def pwd(project)
     File.join(Gitlab.config.gitlab_shell.repos_path, project.path_with_namespace)
   end
+
+  def changes
+    'd14d6c0abdd253381df51a723d58691b2ee1ab08 570e7b2abdd848b95f2f578043fc23bd6f6fd24d refs/heads/master'
+  end
 end