Stub background job of updating search index in tests

spec/functional/command/repo/update_spec.rb

@@ -19,6 +19,7 @@ module Pod
         `git fetch -q`
         `git branch --set-upstream-to=origin/master master`
       end
+      SourcesManager.expects(:update_search_index_if_needed_in_background).with({}).returns(nil)
       lambda { command('repo', 'update').run }.should.not.raise
     end
 
@@ -27,6 +28,12 @@ module Pod
       repo2 = repo_clone('repo1', 'repo2')
       repo_make_readme_change(repo1, 'Updated')
       Dir.chdir(repo1) { `git commit -a -m "Update"` }
+      SourcesManager.expects(:update_search_index_if_needed_in_background).with() { |value|
+        value.each_pair { |source, paths|
+          source.name.should == 'repo2'
+          paths.should == ['README']
+        }
+      }
       run_command('repo', 'update', 'repo2')
       (repo2 + 'README').read.should.include 'Updated'
     end