Authorize controller actions with cancan in rails

i have some actions in controller and put authorize for 3 actions,

class TestController
 def test1
   authorize! :view, :testcase1
   #do things1
 end

 def test2
   authorize! :view, :testcase2
   #do things2
 end

 def test3
   authorize! :view, :testcase3
   #do things3
 end
end

and in the corresponding action's view, i am checking like this

if can? :view, :test_case1
   #do things
end

So the problem is i am calling the authorize in 3 functions, can i put it like a single, same as before_filter