When your helpers use each other, or your view tests use many, it gets frustrating to include them by hand…
This will load all helpers from app/helpers dir and include them!
Happy, stress-free testing!

def include_helpers
  Dir.glob("#{RAILS_ROOT}/app/helpers/*_helper.rb").each do |file|
    helper = File.basename(file).sub('.rb','').camelcase.constantize
    include helper
  end
end

Your Controller/View/Helper test would look like this:

describe MoviesHelper do
  include_helpers
  ...
end

Getting all other helpers(e.g. from helpers/admin is more complicated, but surely possible…)