RAILS和RSpec:应为<"similar_movies">，但使用<[]> ]呈现

Question

这是.spec文件：

describe MoviesController do
    describe 'similar_movies' do
        before :each do
            @fake_results = [double('movie1'), double('movie2')]
        end
        it 'should call the model method that searches similar movies' do
            expect(Movie).to receive(:similar_movies).with("1").
            and_return @fake_results
            get :similar_movies, :id => 1
        end
        it 'should select the similar_movies template for rendering' do
            Movie.stub(:similar_movies).and_return(@fake_results)
            expect(response).to render_template(:similar_movies)
            get :similar_movies, :id => 1
        end
        # it 'should make the similar_movies results avaliable to that template'do

        # end
    end

这是控制器操作：

 # METHOD TO FIND MOVIES WITH THE SAME DIRECTOR AS A GIVEN ONE
   def similar_movies
    @similar_movies_arr = Movie.similar_movies(params[:id])
    #render 'similar_movies'
   end

这是model方法：

    def self.similar_movies(id)
    movie = Movie.find(id)
    director = movie['director']
    @similar_movies_arr = []
    @similar_movies = Movie.where(["director = ?", "#{director}"])
    @similar_movies.each do |m|
      @similar_movies_arr << m
    end
    return @similar_movies_arr
  end

这就是模板：

    -@similar_movies_arr.each do |movie|
  %h1= movie.title

这很简单，这是我使用RSpec的第一步，但是失败了。请，有人能帮我理解这个错误吗？

MoviesController similar_movies should select the similar_movies template for rendering
 Failure/Error: expect(response).to render_template(:similar_movies)
   expecting <"similar_movies"> but rendering with <[]>