def search_movies_director
  @current_movie = Movie.find(params[:id])
  begin
    @movies = Movie.find_movies_director(params[:id])
  rescue Movie::NoDirectorError
    flash[:warning] = "#{@current_movie} has no director info"
    redirect_to movies_path
  end
end

我无法弄清楚如何正确测试所述路径：无效搜索(收到错误后)应该重定向到主页.我试过这样的东西：

describe MoviesController do
  describe 'Finding Movies With Same Director' do
    #some other code

    context 'after invalid search' do
      it 'should redirect to the homepage' do
        Movie.stub(:find)
        Movie.stub(:find_movies_director).and_raise(Movie::NoDirectorError)
        get :search_movies_director,{:id => '1'}
        response.should redirect_to movies_path
      end
    end

  end
end

运行测试失败并出现错误：NameError：未初始化的常量Movie :: NoDirectorError

如何伪造这个测试中的错误,以便它实际检查重定向是否发生？

谢谢！

更新：

正如nzifnab所说,它找不到Movie :: NoDirectorError.我忘了定义这个异常类.所以我把它添加到app / models / movie.rb中：

class Movie < ActiveRecord::Base
  class Movie::NoDirectorError < StandardError ; end
  #some model methods
end

这解决了我的问题,这个测试通过了.