测试评论控制器 . Rspec的

我想测试注释控制器，动作创建，但我不知道怎么做 . comments_controller

class CommentsController < ApplicationController
  def create
    @hotel = Hotel.find(params[:hotel_id])
    @comment = @hotel.comments.new(comment_params)
    @comment.user_id = current_user.id
    @comment.save
    redirect_to @hotel
end

private
  def comment_params
    params.require(:comment).permit(:user_id, :body, :hotel_id)
  end
end

routes.rb

resources :hotels do
    resources :comments
    get 'list', on: :collection
    post 'comment'
  end

comments_controller_spec.rb

require 'rails_helper'

describe CommentsController do
  login_user
  describe 'POST create' do

    it 'create a new comment with valid attributes' do
      expect{
        comment_attr = attributes_for(:comment)
        post :create, comment: comment_attr
      }.to change(Comment,:count).by(1)
    end

    it 'redirects to the new comment' do
      comment_attr = attributes_for(:comment)
      post :create, comment: comment_attr
      expect(response).to redirect_to hotels_path(hotel)
    end

  end

end

factories.rb

FactoryGirl.define do
  factory :user do |user|
    user.email { Faker::Internet.email }
    user.password 'password'
    user.password_confirmation 'password'
  end

  factory :hotel do |hotel|
    hotel.title 'Hotel'
    hotel.description 'This is a some description for hotel'
    hotel.breakfast true
    hotel.price 20500
    hotel.address { create(:address) }
    hotel.user { create(:user) }
    hotel.avatar { fixture_file_upload(Rails.root + 'spec/fixtures/images/example.jpg', "image/jpg") }
  end

  factory :comment do |comment|
    comment.body 'This is a some comment ^_^'
    comment.user { create(:user) }
    comment.hotel { create(:hotel) }
  end

  factory :address do |address|
    address.country { Faker::Address.country }
    address.state { Faker::Address.state }
    address.city { Faker::Address.city }
    address.street { Faker::Address.street_name }
  end
end

但我有这个错误：

1）CommentsController POST create使用有效属性创建一个新注释失败/错误：post：create，comment：comment_attr ActionController :: UrlGenerationError：没有路由匹配{：comment => {：body =>“这是一些注释^ _ ^“，：user =>”5“，：hotel =>”1“} ,: controller =>”comments“，：action =>”create“}＃ . / spec / control / comment_controller_spec.rb：10：in阻止（4级）在<top（必要）>'＃ . / spec / control /comments_controller_spec.rb：8：inblock（3级）中'2）CommentsController POST创建重定向到新注释失败/错误：post：create ，comment：comment_attr ActionController :: UrlGenerationError：没有路由匹配{：comment => {：body =>“这是一些注释^ _ ^”，：user =>“5”，：hotel =>“1”}， ：controller =>“comments”，：action =>“create”}＃ . / spec / control /comments_controller_spec.rb：16：在`block（3 levels）in'