ruby-on-rails - 测试 Controller 方法。规范

Question

我想测试controller的方法，但是找不到用order和search来测试方法的例子。 这是我的 Controller :

class Admin::HotelsController < Admin::BaseController
  helper_method :sort_column, :sort_direction
  def index
    @hotels = Hotel.search(params[:search], params[:search_column]).order(sort_column + ' ' + sort_direction)
  end

  def show
    @hotel = Hotel.find(params[:id])

  end

  def update
    @hotel = Hotel.find(params[:id])
    if @hotel.update_attributes(hotel_params)
      redirect_to admin_hotels_path
    else
      render(:edit)
    end
  end

private
  def hotel_params
    params.require(:hotel).permit(:title, :description, :user_id, :avatar, :price, :breakfast, :status, address_attributes: [:state, :country, :city, :street])
  end

  def sort_column
    Hotel.column_names.include?(params[:sort]) ? params[:sort] : 'created_at'
  end

  def sort_direction
    %w[asc desc].include?(params[:direction]) ? params[:direction] : 'asc'
  end
end 

这是对该 Controller 的测试。

require 'rails_helper'

describe Admin::HotelsController do
    login_admin
    describe 'GET index' do
        it 'render a list of hotels' do
            hotel1, hotel2 = create(:hotel), create(:hotel)
            get :index
            expect(assigns(:hotels)).to match_array([hotel1, hotel2])
        end
    end

  describe 'GET show' do
    it 'should show hotel' do
      @hotel = create(:hotel)
      get :show, { id: @hotel.to_param, template: 'hotels/show' }
      expect(response).to render_template :show
    end
  end


end

我不知道如何测试索引方法。请帮助或给我一个有关此信息的链接。谢谢!

Answer 1

如果对您有帮助，出于各种原因，我个人更喜欢对 Controller 进行最少的测试:

1) 当我开始进行 Rails 测试时，我读了很多文章说这是个好主意2) 它允许您测试隔离模型方法:

describe 'GET index' do
  it 'render a list of hotels' do
    hotel1, hotel2 = create(:hotel), create(:hotel)
    get :index
    expect(assigns(:hotels)).to match_array([hotel1, hotel2])
  end
end 

此处您的测试与您对模型的查询结果相匹配。你可以这样拆分它:

describe 'GET index' do
  it 'render a list of hotels' do
    hotel1, hotel2 = create(:hotel), create(:hotel)
    Hotel.should_receive(:search).with(YOUR PARAMS)
    get :index
    response.response_code.should == 200
  end
end

然后在模型测试中测试Hotel.search的结果。

3) 它允许您测试功能，而不是一些不相关的随机事物:

describe 'GET show' do
  it 'should show hotel' do
    @hotel = create(:hotel)
    get :show, { id: @hotel.to_param, template: 'hotels/show' }
    expect(response).to render_template :show
  end
end

此处“expect(response).to render_template :show”似乎是在测试 Rails 渲染系统是否正常工作。我假设这不是你想要测试的，你可能更喜欢(这就是我会做的):

describe 'GET show' do
  it 'should show hotel' do
    @hotel = create(:hotel)
    Hotel.should_receive(:find).with(YOUR PARAMS)
    get :show, { id: @hotel.to_param, template: 'hotels/show' }
    response.response_code.should == 200
  end
end

然后使用类似 capybara gem 的功能测试来测试应该出现在网页上的内容，除非您正在渲染一些 json:在这种情况下匹配 Controller 中的 json 值。

顺便说一句:“@hotel = create(:hotel)” @ 在这里不是必需的，因为您在“它”中。此外，您可以像这样创建这样的条目:

context "" do
  before(:each) do
    @hotel = create(:hotel)   # here the @ is necessary for the variable to be        
    end                       # accessible in the it
  it "" do
  end
end

甚至像这样:

context "" do
  let(:hotel) { create(:hotel) } # you can call it in the test by using hotel and it
  it "" do                       # will be insert in you db only when it's in the "it"
  end                            # if you want it to be created in the "it" without
end                              # calling hotel for nothing, use let!