使用 Rspec 和 Rack::Test 测试 REST-API 响应

我有点难住了。我有以下集成测试：

require "spec_helper"

describe "/foods", :type => :api do
  include Rack::Test::Methods

  let(:current_user) { create_user! }
  let(:host) { "http://www.example.com" }

  before do
    login(current_user)
    @food = FactoryGirl.create_list(:food, 10, :user => current_user)
  end

  context "viewing all foods owned by user" do

    it "as JSON" do
      get "/foods", :format => :json

      foods_json = current_user.foods.to_json
      last_response.body.should eql(foods_json)
      last_response.status.should eql(200)

      foods = JSON.parse(response.body)

      foods.any? do |f|
        f["food"]["user_id"] == current_user.id
      end.should be_true

      foods.any? do |f|
        f["food"]["user_id"] != current_user.id
      end.should be_false
    end

  end

  context "creating a food item" do

    it "returns successful JSON" do
      food_item = FactoryGirl.create(:food, :user => current_user)

      post "/foods.json", :food => food_item

      food = current_user.foods.find_by_id(food_item["id"])
      route = "#{host}/foods/#{food.id}"

      last_response.status.should eql(201)
      last_response.headers["Location"].should eql(route)
      last_response.body.should eql(food.to_json)
    end

  end

end

我已经添加了所需的 Rack::Test::Methods 来获取last_response方法，但似乎效果不太好。last_response即使我已经登录，似乎总是显示登录页面。

如果我删除 Rack::Test::Methodslast_response消失了，我可以使用response相反，我得到了当前的响应。一切似乎都正常。

为什么是这样？哪儿是response方法从何而来？我可以用吗response从会话中获取先前的响应？

我需要使用last_response，或类似的东西，对于

last_response.headers["Location"].should eql(route)

这样我就可以匹配路线。如果不是因为这个，我就已经定了。

response对于某些规格类型是自动的。

Rspec 可能混合ActionController::TestCase::Behavior for :type => :api blocks.
response会来自ActionController::TestCase::Behavior，就像它的作用一样:type => :controller blocks.

如果您想在给出之前得到回复response，在发出下一个请求之前尝试将其存储在变量中。

https://www.relishapp.com/rspec/rspec-rails/v/2-3/docs/controller-specs https://www.relishapp.com/rspec/rspec-rails/v/2-3/docs/controller-specs and https://github.com/rspec/rspec-rails https://github.com/rspec/rspec-rails提供一些有关与某些不同规格类型混合的内容的信息。