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使用Rspec，如何在Rails 3.0.11中测试我的控制器的JSON格式？

[英]Using Rspec, how do I test the JSON format of my controller in Rails 3.0.11?

 原文  2012-03-06 01:42:45  6   2    ruby-on-rails/ json/ api/ header/ rspec

问题描述

I've scoured the web, but, alas, I just can't seem to get Rspec to correctly send content-type so I can test my JSON API. 我已经浏览了网页，但是，唉，我似乎无法让Rspec正确发送内容类型，所以我可以测试我的JSON API。 I'm using the RABL gem for templates, Rails 3.0.11, and Ruby 1.9.2-p180. 我正在使用RABL gem用于模板，Rails 3.0.11和Ruby 1.9.2-p180。

My curl output, which works fine (should be a 401, I know): 我的卷曲输出，工作正常（应该是401，我知道）： 

mrsnuggles:tmp gaahrdner$ curl -i -H "Accept: application/json" -X POST -d @bleh http://localhost:3000/applications
HTTP/1.1 403 Forbidden 
Content-Type: application/json; charset=utf-8
Cache-Control: no-cache
X-Ua-Compatible: IE=Edge
X-Runtime: 0.561638
Server: WEBrick/1.3.1 (Ruby/1.9.2/2011-02-18)
Date: Tue, 06 Mar 2012 01:10:51 GMT
Content-Length: 74
Connection: Keep-Alive
Set-Cookie: _session_id=8e8b73b5a6e5c95447aab13dafd59993; path=/; HttpOnly

{"status":"error","message":"You are not authorized to access this page."}

Sample from one of my test cases: 我的一个测试用例中的示例： 

describe ApplicationsController do
  render_views
  disconnect_sunspot

  let(:application) { Factory.create(:application) }

  subject { application }

  context "JSON" do

    describe "creating a new application" do

      context "when not authorized" do
        before do
          json = { :application => { :name => "foo", :description => "bar" } }
          request.env['CONTENT_TYPE'] = 'application/json'
          request.env['RAW_POST_DATA'] = json
          post :create
        end 

        it "should not allow creation of an application" do
          Application.count.should == 0
        end 

        it "should respond with a 403" do
          response.status.should eq(403)
        end 

        it "should have a status and message key in the hash" do
          JSON.parse(response.body)["status"] == "error"
          JSON.parse(response.body)["message"] =~ /authorized/
        end 
      end 

      context "authorized" do
      end 
    end
  end
end

These tests never pass though, I always get redirected and my content-type is always text/html , regardless of how I seem to specify the type in my before block: 这些测试从未通过，我总是被重定向，我的内容类型总是text/html ，无论我在前面的块中指定类型如何： 

# nope
before do
  post :create, {}, { :format => :json }
end

# nada
before do
  post :create, :format => Mime::JSON
end

# nuh uh
before do
  request.env['ACCEPT'] = 'application/json'
  post :create, { :foo => :bar }
end

Here is the rspec output: 这是rspec输出： 

Failures:

  1) ApplicationsController JSON creating a new application when not authorized should respond with a 403
     Failure/Error: response.status.should eq(403)

       expected 403
            got 302

       (compared using ==)
     # ./spec/controllers/applications_controller_spec.rb:31:in `block (5 levels) in <top (required)>'

  2) ApplicationsController JSON creating a new application when not authorized should have a status and message key in the hash
     Failure/Error: JSON.parse(response.body)["status"] == "errors"
     JSON::ParserError:
       756: unexpected token at '<html><body>You are being <a href="http://test.host/">redirected</a>.</body></html>'
     # ./spec/controllers/applications_controller_spec.rb:35:in `block (5 levels) in <top (required)>'

As you can see I'm getting the 302 redirect for the HTML format, even though I'm trying to specify 'application/json'. 正如您所看到的，我正在获取HTML格式的302重定向，即使我正在尝试指定'application / json'。

Here is my application_controller.rb , with the rescue_from bit: 这是我的application_controller.rb ，其中包含rescue_from位： 

class ApplicationController < ActionController::Base

 rescue_from ActiveRecord::RecordNotFound, :with => :not_found

  protect_from_forgery
  helper_method :current_user
  helper_method :remove_dns_record

 rescue_from CanCan::AccessDenied do |exception|
    flash[:alert] = exception.message
    respond_to do |format|
      h = { :status => "error", :message => exception.message }
      format.html { redirect_to root_url }
      format.json { render :json => h, :status => :forbidden }
      format.xml  { render :xml => h, :status => :forbidden }
    end 
  end

  private

  def not_found(exception)
    respond_to do |format|
      h = { :status => "error", :message => exception.message }
      format.html { render :file => "#{RAILS_ROOT}/public/404.html", :status => :not_found }
      format.json { render :json => h, :status => :not_found }
      format.xml  { render :xml => h, :status => :not_found }
    end
  end
end

And also applications_controller.rb , specifically the 'create' action which is what I'm trying to test. 还有applications_controller.rb ，特别是我正在尝试测试的'create'动作。 It's fairly ugly at the moment because I'm using state_machine and overriding the delete method. 它目前相当丑陋，因为我正在使用state_machine并覆盖delete方法。 

  def create
    # this needs to be cleaned up and use accepts_attributes_for
    @application = Application.new(params[:application])
    @environments = params[:application][:environment_ids]
    @application.environment_ids<<@environments unless @environments.blank?

    if params[:site_bindings] == "new"
      @site = Site.new(:name => params[:application][:name])
      @environments.each do |e|
        @site.siteenvs << Siteenv.new(:environment_id => e)
      end
    end

    if @site
      @application.sites << @site
    end

    if @application.save
      if @site
        @site.siteenvs.each do |se|
          appenv = @application.appenvs.select {|e| e.environment_id == se.environment_id }
          se.appenv = appenv.first
          se.save
        end
      end
      flash[:success] = "New application created."
      respond_with(@application, :location => @application)
    else
      render 'new'
    end

    # super stinky :(
    @application.change_servers_on_appenvs(params[:servers]) unless params[:servers].blank?
    @application.save
  end

I've looked at the source code here: https://github.com/rails/rails/blob/master/actionpack/lib/action_controller/metal/responder.rb , and it seems it should respond correctly, as well as a number of questions on stack overflow that seem to have similar issues and possible solutions, but none work for me. 我在这里查看了源代码： https ： //github.com/rails/rails/blob/master/actionpack/lib/action_controller/metal/responder.rb ，它似乎应该正确响应，以及堆栈溢出问题的数量似乎有类似的问题和可能的解决方案，但没有一个适合我。

What am I doing wrong? 我究竟做错了什么？

2 个解决方案

解决方案1
 65  2012-10-11 02:58:44

I realize that setting :format => :json is one solution (as noted above). 我意识到设置:format => :json是一种解决方案（如上所述）。 However, I wanted to test the same conditions that the clients to my API would use. 但是，我想测试客户端到API的相同条件。 My clients would not be setting the :format parameter, instead they would be setting the Accept HTTP header. 我的客户端不会设置:format参数，而是设置Accept HTTP标头。 If you are interested in this solution, here is what I used: 如果您对此解决方案感兴趣，请使用以下内容： 

# api/v1/test_controller_spec.rb
require 'spec_helper.rb'
describe Api::V1::TestController do
  render_views
  context "when request sets accept => application/json" do
    it "should return successful response" do
      request.accept = "application/json"
      get :test
      response.should be_success
    end
  end
end

解决方案2
 60 已采纳  2012-03-06 02:27:47

Try moving the :format key inside the params hash of the request, like this: 尝试在请求的params哈希中移动:format键，如下所示： 

describe ApplicationsController do
  render_views
  disconnect_sunspot

  let(:application) { Factory.create(:application) }

  subject { application }

  context "JSON" do

    describe "creating a new application" do

      context "when not authorized" do
        it "should not allow creation of an application" do
          params = { :format => 'json', :application => { :name => "foo", :description => "bar" } }
          post :create, params 
          Expect(Application.count).to eq(0)
          expect(response.status).to eq(403)
          expect(JSON.parse(response.body)["status"]).to eq("error")
          expect(JSON.parse(response.body)["message"]).to match(/authorized/)
        end 


      end 

      context "authorized" do
      end 
    end
  end
end

Let me know how it goes! 让我知道事情的后续！ thats the way I have set my tests, and they are working just fine! 这就是我设置测试的方式，他们工作得很好！

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