Receive "JSON::ParserError: 809: unexpected token at '<!DOCTYPE html>" when parsing response.body in specs

Question

所以，我在解决这个问题上浪费了太多时间。我想在我的 rspec 请求规范中解析 json 响应，为此我创建了：

# support/helper_methods.rb

module HelperMethods
  
  def json_response
    JSON.parse(response.body)
  end

end

# rails_helper.rb

RSpec.configure do |config|
  ...
  config.include HelperMethods
end

并想在简单的请求规范中使用它：

# requests/post_spec.rb

require 'rails_helper'

RSpec.describe 'Posts', type: :request do
  describe 'GET /posts' do
    let(:post) { create(:post) }

    before { post }

    it 'returns status 200' do
      get '/posts'

      expect(response.status).to eq(200)
    end

    it 'renders posts' do
      get '/posts'

      expect(json_response).to include('Some title')
    end
  end
end

但是，第二个示例失败并显示消息：

# bundle exec rspec result

Failures:

  1) Posts GET /posts renders posts
     Failure/Error: JSON.parse(response.body)
     
     JSON::ParserError:
       809: unexpected token at '<!DOCTYPE html>
       <html>
         <head>
           <title>Blog</title>
           <meta name="viewport" content="width=device-width,initial-scale=1">
           
           
     
           <link rel="stylesheet" media="all" href="/assets/application-04c3ae28f07e1bf734223bf526d0cdd296440ef53bcb3f80b9f093c6bf02f747.css" data-turbolinks-track="reload" />
           <script src="/packs-test/js/application-dd998cb6b794ecb7e8af.js" data-turbolinks-track="reload"></script>
         </head>
     
         <body>
           <p id="notice"></p>
     
       <h1>Posts</h1>
     
       <table>
         <thead>
           <tr>
             <th colspan="3"></th>
           </tr>
         </thead>
     
         <tbody>
     
             <tr>
               <td><a href="/posts/56">Some title</a></td>
               <td><a href="/posts/56/edit">Edit</a></td>
               <td><a data-confirm="Are you sure?" rel="nofollow" data-method="delete" href="/posts/56">Destroy</a></td>
             </tr>
         </tbody>
       </table>
     
       <br>
     
       <a href="/posts/new">New Post</a>
     
         </body>
       </html>
       '
     # ./spec/support/helper_methods.rb:8:in `json_response'
     # ./spec/requests/posts_spec.rb:21:in `block (3 levels) in <top (required)>'

Finished in 49.49 seconds (files took 0.46187 seconds to load)
2 examples, 1 failure

Failed examples:

rspec ./spec/requests/posts_spec.rb:17 # Posts GET /posts renders posts

我试图查看这是否是某种文档类型问题，但是跳过它会给出同样的错误，但这次带有 html 标记。我相信这是非常微不足道的事情，但我看不出有什么不对。

非常感谢您对此提供帮助。

Answer 1

好吧，原来是我这边的错误。正如评论中提到的 dbugger，您无法将 html 文件解析为 json.

Receive "JSON::ParserError: 809: unexpected token at '<!DOCTYPE html>" when parsing response.body in specs

Receive "JSON::ParserError: 809: unexpected token at '<!DOCTYPE html>" when parsing response.body in specs

json

ruby-on-rails

rspec