capybara have_title NoMethodError

Question

目前，這是一個簡單的項目 - 只是幾個靜態頁面。我正在開發一個通用的測試框架，但我正努力區分不同的測試選項。我已經添加了Rspec，水豚，Faker，工廠女孩，春季和應該（儘管我目前沒有使用應用程序匹配器）。

我有這個控制器測試文件：

require 'rails_helper' 

RSpec.describe StaticPagesController, type: :controller do 

    describe "GET #a_page" do 
    before(:each) { get :a_page } 

    it "returns http success" do 
     expect(response).to have_http_status(:success) 
    end 
    it "has a page title Static Site" do 
     expect(response).to have_title('Static Site') 
    end 
    end 

end 

當這個貫穿後衛，它拋出一個錯誤堆棧：

23:13:39 - INFO - Run all 
23:13:39 - INFO - Running all specs 
Running via Spring preloader in process 4498 
Running via Spring preloader in process 4506 
/home/steve/workspaces/static_site/db/schema.rb doesn't exist yet. Run `rake db:migrate` to create it, then try again. If you do not intend to use a database, you should instead alter /home/steve/workspaces/static_site/config/application.rb to limit the frameworks that will be loaded. 
.F 

Failures: 

    1) StaticPagesController GET #a_page has a page title Static Site 
    Failure/Error: expect(response).to have_title('Static Site') 

    NoMethodError: 
     undefined method `match' for nil:NilClass 
     Did you mean? catch 
    # /home/steve/.rvm/gems/ruby-2.3.1/gems/capybara-2.7.1/lib/capybara/queries/title_query.rb:18:in `resolves_for?' 
    # /home/steve/.rvm/gems/ruby-2.3.1/gems/capybara-2.7.1/lib/capybara/node/document_matchers.rb:20:in `block in assert_title' 
    # /home/steve/.rvm/gems/ruby-2.3.1/gems/capybara-2.7.1/lib/capybara/node/simple.rb:144:in `synchronize' 
    # /home/steve/.rvm/gems/ruby-2.3.1/gems/capybara-2.7.1/lib/capybara/node/document_matchers.rb:19:in `assert_title' 
    # /home/steve/.rvm/gems/ruby-2.3.1/gems/capybara-2.7.1/lib/capybara/rspec/matchers.rb:105:in `matches?' 
    # ./spec/controllers/static_pages_controller_spec.rb:34:in `block (3 levels) in <top (required)>' 
    # /home/steve/.rvm/gems/ruby-2.3.1/gems/spring-commands-rspec-1.0.4/lib/spring/commands/rspec.rb:18:in `call' 
    # /home/steve/.rvm/gems/ruby-2.3.1/gems/spring-1.7.1/lib/spring/command_wrapper.rb:38:in `call' 
    # /home/steve/.rvm/gems/ruby-2.3.1/gems/spring-1.7.1/lib/spring/application.rb:191:in `block in serve' 
    # /home/steve/.rvm/gems/ruby-2.3.1/gems/spring-1.7.1/lib/spring/application.rb:161:in `fork' 
    # /home/steve/.rvm/gems/ruby-2.3.1/gems/spring-1.7.1/lib/spring/application.rb:161:in `serve' 
    # /home/steve/.rvm/gems/ruby-2.3.1/gems/spring-1.7.1/lib/spring/application.rb:131:in `block in run' 
    # /home/steve/.rvm/gems/ruby-2.3.1/gems/spring-1.7.1/lib/spring/application.rb:125:in `loop' 
    # /home/steve/.rvm/gems/ruby-2.3.1/gems/spring-1.7.1/lib/spring/application.rb:125:in `run' 
    # /home/steve/.rvm/gems/ruby-2.3.1/gems/spring-1.7.1/lib/spring/application/boot.rb:19:in `<top (required)>' 
    # -e:1:in `<main>' 

Finished in 0.029 seconds (files took 2.54 seconds to load) 
2 examples, 1 failure 

Failed examples: 

rspec ./spec/controllers/static_pages_controller_spec.rb:33 # StaticPagesController GET #a_page has a page title Static Site 

的第一個測試運行正常，並沒有第二個，我得到一個乾淨的結果。我花了很多時間去檢查我的配置，它看起來不錯。我還查看了文檔和一些支持網站。

任何人都可以幫忙嗎？

Answer 1

水豚匹配器需要針對html/xml文檔元素（或解析爲文檔的字符串）而不是針對響應對象進行調用。默認情況下，Capybaras匹配器通常只在特性和視圖規格（不是控制器）中可用，您是否有將其納入控制器規格的特殊原因？驗證頁面標題真的應該更傾向於作爲視圖規範而不是控制器（默認情況下，視圖不在控制器規範中呈現 - https://www.relishapp.com/rspec/rspec-rails/docs/controller-specs）。