在Rails 3中使用Cucumber/Capybara，如何設置自定義的User-Agent字符串？

Question

在我的Rails 3應用程序中，我對iPhone和桌面瀏覽器有不同的佈局。我正在嘗試使用Cucumber/Capybara測試iPhone佈局。到目前爲止，我所有在請求的HTTP頭中設置iPhone用戶代理字符串的嘗試都失敗了。

我遵循Testing custom headers and ssl with Cucumber and Capybara教程，但它似乎沒有在HTTP請求中設置User-Agent字符串。

如果我只是使用我的iPhone瀏覽我的Rails應用程序，我會得到正確的佈局。我正在使用Rack-Mobile-Detect將Rails request.format設置爲：iphone。

關於如何使這項工作的任何想法？我準備把水豚甩開，然後回到Webrat。

這是我到目前爲止有：

Feature: Detect Browser 
    In order to have different layouts for iPhone vs. desktop browsers 
    As a developer 
    I want to show different layouts for different browsers 

Scenario: Show home page with desktop layout 
    Given I am using "a desktop browser" 
    When I go to "the home page" 
    Then I should see "desktop browser" 

Scenario: Show home page with iPhone layout 
    Given I am using "mobile safari" 
    When I go to "the home page" 
    Then show me the page 
    Then I should see "mobile safari" 

Detect_browser_steps.rb

Given /^(?:|I)am using (.+)$/ do |browser| 
    case browser 
    when "mobile safari" 
    agent = "Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_1_2 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7D11 Safari/528.16" 
    add_headers({'User-Agent' => agent}) 
    else 
    # don't set a special User-Agent header 
    end 
end 

headers_hack.rb

# http://aflatter.de/2010/06/testing-headers-and-ssl-with-cucumber-and-capybara/ 
# The following solution will work only if you use the :rack_test driver. 
module RackTestMixin 

    def self.included(mod) 
    mod.class_eval do 
     # This is where we save additional entries. 
     def hacked_env 
     @hacked_env ||= {} 
     end 

     # Alias the original method for further use. 
     alias_method :original_env, :env 

     # Override the method to merge additional headers. 
     # Plus this implicitly makes it public. 
     def env 
     original_env.merge(hacked_env) 
     end 
    end 
    end 

end 

Capybara::Driver::RackTest.send :include, RackTestMixin 

module HeadersHackHelper 

    def add_headers(headers) 
    page.driver.hacked_env.merge!(headers) 
    end 

end 

World(HeadersHackHelper) 

Answer 1

嘿。很高興你發現我的文章;-)

你檢查是否Rack::Test傳遞你的頭到控制器？ 您可以在控制器中嘗試類似Rails.logger.info("Headers: #{headers.inspect}")的內容，然後檢查您的日誌文件。

Answer 2

只好擺弄這個有點，但最終我設法得到它只是工作，加入：

# features/support/capybara_headers.rb: 

module CapybaraHeadersHelper 
    def add_headers(headers) 
    headers.each do |name, value| 
     page.driver.browser.header(name, value) 
    end 
    end 
end 
World(CapybaraHeadersHelper) 

你可以在這個blog post我寫更多的信息，但是這基本上它。