ruby-on-rails – 最小的测试在Rails 4.2中使用自定义HTTP头失败

概述我无法使用minitest在我的Rails 4.2应用程序中成功测试自定义HTTP变量 – 出于某种原因,Rails似乎根本不识别它们. 我有以下测试： require "test_helper"describe ApplicationController do tests HomeController before do cookies[:locale] = "ru" 我无法使用minitest在我的Rails 4.2应用程序中成功测试自定义http变量 – 出于某种原因,Rails似乎根本不识别它们.

我有以下测试：

require "test_helper"describe ApplicationController do  tests HomeController  before do    cookies[:locale] = "ru"    request.headers["Accept-Language"] = "zh-cn,en-us"    request.headers["CloudFront-VIEwer-Country"] = "FR"    I18n.default_locale = :en  end  it "sets locale from URL params first" do    get :index,locale: "de"    I18n.locale.must_equal :de  end  it "sets locale from a cookie second" do    get :index    I18n.locale.must_equal :ru  end  it "sets locale from Accept-Language header third" do    cookies.delete :locale    get :index    I18n.locale.must_equal :"zh-CN"  end  it "sets locale from CloudFront-VIEwer-Country header last" do    cookies.delete :locale    request.headers["Accept-Language"] = nil    get :index    I18n.locale.must_equal :fr  endend

和相应的控制器：

class ApplicationController < ActionController::Base  # Prevent CSRF attacks by raising an exception.  # For APIs,you may want to use :null_session instead.  protect_from_forgery with: :exception  before_filter :set_locale  def default_url_options(options = {})    { locale: I18n.locale }.merge options  end  private  def set_locale    I18n.locale = params[:locale] ||                  cookies[:locale] ||                  extract_locale_from_accept_language_header ||                  set_locale_from_cloudfront_vIEwer_country ||                  I18n.default_locale    unless request.fullpath =~ /^\/(?:[a-z]{2,2})(?:[-|_](?:[A-Z]{2,2}))?/      redirect_to %(#{request.protocol}#{request.host}/#{I18n.locale}#{request.fullpath unless request.fullpath == "/"}),status: :found    end  end  def extract_locale_from_accept_language_header    if request.env["Accept-Language"]      request.env["Accept-Language"].scan(/(?:[a-z]{2,2}))?/i).first    end  end  def set_locale_from_cloudfront_vIEwer_country    case request.env["CloudFront-VIEwer-Country"]    when "FR"      return :fr    else      return I18n.default_locale    end  endend

最后两个测试失败,因为Rails似乎没有识别我设置的http头变量,一切都落到了默认的语言环境：

Failure:ApplicationController#test_0004_sets locale from CloudFront-VIEwer-Country header last [/Users/aporter/Developer/com/wavetronix/www/test/controllers/application_controller_test.rb:33]Minitest::Assertion: Expected: :fr  Actual: :enFailure:ApplicationController#test_0003_sets locale from Accept-Language header third [/Users/aporter/Developer/com/wavetronix/www/test/controllers/application_controller_test.rb:26]Minitest::Assertion: Expected: :"zh-CN"  Actual: :en

如果我将Accept-Language更改为http_ACCEPT_LANGUAGE,那么该测试将通过.

根据Rails documentation,我的测试应该有效.我用几种不同的方式搜索这个问题寻找答案然后空洞. Stack Overflow上有一些与此类似的问题,但这些问题的答案和建议都没有解决我的问题.

我错过了什么？

环境：

> Mac OS X 10.11.1
> Ruby 2.2.2
> Rails 4.2.4
> minitest 5.8.0

解决方法 Rails通过以下方式为自定义http标头设置request.env变量：

>将标题转换为全部大写
>用下划线替换破折号
>前缀“http_”

因此,您可以在测试中设置request.headers [“Accept-Language”],并使用控制器中的request.env [“http_ACCEPT_LANGUAGE”]访问该值.同样,您在测试中设置request.headers [“CloudFront-VIEwer-Country”],并使用控制器中的request.env [“http_CLOUDFRONT_VIEWER_COUNTRY”]访问该值.

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