Ruby on rails Rails 4、Rspec和Factory Girl:URI:：InvalidURIError（多租户）

我正在学习Rails 4和Multitenancy的教程，但在尝试测试用户是否可以作为所有者登录并重定向到创建的子域时，我遇到了一个错误

这是测试错误：

Failures:

  1) User sign in signs in as an account owner successfully
     Failure/Error: visit root_url

     URI::InvalidURIError:
       bad URI(is not URI?): http://#{account.subdomain}.example.com
     # /Users/developer/.rvm/gems/ruby-2.3.1/gems/capybara-2.10.1/lib/capybara/rack_test/browser.rb:71:in `reset_host!'
     # /Users/developer/.rvm/gems/ruby-2.3.1/gems/capybara-2.10.1/lib/capybara/rack_test/browser.rb:21:in `visit'
     # /Users/developer/.rvm/gems/ruby-2.3.1/gems/capybara-2.10.1/lib/capybara/rack_test/driver.rb:43:in `visit'
     # /Users/developer/.rvm/gems/ruby-2.3.1/gems/capybara-2.10.1/lib/capybara/session.rb:240:in `visit'
     # /Users/developer/.rvm/gems/ruby-2.3.1/gems/capybara-2.10.1/lib/capybara/dsl.rb:52:in `block (2 levels) in <module:DSL>'
     # ./spec/features/users/sign_in_spec.rb:9:in `block (3 levels) in <top (required)>'

Finished in 0.56981 seconds (files took 1.26 seconds to load)
11 examples, 1 failure, 6 pending

以下是工厂：

账户：

FactoryGirl.define do
  factory :account, :class => Subscribe::Account do
    sequence(:name) { |n| "Test Account ##{n}" }
    sequence(:subdomain) { |n| "test#{n}" }
    association :owner, :factory => :user
  end
end

用户：

FactoryGirl.define do
  factory :user, :class => Subscribe::User do
    sequence(:email) { |n| "test#{n}@example.com" }
    password "password"
    password_confirmation "password"
  end
end

我真的不熟悉BDD，如果您需要我发布更多信息，请告诉我。

所以我解决了这个问题：

问题出在我的SubdomainHelpers文件中

module SubdomainHelpers
  def within_account_subdomain
    ### This Line Is the original line
    let(:subdomain_url) { 'http://#{account.subdomain}.example.com' }

    ### Changed it to this
    let(:subdomain_url) { "http://#{account.subdomain}.example.com" }

    before { Capybara.default_host = subdomain_url }
    after { Capybara.default_host = 'http://www.example.com' }
    yield
  end
end

出于某种原因，使用单引号将

account.subdomain

保留为字符串；我一改双引号，测试就通过了

---

谢谢

之所以会出现这种情况，是因为单引号字符串没有对其执行插值，因此

#{}

是按字面意思执行的。通过使用双引号的strong，将进行插值，并且该代码将正常工作。

module SubdomainHelpers
  def within_account_subdomain
    ### This Line Is the original line
    let(:subdomain_url) { 'http://#{account.subdomain}.example.com' }

    ### Changed it to this
    let(:subdomain_url) { "http://#{account.subdomain}.example.com" }

    before { Capybara.default_host = subdomain_url }
    after { Capybara.default_host = 'http://www.example.com' }
    yield
  end
end