在 Rails RSpec Mailer 测试中访问 URL 助手

Question

我是 Rspec、Capybara 和 Rails 的新手。我正在尝试使用 Rails 3.1 运行基本的邮件测试。我基本上遵循 Railscast #275，其中 Ryan 引用了一个 url 助手，就像我在这里做的那样，除了他，它可以工作。

spec/mailer/user_mailer_spec.rb 看起来像：

describe UserMailer do
  it 'should have access to URL helpers' do
    lambda { password_resets_path }.should_not raise_error
  end
end

但它似乎不喜欢我使用的 URL 助手。给定的错误是：

Timothys-MacBook-Pro:onelist-rails-3.1 tim$ rspec spec
F....

Failures:

  1) UserMailer should have access to URL helpers
     Failure/Error: lambda { password_resets_path }.should_not raise_error
       expected no Exception, got #<NameError: undefined local variable or method `password_resets_path' for #<RSpec::Core::ExampleGroup::Nested_1:0x007fa004697390>>
     # ./spec/mailer/user_mailer_spec.rb:19:in `block (2 levels) in <top (required)>'

Finished in 1.31 seconds
5 examples, 1 failure

Failed examples:

rspec ./spec/mailer/user_mailer_spec.rb:18 # UserMailer should have access to URL helpers

相关路线如下所示：

Timothys-MacBook-Pro:onelist-rails-3.1 tim$ rake routes | grep password
    password_resets GET    /password_resets(.:format)                {:action=>"index", :controller=>"password_resets"}
                    POST   /password_resets(.:format)                {:action=>"create", :controller=>"password_resets"}
 new_password_reset GET    /password_resets/new(.:format)            {:action=>"new", :controller=>"password_resets"}
edit_password_reset GET    /password_resets/:id/edit(.:format)       {:action=>"edit", :controller=>"password_resets"}
     password_reset GET    /password_resets/:id(.:format)            {:action=>"show", :controller=>"password_resets"}
                    PUT    /password_resets/:id(.:format)            {:action=>"update", :controller=>"password_resets"}
                    DELETE /password_resets/:id(.:format)            {:action=>"destroy", :controller=>"password_resets"}

如果有任何用处，我的spec/spec_helper.rb 看起来像这样：

# This file is copied to spec/ when you run 'rails generate rspec:install'           
ENV["RAILS_ENV"] ||= 'test'
require File.expand_path("../../config/environment", __FILE__)
require 'rspec/rails'
require 'capybara/rspec'

# Requires supporting ruby files with custom matchers and macros, etc,
# in spec/support/ and its subdirectories.
Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}

RSpec.configure do |config|
  # == Mock Framework
  #
  # If you prefer to use mocha, flexmock or RR, uncomment the appropriate line:
  #
  # config.mock_with :mocha
  # config.mock_with :flexmock
  # config.mock_with :rr
  config.mock_with :rspec

  # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
  # config.fixture_path = "#{::Rails.root}/spec/fixtures"

  # If you're not using ActiveRecord, or you'd prefer not to run each of your
  # examples within a transaction, remove the following line or assign false
  # instead of true.
  config.use_transactional_fixtures = true

  config.include(MailerMacros)
  config.before(:each) { reset_email }
end

我的config/environments/test.rb也有这条线

# Set URLs to work properly in email
config.action_mailer.default_url_options = { :host => "www.example.com" }

Answer 1

为了让 Rspec 自动加载 URL 帮助程序，您需要确保包含您的邮件程序的文件夹名为 mailers 而不是 mailer。