Rails3、Cucumber、Capybara、File Upload=>Bad Content Body(Eofiror)?

我很难找到一个简单的文件上传测试。我在Ruby1.9.2上使用了Rails3.0.0,其中包含黄瓜和水飞蓟。

观点:

<%= form_tag "/upload/create", :multipart => true do %>
  <label for="file">File to Upload:</label>
  <%= file_field_tag "file" %>
  <%= submit_tag "Upload" %>
<% end %>

黄瓜步骤:

When /^I upload the basic file$/ do  
  visit path_to("upload")
  path = File.join(::Rails.root, "somefile") 
  attach_file("file", path)
  click_button("Upload")
end

在我的控制器中,我已经注释掉了除以下内容以外的所有内容:

def create
  file = params[:file]
end

GemFile代码段:

group :development, :test do
  # testing with specs
  gem "ZenTest", ">= 4.3.3"
  gem "autotest"
  gem "rspec-rails", ">= 2.0.0.beta.19", :git => "git://github.com/rspec/rspec-rails.git"
  gem "rspec", :git => "git://github.com/rspec/rspec.git"
  gem "rspec-core", :git => "git://github.com/rspec/rspec-core.git"
  gem "rspec-expectations", :git => "git://github.com/rspec/rspec-expectations.git"
  gem "rspec-mocks", :git => "git://github.com/rspec/rspec-mocks.git"
  # cucumber stuff
  gem 'capybara'
  gem 'database_cleaner'
  gem 'cucumber-rails'
  gem 'cucumber'
  gem 'spork'
  gem 'launchy'    # So you can do Then show me the page
  gem 'escape_utils' # needed to fix Cucumber - http://crimpycode.brennonbortz.com/?p=42
end

当我尝试运行测试时,我收到:

(::) failed steps (::)
bad content body (EOFError)
<internal:prelude>:10:in `synchronize'

我很感激你的帮助和洞察力。谢谢。