我正在按照教程学习 Ruby + Rails，但无法让 rspec 为我工作。
http://rubysource.com/rails-deep-dive-loccasions-home-page/
我正在执行“我们的第一个测试”，当我运行时rake spec出现以下错误：
harley-alexanders-macbook-pro:loccasions Harley$ rake spec
/Users/Harley/.rvm/rubies/ruby-1.9.3-p0/bin/ruby -S rspec ./spec/acceptance/home_page_spec.rb
/Users/Harley/.rvm/gems/ruby-1.9.3-p0@loccasions/gems/activesupport-3.2.1/lib/active_support/dependencies.rb:251:in `require': cannot load such file -- rspec/capybara (LoadError)
from /Users/Harley/.rvm/gems/ruby-1.9.3-p0@loccasions/gems/activesupport-3.2.1/lib/active_support/dependencies.rb:251:in `block in require'
from /Users/Harley/.rvm/gems/ruby-1.9.3-p0@loccasions/gems/activesupport-3.2.1/lib/active_support/dependencies.rb:236:in `load_dependency'
from /Users/Harley/.rvm/gems/ruby-1.9.3-p0@loccasions/gems/activesupport-3.2.1/lib/active_support/dependencies.rb:251:in `require'
from /Users/Harley/Sites/rails/loccasions/spec/spec_helper.rb:6:in `<top (required)>'
from /Users/Harley/Sites/rails/loccasions/spec/acceptance/home_page_spec.rb:1:in `require'
from /Users/Harley/Sites/rails/loccasions/spec/acceptance/home_page_spec.rb:1:in `<top (required)>'
from /Users/Harley/.rvm/gems/ruby-1.9.3-p0@loccasions/gems/rspec-core-2.9.0/lib/rspec/core/configuration.rb:746:in `load'
from /Users/Harley/.rvm/gems/ruby-1.9.3-p0@loccasions/gems/rspec-core-2.9.0/lib/rspec/core/configuration.rb:746:in `block in load_spec_files'
from /Users/Harley/.rvm/gems/ruby-1.9.3-p0@loccasions/gems/rspec-core-2.9.0/lib/rspec/core/configuration.rb:746:in `map'
from /Users/Harley/.rvm/gems/ruby-1.9.3-p0@loccasions/gems/rspec-core-2.9.0/lib/rspec/core/configuration.rb:746:in `load_spec_files'
from /Users/Harley/.rvm/gems/ruby-1.9.3-p0@loccasions/gems/rspec-core-2.9.0/lib/rspec/core/command_line.rb:22:in `run'
from /Users/Harley/.rvm/gems/ruby-1.9.3-p0@loccasions/gems/rspec-core-2.9.0/lib/rspec/core/runner.rb:69:in `run'
from /Users/Harley/.rvm/gems/ruby-1.9.3-p0@loccasions/gems/rspec-core-2.9.0/lib/rspec/core/runner.rb:10:in `block in autorun'
rake aborted!
/Users/Harley/.rvm/rubies/ruby-1.9.3-p0/bin/ruby -S rspec ./spec/acceptance/home_page_spec.rb failed
Tasks: TOP => spec
(See full trace by running task with --trace)
我多次发现问题是过时的 gem，但我已经更新了所有这些以及我的 Gemfile 以反映这一点。
我知道“功能”是一种用于匹配场景等的水豚方法。我将其包含require('rspec/capybara')在我的 spec/spec_helber.rb 文件中，并将其包含在我的 Gemfile 中。
我究竟做错了什么！？
干杯，
~哈雷