Ruby Rbenv/捆绑包问题-机架中未找到宝石

我从RVM切换到rbenv，它是插件。我的Gemfile很好，但是当我执行

捆绑安装

，

rbenv重新安装

等操作并运行

机架

时，它找不到任何gem。见下文。有人有什么想法吗

Vanessas-MacBook-Pro:my-app vanessa$ rbenv versions
* 1.8.7-p352 (set by RBENV_VERSION environment variable)
  1.9.2-p290
  1.9.3-rc1
  rbx-1.2.4
Vanessas-MacBook-Pro:my-app vanessa$ rbenv version
1.8.7-p352 (set by RBENV_VERSION environment variable)
Vanessas-MacBook-Pro:my-app vanessa$ more Gemfile
source 'http://rubygems.org'
gem "sinatra"
gem "god"
gem "rack", '1.2.3'
gem "activemodel", "~>3.0"


group :test do
  gem "rake"
end
Vanessas-MacBook-Pro:my-app vanessa$ gem list

*** LOCAL GEMS ***

bundler (1.0.21)
rake (0.9.2.2)
redgreen (1.2.2)
rubygems-update (1.8.11)
Vanessas-MacBook-Pro:my-app vanessa$ rake test
/Users/vanessa/.rbenv/versions/1.8.7-p352/bin/ruby -I"lib:lib:test" -I"/Users/vanessa/.rbenv/versions/1.8.7-p352/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib" "/Users/vanessa/.rbenv/versions/1.8.7-p352/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/rake_test_loader.rb" "test/**/test_*.rb" 
/Users/vanessa/.rbenv/versions/1.8.7-p352/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require': no such file to load -- rack/test (LoadError)
    from /Users/vanessa/.rbenv/versions/1.8.7-p352/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
    ...
    ...
rake aborted!
Command failed with status (1): [/Users/vanessa/.rbenv/versions/1.8.7-p352/bin/...]

Tasks: TOP => test
(See full trace by running task with --trace)
Vanessas-MacBook-Pro:my-app vanessa$ 

使用bundle exec

bundle exec rake test

使用bundle exec

bundle exec rake test

---

尝试将“机架测试”添加到您的Gemfile。

尝试将“机架测试”添加到您的Gemfile。

如果删除Gemfile.lock并再次执行捆绑，rbenv rehash会发生什么？如果删除Gemfile.lock并再次执行捆绑，rbenv rehash会发生什么？