当我尝试打开rails控制台时出现以下错误：
$ rails console
/home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require': cannot load such file -- minitest/unit (LoadError)
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `block in require'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:236:in `load_dependency'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
from /usr/share/ruby/test/unit/assertions.rb:1:in `<top (required)>'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `block in require'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:236:in `load_dependency'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
from /usr/share/ruby/test/unit/testcase.rb:1:in `<top (required)>'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `block in require'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:236:in `load_dependency'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/test_case.rb:1:in `<top (required)>'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `block in require'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:236:in `load_dependency'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/console/app.rb:2:in `<top (required)>'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `block in require'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:236:in `load_dependency'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/application.rb:304:in `initialize_console'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/application.rb:152:in `load_console'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands/console.rb:27:in `start'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands/console.rb:8:in `start'
from /home/me/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands.rb:41:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
我使用Fedora 17.我已经通过yum安装了Ruby和gem，然后通过gem安装了rails。
更新： 我安装的宝石，也许我的gemset中有一些宝石丢失，或者我有错误的版本。
$ gem list
*** LOCAL GEMS ***
actionmailer (3.2.13)
actionpack (3.2.13)
activemodel (3.2.13)
activerecord (3.2.13)
activeresource (3.2.13)
activesupport (3.2.13)
arel (3.0.2)
builder (3.0.4)
bundler (1.3.4)
coffee-rails (3.2.2)
coffee-script (2.2.0)
coffee-script-source (1.6.2)
erubis (2.7.0)
execjs (1.4.0)
hike (1.2.1)
i18n (0.6.1)
journey (1.0.4)
jquery-rails (2.2.1)
json (1.7.7)
mail (2.5.3)
mime-types (1.22)
minitest (4.7.0)
multi_json (1.7.2)
polyglot (0.3.3)
rack (1.4.5)
rack-cache (1.2)
rack-ssl (1.3.3)
rack-test (0.6.2)
rails (3.2.13)
railties (3.2.13)
rake (10.0.4)
rdoc (3.12.2)
sass (3.2.7)
sass-rails (3.2.6)
sprockets (2.2.2)
thor (0.18.1)
tilt (1.3.6)
treetop (1.4.12)
tzinfo (0.3.37)
uglifier (1.3.0)
答案 0 :(得分：0)
尝试运行：
script/rails console
让我们知道会发生什么，否则你也可以尝试
bundle exec script/rails console
答案 1 :(得分：0)
在控制台中加载测试很奇怪...... minitest gem可能只包含在测试组中，并且在开发环境中不可用。将gem添加到开发组可能会起作用，但这是在治疗症状，而不是原因。
不知何故，也许在irbrc文件中，你包含了测试库。
答案 2 :(得分：0)
好的，我通过手动安装ruby 2.0.0并删除了我通过yum安装的ruby 1.9.3解决了这个问题。