小编ste*_*ich的帖子

jQuery Grid插件插入以下HTML:

<td role="gridcell" style="" aria-describedby="list_createdBy">Sam</td>

'aria-describedby'属性是什么意思？

在我的Rails应用程序中,我已经将Ruby更新1.9.3为2.1.0.现在,当我重新开始测试时,我收到一个错误:

NameError: uninitialized constant MiniTest::Unit::TestCase::SUPPORTS_INFO_SIGNAL

以下是宝石Gemfile:

gem 'rails'
gem 'mysql2'
gem 'json'
gem 'jquery-rails'
gem 'kaminari'
gem 'therubyracer'
gem 'devise'
gem 'rak'
gem 'rails-translate-routes'
gem 'routes'

group :assets do
  gem 'sass-rails', " ~> 3.2.3"
  gem 'uglifier', ' >= 1.0.3'
end

group :development, :test do
  gem 'factory_girl_rails'
end

group :test do
  gem 'shoulda'
  gem 'database_cleaner'
  gem 'capybara'
end

这是堆栈跟踪:

`NameError: uninitialized constant MiniTest::Unit::TestCase::SUPPORTS_INFO_SIGNAL
~/.rvm/gems/ruby-2.1.0@kalender/gems/mocha-0.10.5/lib/mocha/integration/mini_test/version_230_to_262.rb:19:in `run'`
~/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/test/unit/testcase.rb:17:in `run'
~/.rvm/gems/ruby-2.1.0@kalender/gems/activesupport-3.2.12/lib/active_support/testing/setup_and_teardown.rb:36:in `block in run'
~/.rvm/gems/ruby-2.1.0@kalender/gems/activesupport-3.2.12/lib/active_support/callbacks.rb:425:in `_run__4401979439353622961__setup__4295356768171603498__callbacks'
~/.rvm/gems/ruby-2.1.0@kalender/gems/activesupport-3.2.12/lib/active_support/callbacks.rb:405:in `__run_callback' …