RSpec x Capybara x Webkit x X Server で JavaScript の絡むテストの自動化 ref: http://qiita.com/amoO_O/items/31d56493887fd0d1edac

.env

DISPLAY="localhost:1.0"

file1.txt

$ bundle install --path vendor/bundle --without=production --binstubs=bundle_bin

file10.txt

$ sudo apt-get install -y libqtwebkit-dev qt4-qmake

file12.txt

$ bundle install --path vendor/bundle --without=production --binstubs=bundle_bin

file13.txt

$ Xvfb :1 -screen 0 1024x768x16 -nolisten inet6

file14.txt

$ export DISPLAY=localhost:1.0
$ rspec

file2.txt

$ sudo apt-get install -y libqtwebkit-dev qt4-qmake

file3.txt

$ rspec

file4.txt

...
Capybara::Webkit::ConnectionError:
... capybara-webkit-1.7.1/bin/webkit_server failed to start.

file5.txt

$ vendor/bundle/ruby/2.2.0/gems/capybara-webkit-1.7.1/bin/webkit_server
webkit_server: cannot connect to X server

file6.txt

$ sudo apt-get install -y xvfb

file7.txt

$ Xvfb :1 -screen 0 1024x768x16 -nolisten inet6

file8.txt

$ export DISPLAY=localhost:1.0
$ rspec

file9.txt

$ sudo apt-get install -y xvfb

Gemfile

group :test do
  # ...
  gem "capybara-webkit"
  # ...
end

rails-helper.rb

config.before :suite do
  system "Xvfb :1 -screen 0 1024x768x16 -nolisten inet6 &"
end

config.after :suite do
  system "killall Xvfb"
end