How to install Capybara-Webkit for Ubuntu 12.04

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Out Of Date Warning

This article was published on 24/07/2015, this means the content may be out of date or no longer relevant.
You should verify that the technical information in this article is still up to date before relying upon it for your own purposes.

Installing recent version of Capybara fail on Ubuntu 12.04, because the qt version is too old.


Running Capybara on Rails just fails with:

  /home/user/.rvm/gems/ruby-2.2.0/gems/capybara-webkit-1.6.0/bin/webkit_server failed to start.

(Re)-installing Capybara-Webkit might point out the problem:

gem install capybara-webkit

ERROR:  Error installing capybara-webkit:
        ERROR: Failed to build gem native extension.

/home/user/.rvm/rubies/ruby-2.2.0/bin/ruby extconf.rb
  cd src/ && ( test -e Makefile.webkit_server || /usr/lib/x86_64-linux-gnu/qt5/bin/qmake /home/user/.rvm/gems/ruby-2.2.0/gems/capybara-webkit-1.6.0/src/ -o Makefile.webkit_server ) && make -f Makefile.webkit_server
  Project ERROR: Unknown module(s) in QT: webkitwidgets
  make: *** [sub-src-webkit_server-pro-make_first-ordered] Error 3
  Command 'make' failed

# OR other missing packages
  Project ERROR: Unknown module(s) in QT: quick

Install Qt5 on Ubuntu 12.04

sudo apt-add-repository ppa:ubuntu-sdk-team/ppa
sudo apt-get update
sudo apt-get install qt5-default libqt5webkit5-dev qtdeclarative5-dev g++

Running without screen

If you are running the tests on a server without screen, webkit will still fail:


QXcbConnection: Could not connect to display
[2]    26798 abort (core dumped)

This happens, because Webkit needs a screen.

First, you install a virtual one (xvfb):

sudo apt-get install xvfb

Then use the Headless gem:

# Gemfile
group :test do
  gem 'headless'

and wrap your tests in a virtual framebuffer:

# e.g. rspec
  around(:each, js: true) do |example| do

(Alternatively, you can just use xvfb-run as written in capybara-webkit doc)