Add Selenium support file for specs and include headless for Vagrant

Signed-off-by: Sebastian Serth <Sebastian.Serth@student.hpi.de>

Gemfile

@@ -66,12 +66,13 @@ end
 group :test do
   gem 'autotest-rails'
   gem 'capybara'
+  gem 'capybara-selenium'
+  gem 'headless'
   gem 'codeclimate-test-reporter', require: false
   gem 'database_cleaner'
   gem 'nyan-cat-formatter'
   gem 'rake'
   gem 'rspec-autotest'
   gem 'rspec-rails'
-  gem 'selenium-webdriver'
   gem 'simplecov', require: false
 end

Gemfile.lock

@@ -91,6 +91,9 @@ GEM
       rack (>= 1.0.0)
       rack-test (>= 0.5.4)
       xpath (>= 2.0, < 4.0)
+    capybara-selenium (0.0.6)
+      capybara
+      selenium-webdriver
     carrierwave (1.2.2)
       activemodel (>= 4.0.0)
       activesupport (>= 4.0.0)
@@ -144,6 +147,7 @@ GEM
     forgery (0.7.0)
     globalid (0.4.1)
       activesupport (>= 4.2.0)
+    headless (2.3.1)
     highline (1.7.10)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
@@ -404,6 +408,7 @@ DEPENDENCIES
   capistrano-upload-config
   capistrano3-puma
   capybara
+  capybara-selenium
   carrierwave
   codeclimate-test-reporter
   coffee-rails
@@ -416,6 +421,7 @@ DEPENDENCIES
   factory_bot_rails
   faye-websocket
   forgery
+  headless
   highline
   ims-lti (= 1.1.10)
   jbuilder
@@ -444,7 +450,6 @@ DEPENDENCIES
   rubyzip
   sass-rails
   sdoc
-  selenium-webdriver
   simplecov
   slim
   sorcery

spec/support/selenium.rb

@@ -0,0 +1,21 @@
+require 'capybara/rspec'
+require 'selenium/webdriver'
+
+if ENV['HEADLESS_TEST'] == 'true' || ENV['USER'] == 'vagrant'
+  require 'headless'
+
+  headless = Headless.new
+  headless.start
+end
+
+Capybara.register_driver :selenium do |app|
+  profile = Selenium::WebDriver::Firefox::Profile.new
+  profile['intl.accept_languages'] = 'en'
+  capabilities = Selenium::WebDriver::Remote::Capabilities.firefox(elementScrollBehavior: 1)
+  options = Selenium::WebDriver::Firefox::Options.new
+  options.profile = profile
+  driver = Capybara::Selenium::Driver.new(app, browser: :firefox, desired_capabilities: capabilities, options: options)
+  driver.browser.manage.window.resize_to(1280, 960)
+  driver
+end
+Capybara.javascript_driver = :selenium