run chrome test separately once

.travis.yml

@@ -16,6 +16,9 @@ matrix:
       rvm: 2.2
     - gemfile: gemfiles/Gemfile.beta-versions
       rvm: jruby-9.0.0.0.pre1
+    - gemfile: Gemfile
+      rvm: 2.2
+      env: CAPYBARA_CHROME=true
   allow_failures:
     - gemfile: gemfiles/Gemfile.beta-versions
       rvm: 2.2
@@ -26,13 +29,15 @@ env:
     - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
 
 before_install:
-  - CHROMEDRIVER_VERSION=$(wget -q -O - http://chromedriver.storage.googleapis.com/LATEST_RELEASE)
-  - CHROMEDRIVER_URL="http://chromedriver.storage.googleapis.com/$CHROMEDRIVER_VERSION/chromedriver_linux64.zip"
-  - FILE=`mktemp`; wget "$CHROMEDRIVER_URL" -qO $FILE && sudo unzip $FILE chromedriver -d /usr/local/bin; rm $FILE; sudo chmod 777 /usr/local/bin/chromedriver
-  - wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -
-  - sudo sh -c 'echo "deb http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list'
-  - sudo apt-get update
-  - sudo apt-get install google-chrome-stable --force-yes
+  - if [ $CAPYBARA_CHROME ]; then
+      CHROMEDRIVER_VERSION=$(wget -q -O - http://chromedriver.storage.googleapis.com/LATEST_RELEASE);
+      CHROMEDRIVER_URL="http://chromedriver.storage.googleapis.com/$CHROMEDRIVER_VERSION/chromedriver_linux64.zip";
+      FILE=`mktemp`; wget "$CHROMEDRIVER_URL" -qO $FILE && sudo unzip $FILE chromedriver -d /usr/local/bin; rm $FILE; sudo chmod 777 /usr/local/bin/chromedriver;
+      wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -;
+      sudo sh -c 'echo "deb http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list';
+      sudo apt-get update;
+      sudo apt-get install google-chrome-stable --force-yes;
+    fi
   - sudo chmod 1777 /dev/shm
   - sudo apt-get install awesome -y
 before_script:

Rakefile

@@ -15,6 +15,13 @@ RSpec::Core::RakeTask.new(:spec_with_chrome) do |t|
   t.pattern = './spec{,/*/**}/*{_spec.rb,_spec_chrome.rb}'
 end
 
+RSpec::Core::RakeTask.new(:spec_chrome) do |t|
+  t.rspec_opts = %w[--color]
+  # jruby buffers the progress formatter so travis doesn't see output often enough
+  t.rspec_opts << '--format documentation' if RUBY_PLATFORM=='java'
+  t.pattern = './spec/*{_spec_chrome.rb}'
+end
+
 YARD::Rake::YardocTask.new do |t|
   t.files   = ['lib/**/*.rb']
   t.options = %w(--markup=markdown)
@@ -24,6 +31,13 @@ Cucumber::Rake::Task.new(:cucumber) do |task|
   task.cucumber_opts = ['--format=progress', 'features']
 end
 
-task :travis => [:spec_with_chrome, :cucumber]
+task :travis do |t|
+  if ENV['CAPYBARA_CHROME']
+    Rake::Task[:spec_chrome].invoke
+  else
+    Rake::Task[:spec].invoke
+    Rake::Task[:cucumber].invoke
+  end
+end
 
 task :default => [:spec, :cucumber]

lib/capybara/selenium/driver.rb

@@ -237,7 +237,10 @@ class Capybara::Selenium::Driver < Capybara::Driver::Base
   end
 
   def invalid_element_errors
-    [Selenium::WebDriver::Error::StaleElementReferenceError, Selenium::WebDriver::Error::UnhandledError, Selenium::WebDriver::Error::ElementNotVisibleError]
+    [Selenium::WebDriver::Error::StaleElementReferenceError,
+     Selenium::WebDriver::Error::UnhandledError,
+     Selenium::WebDriver::Error::ElementNotVisibleError,
+     Selenium::WebDriver::Error::InvalidSelectorError]  # Work around a race condition that can occur with chromedriver and #go_back/#go_forward
   end
 
   def no_such_window_error

spec/selenium_spec_chrome.rb

@@ -1,17 +1,13 @@
 require 'spec_helper'
+require 'selenium-webdriver'
 
 Capybara.register_driver :selenium_chrome do |app|
   args = ENV['TRAVIS'] ? ['no-sandbox' ] : []
   Capybara::Selenium::Driver.new(app, :browser => :chrome, :args => args)
 end
 
-class ChromeTestApp < TestApp
-  # Object.id is different from the TestApp used in firefox session so 
-  # a new Capybara::Server instance will get launched for chrome testing
-end
-
 module TestSessions
-  Chrome = Capybara::Session.new(:selenium_chrome, ChromeTestApp)
+  Chrome = Capybara::Session.new(:selenium_chrome, TestApp)
 end
 
 Capybara::SpecHelper.run_specs TestSessions::Chrome, "selenium_chrome", :capybara_skip => [