build latest selenium-webdriver gem and use for marionette tests

.travis.yml

@@ -30,7 +30,10 @@ matrix:
     - gemfile: gemfiles/Gemfile.beta-versions
       rvm: 2.4.0-preview1
     - gemfile: gemfiles/Gemfile.beta-marionette
-      env: GECKODRIVER=true
+      env:
+        - GECKODRIVER=true
+          SELENIUM_BETA=true
+
       rvm: 2.3.1
       addons:
         firefox: latest-beta
@@ -62,6 +65,12 @@ before_install:
       GECKODRIVER_URL="https://github.com/mozilla/geckodriver/releases/download/v0.10.0/geckodriver-v0.10.0-linux64.tar.gz";
       FILE=`mktemp`; wget "$GECKODRIVER_URL" -qO $FILE && tar xz -C ~ -f $FILE geckodriver; rm $FILE; chmod 777 ~/geckodriver;
     fi
+  - if [ $SELENIUM_BETA ]; then
+      cd ..; git clone --depth 1 https://github.com/SeleniumHQ/selenium.git;
+      cd selenium; ./go //rb:gem:build;
+      cd ../capybara;
+      bundle config local.selenium-webdriver $HOME/selenium/build/rb;
+    fi
 before_script:
   - export DISPLAY=:99.0
   - sh -e /etc/init.d/xvfb start

gemfiles/Gemfile.beta-marionette

@@ -5,6 +5,8 @@ gemspec :path => '..'
 
 gem 'xpath', github: 'jnicklas/xpath'
 
-git 'https://github.com/SeleniumHQ/selenium.git' do
-  gem 'selenium-webdriver'
-end
+gem 'selenium-webdriver', :path => '../../selenium/build/rb'
+# git 'https://github.com/SeleniumHQ/selenium.git' do
+#   gem 'selenium-webdriver'
+# end
+# gem 'selenium-webdriver'

spec/selenium_spec.rb

@@ -62,12 +62,12 @@ RSpec.describe Capybara::Session do
 
       it "should have return code 1 when running selenium_driver_rspec_failure.rb" do
         `rspec spec/fixtures/selenium_driver_rspec_failure.rb`
-        expect($?.exitstatus).to be 1
+        expect($?.exitstatus).to eq(1)
       end
 
       it "should have return code 0 when running selenium_driver_rspec_success.rb" do
         `rspec spec/fixtures/selenium_driver_rspec_success.rb`
-        expect($?.exitstatus).to be 0
+        expect($?.exitstatus).to eq(0
       end
     end