Use chrome on Travis rather than Firefox for most jobs

.travis.yml

@@ -11,22 +11,24 @@ php: [5.4, 5.5, 5.6, 7.0, 7.1, 7.2]
 env:
   global:
     - WEBDRIVER=selenium
+    - WEB_FIXTURES_BROWSER=chrome
 
 matrix:
   fast_finish: true
   include:
     - php: 7.0
-      env: WEBDRIVER=selenium-remote
+      env: WEBDRIVER=selenium-remote WEB_FIXTURES_BROWSER=firefox
       sudo: required
       services:
         - docker
     - php: 5.3
       dist: precise
       # Force using PHP 5.6 for the test server as PHP 5.3 does not have the builtin webserver
-      env: MINK_PHP_BIN=~/.phpenv/versions/5.6/bin/php
+      # Use Selenium 2 and Firefox when running on the precise infra, as it has a version of Firefox old enough.
+      env: MINK_PHP_BIN=~/.phpenv/versions/5.6/bin/php SELENIUM_VERSION=2 WEB_FIXTURES_BROWSER=firefox
 
 before_script:
-  - sh bin/run-"$WEBDRIVER".sh
+  - bash bin/run-"$WEBDRIVER".sh
 
   - composer install
 

bin/run-selenium.sh

@@ -1,11 +1,17 @@
-#!/usr/bin/env sh
+#!/usr/bin/env bash
 set -e
 
 echo '    Starting XVFB'
 sh -e /etc/init.d/xvfb start
 export DISPLAY=:99.0
 
 echo '    Downloading selenium'
-curl -L http://selenium-release.storage.googleapis.com/2.52/selenium-server-standalone-2.52.0.jar > selenium.jar
+if [ "${SELENIUM_VERSION:-3}" = "2" ]; then
+    curl -L http://selenium-release.storage.googleapis.com/2.53/selenium-server-standalone-2.53.0.jar > selenium.jar
+else
+    curl -L https://selenium-release.storage.googleapis.com/3.14/selenium-server-standalone-3.14.0.jar > selenium.jar
+fi;
+curl -L -O https://chromedriver.storage.googleapis.com/2.42/chromedriver_linux64.zip
+unzip chromedriver_linux64.zip
 echo '    Running selenium'
-java -jar selenium.jar -log /tmp/webdriver.log > /tmp/webdriver_output.txt 2>&1 &
+java -Dwebdriver.chrome.driver="$PWD/chromedriver" -jar selenium.jar -log /tmp/webdriver.log > /tmp/webdriver_output.txt 2>&1 &

tests/Selenium2Config.php

@@ -19,7 +19,14 @@ public function createDriver()
         $browser = getenv('WEB_FIXTURES_BROWSER') ?: 'firefox';
         $seleniumHost = $_SERVER['DRIVER_URL'];
 
-        return new Selenium2Driver($browser, null, $seleniumHost);
+        $capabilities = array();
+
+        // disable the Chrome sandbox when running on Travis as it is incompatible with their container environment
+        if ($browser === 'chrome' && 'true' === getenv('TRAVIS')) {
+            $capabilities['chrome']['args'] = array('--no-sandbox');
+        }
+
+        return new Selenium2Driver($browser, $capabilities, $seleniumHost);
     }
 
     /**