added integration tests to travis config

Author: 0x46616c6b

.travis.yml

@@ -1,8 +1,18 @@
+sudo: required
+
 language: php
 php:
   - 5.6
   - 7.0
   - 7.1
 
-before_script: composer install
-script: vendor/bin/phpunit
+services:
+  - docker
+
+before_script:
+  - docker pull systemli/etherpad-lite:1.6.1
+  - docker run -d -p 127.0.0.1:9001:9001 systemli/etherpad-lite:1.6.1
+  - composer install
+script:
+  - vendor/bin/phpunit
+  - vendor/bin/behat -f progress