Fix bug add files from directory iterator.

.travis.yml

@@ -7,13 +7,27 @@ php:
   - hhvm
   - nightly
 
+# cache vendor dirs
+cache:
+  directories:
+    - vendor
+    - $HOME/.composer/cache
+
 addons:
   code_climate:
     repo_token: 486a09d58d663450146c53c81c6c64938bcf3bb0b7c8ddebdc125fe97c18213a
 
+install:
+  - travis_retry composer self-update && composer --version
+  - travis_retry composer install --prefer-dist --no-interaction
+
 before_script:
   - sudo apt-get install p7zip-full
-  - composer install
 
 script:
-  vendor/bin/phpunit -v -c bootstrap.xml
+  - composer validate --no-check-lock
+  - vendor/bin/phpunit -v -c bootstrap.xml --coverage-clover build/logs/clover.xml
+
+after_success:
+  - vendor/bin/test-reporter
+