Exclude tests from CS build

Author: bcrowe

.travis.yml

@@ -3,7 +3,7 @@ language: php
 env:
   global:
     - PHPCS=0
-
+    - RUN_TESTS=1
 
 php:
   - 5.4
@@ -21,14 +21,14 @@ matrix:
     - php: 5.4
       env: 'COMPOSER_FLAGS="--prefer-stable --prefer-lowest"'
     - php: 5.6
-      env: PHPCS=1
+      env: PHPCS=1 RUN_TESTS=0
 
 before_script:
   - travis_retry composer self-update
   - travis_retry composer update ${COMPOSER_FLAGS} --no-interaction --prefer-source
 
 script:
-  - phpunit --coverage-text --coverage-clover=coverage.clover
+  - sh -c "if [ '$RUN_TESTS' = '1' ]; then phpunit --coverage-text --coverage-clover=coverage.clover; fi"
   - sh -c "if [ '$PHPCS' = '1' ]; then vendor/bin/phpcs -p -n --extensions=php --standard=psr2 ./src ./tests; fi"
 
 after_script: