test for dangerfile ruby

.travis.yml

@@ -45,6 +45,9 @@ matrix:
           components:
             - android-26
             - extra-android-m2repository
+
+      - env: FORMAT_CODE=true
+        language: ruby
 
 cache:
   directories:
@@ -96,6 +99,12 @@ install:
         cd ../../
     fi
 
+before_script:
+  - |
+    if [[ ("FORMAT_CODE" = "true" )]]; then
+        bundle exec danger
+    fi
+
 script:
   - |
     case $TEST_SUITE in

Dangerfile

@@ -0,0 +1,2 @@
+message("Hello, this worked")
+code_style_validation.check file_extensions: ['.cc', '.cpp', '.m', 'mm', '.h', '.java']

dangerfile.js

@@ -476,10 +476,6 @@ function findBlameReviewers(fileToDeletedLinesMap, fileToNormalLinesMap, fileToB
     message("According to the blame info, we recommended " + names.join(' , ') + " to be the reviewers.")
   }
 }
-
-// code format using danger-code_style_validation based on clang-format
-code_style_validation.check file_extensions: ['.hpp', '.cpp', '.m' , '.h', 'mm', '.cc', '.java']
-
 message('danger test finished.')
 /*
  * find reviewer end