update CI config: create test result directory and export test options for reporting

Author: NguyenHoangSon96

.circleci/config.yml

@@ -63,10 +63,15 @@ commands:
           command: |
             cd << parameters.path >>
             bundle exec rake rubocop
+      - run:
+          name: Create test result directory
+          command: |
+            mkdir -p << parameters.path >>/test/reports
       - run:
           name: Run tests
           command: |
             cd << parameters.path >>
+            export TESTOPTS="--ci-dir=<< parameters.path >>/test/reports"
             bundle exec rake test
       - run:
           name: Collecting coverage reports