refs #3 masterからブランチ切り直し

app/.circleci/config.yml

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+version: 2 # use CircleCI 2.0
+jobs: # a collection of steps
+  build: # runs not using Workflows must have a `build` job as entry point
+    parallelism: 3 # run three instances of this job in parallel
+    docker: # run the steps with Docker
+      - image: circleci/2.6.4-stretch-node-browsers-legacy # ...with this image as the primary container; this is where all `steps` will run
+        environment: # environment variables for primary container
+          BUNDLE_JOBS: 3
+          BUNDLE_RETRY: 3
+          BUNDLE_PATH: vendor/bundle
+          PGHOST: 127.0.0.1
+          PGUSER: circleci-demo-ruby
+          RAILS_ENV: test
+      - image: circleci/mysql:latest # database image
+        environment: # environment variables for database
+          POSTGRES_USER: circleci-demo-ruby
+          POSTGRES_DB: rails_blog
+          POSTGRES_PASSWORD: ""
+    steps: # a collection of executable commands
+      - checkout # special step to check out source code to working directory
+
+      # Which version of bundler?
+      - run:
+          name: Which bundler?
+          command: bundle -v
+
+      # Restore bundle cache
+      # Read about caching dependencies: https://circleci.com/docs/2.0/caching/
+      - restore_cache:
+          keys:
+            - rails-demo-bundle-v2-{{ checksum "Gemfile.lock" }}
+            - rails-demo-bundle-v2-
+
+      - run: # Install Ruby dependencies
+          name: Bundle Install
+          command: bundle check --path vendor/bundle || bundle install --deployment
+
+      # Store bundle cache for Ruby dependencies
+      - save_cache:
+          key: rails-demo-bundle-v2-{{ checksum "Gemfile.lock" }}
+          paths:
+            - vendor/bundle
+
+      - run:
+          name: Wait for DB
+          command: dockerize -wait tcp://localhost:5432 -timeout 1m
+
+      - run:
+          name: Database setup
+          command: bin/rails db:create  || bin/rails db:migrate RAILS_ENV=deployment || bin/rails db:seed RAILS_ENV=deployment
+
+      - run:
+          name: Run rspec in parallel
+          command: bundle exec rspec
+
+      # Save test results for timing analysis
+      - store_test_results: # Upload test results for display in Test Summary: https://circleci.com/docs/2.0/collect-test-data/
+          path: test_results
+      # See https://circleci.com/docs/2.0/deployment-integrations/ for example deploy configs