Update CircleCI config

Author: marcoleong

.circleci/config.yml

@@ -1,59 +1,57 @@
 version: 2
 
 defaults: &defaults
-    working_directory: ~/repo
-    docker:
-        - image: circleci/node:9
+  working_directory: ~/repo
+  docker:
+    - image: circleci/node:9
 
 jobs:
-    checkout_code:
-        <<: *defaults
-        steps:
-            - checkout
-            - save_cache:
-                key: v1-repo-{{ .Environment.CIRCLE_SHA1 }}
-                paths:
-                    - ~/repo
+  checkout_code:
+    <<: *defaults
+    steps:
+      - checkout
+      - persist_to_workspace:
+          root: ~/repo
+          paths:
+            - '*'
 
-    yarn_deps:
-        <<: *defaults
-        steps:
-            - restore_cache:
-                name: Restore code cache
-                key: v1-repo-{{ .Environment.CIRCLE_SHA1 }}
-            - restore_cache:
-                name: Restore Yarn Package Cache
-                key: yarn-cache-{{ checksum "yarn.lock" }}
-            - run:
-                name: Install Dependencies
-                command: yarn install
-            - save_cache:
-                name: Save Yarn Package Cache
-                key: yarn-cache-{{ checksum "yarn.lock" }}
-                paths:
-                    - node_modules/
+  npm_deps:
+    <<: *defaults
+    steps:
+      - attach_workspace:
+          at: ~/repo
+      - restore_cache:
+          keys:
+            - node-v1-{{ .Branch }}-{{ checksum "package-lock.json" }}
+            - node-v1-{{ .Branch }}-
+            - node-v1-
+      - run: npm install
+      - save_cache:
+          key: node-v1-{{ .Branch }}-{{ checksum "package-lock.json" }}
+          paths:
+            - node_modules/
+      - persist_to_workspace:
+          root: ~/repo
+          paths:
+            - 'node_modules/'
 
-    test:
-        <<: *defaults
-        steps:
-            - restore_cache:
-                name: Restore code cache
-                key: v1-repo-{{ .Environment.CIRCLE_SHA1 }}
-            - restore_cache:
-                name: Restore Yarn Package Cache
-                key: yarn-cache-{{ checksum "yarn.lock" }}
-            - run:
-                name: Test
-                command: yarn test
+  test:
+    <<: *defaults
+    steps:
+      - attach_workspace:
+          at: ~/repo
+      - run:
+          name: Test
+          command: npm test
 
 workflows:
-    version: 2
-    test_only:
-        jobs:
+  version: 2
+  test_only:
+    jobs:
+      - checkout_code
+      - npm_deps:
+          requires:
             - checkout_code
-            - yarn_deps:
-                requires:
-                    - checkout_code
-            - test:
-                requires:
-                    - yarn_deps
+      - test:
+          requires:
+            - npm_deps