Add CircleCI config

.circleci/config.yml

@@ -0,0 +1,55 @@
+# Javascript Node CircleCI 2.0 configuration file
+#
+# Check https://circleci.com/docs/2.0/language-javascript/ for more details
+#
+
+defaults: &defaults
+  docker:
+    # Choose the version of Node you want here
+    - image: circleci/node:10.11
+  working_directory: ~/repo
+
+version: 2
+jobs:
+  setup:
+    <<: *defaults
+    steps:
+      - checkout
+      - restore_cache:
+          name: Restore node modules
+          keys:
+            - v1-dependencies-{{ checksum "package.json" }}
+            # fallback to using the latest cache if no exact match is found
+            - v1-dependencies-
+      - run:
+          name: Install dependencies
+          command: yarn install
+      - save_cache:
+          name: Save node modules
+          paths:
+            - node_modules
+          key: v1-dependencies-{{ checksum "package.json" }}
+
+
+  tests:
+    <<: *defaults
+    steps:
+      - checkout
+      - restore_cache:
+          name: Restore node modules
+          keys:
+            - v1-dependencies-{{ checksum "package.json" }}
+            # fallback to using the latest cache if no exact match is found
+            - v1-dependencies-
+      - run:
+          name: Run tests
+          command: yarn test
+
+workflows:
+  version: 2
+  test_and_release:
+    jobs:
+      - setup
+      - tests:
+          requires:
+            - setup