add circleci config.yml with Jest test summary setting

.circleci/config.yml

@@ -0,0 +1,45 @@
+version: 2
+jobs:
+   build:
+     docker:
+       - image: circleci/node:latest
+     working_directory: ~/react-cafe-cms
+     steps:
+       - checkout
+       - run:
+           name: Install pcakage
+           command: yarn install
+       - save_cache:
+           key: dependency-cache-{{ checksum "package.json" }}
+           paths:
+             - ~/react-cafe-cms
+
+   test:
+      docker:
+        - image: circleci/node:latest
+      working_directory: ~/react-cafe-cms
+      steps:
+        - checkout
+        - restore_cache:
+            keys:
+            # Find a cache corresponding to this specific yarn.lock checksum
+            # when this file is changed, this key will fail
+              - dependency-cache-{{ checksum "package.json" }}
+        - run:
+            name: Save Jest test results
+            command: yarn test --ci --testResultsProcessor="jest-junit"
+            environment:
+              JEST_JUNIT_OUTPUT: "reports/test-results/jest-junit.xml"
+        - store_test_results:
+            path: reports/test-results
+        - store_artifacts:
+            path: reports/test-results
+
+workflows:
+  version: 2
+  build_and_test:
+    jobs:
+      - build
+      - test:
+          requires:
+            - build

package.json

@@ -45,6 +45,7 @@
     "enzyme-adapter-react-16": "^1.0.1",
     "jest": "^21.2.1",
     "jest-enzyme": "^4.0.0",
+    "jest-junit": "^3.1.0",
     "nodemon": "^1.12.1",
     "react": "^16.0.0",
     "react-dom": "^16.0.0",