build(circleci): added config

Author: amejiarosario

.circleci/config.yml

@@ -0,0 +1,42 @@
+# Use the latest 2.1 version of CircleCI pipeline processing engine, see https://circleci.com/docs/2.0/configuration-reference/
+version: 2 # use CircleCI 2.0
+jobs: # a collection of steps
+  build: # runs not using Workflows must have a `build` job as entry point
+    docker: # run the steps with Docker
+      - image: circleci/node:lts # ...with this image as the primary container; this is where all `steps` will run
+    steps:
+      - checkout
+      - run:
+          name: update-npm
+          command: 'sudo npm install -g npm@latest'
+      - run:
+          name: Check current version of node
+          command: node -v
+      - run:
+          name: Check current version of NPM
+          command: npm -v
+
+      - restore_cache: # special step to restore the dependency cache
+          # Read about caching dependencies: https://circleci.com/docs/2.0/caching/
+          key: dependency-cache-{{ checksum "package.json" }}
+      - run:
+          name: install-npm-wee
+          command: npm install
+      - save_cache: # special step to save the dependency cache
+          key: dependency-cache-{{ checksum "package.json" }}
+          paths:
+            - ./node_modules
+
+      - run: # run tests
+          name: test
+          command: npm run ci
+
+      - store_artifacts: # special step to save test results as as artifact
+          # Upload test summary for display in Artifacts: https://circleci.com/docs/2.0/artifacts/
+          path: test-results.xml
+          prefix: tests
+      - store_artifacts: # for display in Artifacts: https://circleci.com/docs/2.0/artifacts/
+          path: coverage
+          prefix: coverage
+      - store_test_results: # for display in Test Summary: https://circleci.com/docs/2.0/collect-test-data/
+          path: test-results.xml

package-lock.json

@@ -17,7 +17,7 @@
     "watch": "jest src/ --watch --coverage",
     "coverage": "jest src/ --coverage && open coverage/lcov-report/index.html",
     "lint": "npx eslint --fix --format codeframe src/",
-    "ci": "npx eslint src/ && npm test"
+    "ci": "npx eslint src/ && jest src/ --coverage"
   },
   "keywords": [
     "algorithms",