version: 2.1

jobs:
  build:
    working_directory: ~

    # Use a basic node image
    docker:
      - image: circleci/node:10.16.3

    steps:

      # Checkout the source code
      - checkout

      # Update NPM
      - run:
          name: Update NPM
          command: 'sudo npm install -g npm@latest'

      # Restore the dependency cache
      - restore_cache:
          key: dependency-cache-{{ checksum "package-lock.json" }}

      # Install dependencies
      - run:
          name: NPM Install
          command: npm install

      # Save the dependency cache
      - save_cache:
          key: dependency-cache-{{ checksum "package-lock.json" }}
          paths:
            - ./node_modules

      # Run tests with coverage
      - run:
          name: Run Tests
          command: npm run test:cover

      # Store the test results for inspection in CircleCI
      - store_test_results:
          path: test_results/test_results.xml

      # Upload the coverage report to coveralls
      - run:
          name: Upload Coverage
          command: cat test_results/coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js