version: 2
shared: &shared
    docker:
        - image: circleci/node:latest
    steps:
        - checkout
        - restore_cache:
            key: dependency-cache-{{ checksum "package.json" }}
        - run:
            name: Update npm
            command: 'sudo npm install -g npm@latest'
        - run:
            name: Install npm dependencies
            command: npm install
        - save_cache:
            key: dependency-cache-{{ checksum "package.json" }}
            paths:
              - node_modules
        - run:
            name: Tests
            command: npm test
        # - run:
        #    name: Report Coverage
        #    command: npm run coverage

jobs:
    node-latest:
        <<: *shared

    node-10:
        docker:
            - image: circleci/node:10
        <<: *shared

    node-9:
        docker:
            - image: circleci/node:9
        <<: *shared

    node-8:
        docker:
            - image: circleci/node:8
        <<: *shared

workflows:
    version: 2
    commit:
        jobs:
            - node-latest
            - node-10
            - node-9
            - node-8