version: 2
jobs:
  test-py35:
    docker:
      - image: python:3.5

    steps:
      - checkout

      - run:
          name: Run coverage tests
          command: |
            pip install coverage
            coverage run setup.py test
            coverage report -m

  test-py36:
    docker:
      - image: python:3.6

    steps:
      - checkout

      - run:
          name: Run coverage tests
          command: |
            pip install coverage
            coverage run setup.py test
            coverage report -m

  test-py37:
    docker:
      - image: python:3.7

    steps:
      - checkout

      - run:
          name: Run coverage tests
          command: |
            pip install coverage
            coverage run setup.py test
            coverage report -m

      - save_cache:
          key: coverage-{{ .Branch }}-{{ .Revision }}
          paths:
            - .coverage

  codecov:
    docker:
      - image: python:3
    steps:
      - checkout

      - restore_cache:
          keys:
            - coverage-{{ .Branch }}-{{ .Revision }}
      - run:
          name: Upload to codecov.io
          command: |
            pip install codecov
            codecov

  style:
    docker:
      - image: python:3
    steps:
      - checkout

      - run:
          name: Run flake8
          command: |
            pip install flake8 flake8-docstrings
            flake8


workflows:
  version: 2
  test:
    jobs:
      - test-py35
      - test-py36
      - test-py37
      - codecov:
          requires:
            - test-py37
      - style