language: python
matrix:
  include:
    - name: "python 3.7 Xenial"
      dist: xenial
      python: 3.7
    - name: "python 3.7 Windows"
      os: windows
      language: shell       # 'language: python' is an error on Travis CI Windows
      before_install: choco install python
      env: PATH=/c/Python37:/c/Python37/Scripts:$PATH
    - name: "python 3.7 MacOs"
      os: osx
      language: shell       # 'language: python' is an error on Travis CI macOS
      cache:
        directories:
          - "$HOME/Library/Caches/Homebrew"
          - "$HOME/Library/Caches/pip"
      before_install:
        - brew update
        - brew install tcl-tk
        - brew install python3 --with-tcl-tk
        - python3 -m pip install --upgrade virtualenv
        - virtualenv -p python3 --system-site-packages "$HOME/venv"
        - source "$HOME/venv/bin/activate"
install: pip install wheel PyMuPDF pytest pdfrw
script:
  - python --version
  - python3 --version
  - python -c 'import tkinter'
  - pytest test.py