.travis.yml

language: python
jobs:
  include:
    - name: "Formatting checks on Python 3.7 (Xenial Linux)"
      python: 3.7
      install:
        - pip3 install -r requirements.txt
        - pip3 install black isort
      script:
        - isort -c -vb ./*.py
        - black --target-version py35 --check ./*.py
      after_script: true
    - name: "Python 3.5 on Xenial Linux"
      python: 3.5      
    - name: "Python 3.6 on Xenial Linux"
      python: 3.6
    - name: "Python 3.7 on Xenial Linux"
      python: 3.7
    - name: "Python 3.8 on Xenial Linux"
      python: 3.8
addons:
    apt:
      packages:
        - texlive-latex-extra
        - texlive-fonts-recommended
        - msttcorefonts 
        - dvipng
        
install:
  - pip3 install -r requirements.txt
script:
  - python3 -V
  - python3 -m py_compile configs.py example.py reaction_pypaths.py
  - mv output.png reference.png
  - python3 example.py
  - identify reference.png
  - identify output.png
after_script:  
  - compare reference.png output.png diff.png
  - curl --trace-ascii - --upload-file ./diff.png https://transfer.sh/diff.png