language: python

# Python versions specified to make tox environment 'py35' and 'py36' work.
# See: https://github.com/travis-ci/travis-ci/issues/4794
# Environment changes have to be manually synced with 'tox.ini'.
# See: https://github.com/travis-ci/travis-ci/issues/3024

matrix:
  include:
  - python: '2.7'
    env: TOXENV=py27
  - python: '3.5'
    env: TOXENV=py35
  - python: '3.6'
    env: TOXENV=py36

install:
  - pip install -r requirements.txt
  - pip install coveralls

script:
  - tox

after_success:
  # Coveralls submission only for py35 environment, because of being the only
  # one that executes doctest-modules testing, according to tox.ini.
  - if [ ${TOXENV} = "py35" ]; then coveralls; fi